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Difference between DOS Attack and DDOS Attack

When I started my career as Network Engineer I was not much aware of the difference between DOS attack and DDOS attack. It is because in many sources these two terms used to refer the same/ similar type of attacks where both are using same techniques to shut down victim server. Later when I started learning network security, I realized the difference between DOS and DDOS. To learn more about DOS attack follow the link below.

What is Denial Of Service Attack

What is the Difference between DOS Attack and DDOS Attack


Difference between Denial of Service Attack (DOS) and Distributed Denial of Service Attack (DDOS) lies in the number of participants included in the attack. In DOS Attack one computer is participating but in DDOS attack multiple computers are participating in the attack. Both are using the same technique to down the victim like sending too much connection requests to the victim and let the victim crash. The concept of botnet lies with DDOS Attack. Each computer participates in the Distributed Denial of Service Attack is called botnet. A botnet can be either an infected computer or an active computer designed to participates the attack.

Both DOS and DDOS attacks are difficult to stop without hurting the functionality of the victim server. It is because unlike other hacking attempts, DDOS attacks do not utilize the source code vulnerability but over-using the resources of the server. In some recent studies, it is revealed that no one is using the traditional methods like sending too many packets (layer 3 attacks) to down the victim but they learned many advanced techniques to bypass the Firewall protection against Distributed Denial of Service Attack. Some advanced hacking groups possess the knowledge to attack a victim through various network layers using different vectors. They may first start with sending an unlimited number of ICMP messages and later turn to UDP, TCP, etc. It makes the attack more complex.


So in a nutshell Denial of Service Attack (DOS) uses one computer to attack a server where DDOS uses multiple computers to complete the mission.


Further Readings

1. What is TCP Split Handshake Attack

2. What is Smurf attack and How to prevent it

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Destination Net Unreachable

List of Most Common SEO mistakes by Newbie Webmasters

Nowadays most webmasters know the importance of SEO and learn it by themselves to improve traffic to their websites. However, many newbies tend to make many mistakes while doing it for their website. This article is for newbies who do not know the basic Search Engine Optimization rules. It may help at least a handful of newbie webmasters to correct their web page optimization mistakes. Here I focus the On-Page factors rather than Off-Page tactics. The most common On-Page SEO mistakes are:

  1. Not using Title Tag

    A properly optimized title tag can improve the Search Engine rank of a website for the specific keyword. Search Engines take first 72 characters of the title tag to determine the page content. If anyone is not using optimized title tags for his website, he is making a big SEO mistake.

  2. Not optimizing images properly

    Images have a big effect on drawing traffic. Google not only brings traffic via image search but also from the web search too. See the image below where I look for the keyword Belkin Router Setup. After the first three results for Belkin Router Setup, you can find the image portion.


    Google shows a part of images in Google web search. So properly optimized images have the potential to get traffic from direct Google Search. In image optimization, you should care about the alt image tag, title tag, image name etc.


  3. Usage same meta tags for multiple pages

    This issue is most common in dynamic sites where multiple pages have same meta details. This may create a duplicate content issue and can prevent those pages from getting better Search Result rank.

  4. Not looking in SEO at the time of website development

    Search Engine Optimization is not an afterthought. You should have an SEO plan at the time of designing and developing the websites.

  5. Keyword stuffing

    This is one of the most common Search Engine Optimization mistake which may affect the quality. Unnecessary repetition of the keywords in website content may ruin the quality of the content and readers will turn away from it.

  6. Avoiding important tags

    Proper usage of strong, header tags, meta tags etc are necessary for a successful optimization.


  7. Keeping a dynamic URL structure

    Keeping a dynamic URL structure is a big SEO mistake. URL structure should be static.

  8. Not doing proper competition analysis and keyword research

    SEO cannot be started without performing proper competitor analysis and keyword research. We should understand the strengths and weakness of our competitors first.

  9. Avoid Internal Linking

    Well planed internal linking is very important in site optimization.

  10. Using frames

    It was an old SEO mistake where some designers use frames to display content. Google spiders cannot read content in frames.

  11. Not targeting the right keyword

    It is because of the lack of proper business analysis and keyword research. If you are not targeting the right keyword, you may not get business from your web pages.

  12. Heavy use of flash and scripts

    Heavy use of flash and scripts can create obstacles for Google spiders from crawling your web pages.

  13. Not checking the quality of content

    For a successful website quality content is a must. Content should be unique and valuable for users.

  14. Stop doing SEO once the target is reached

    Many do the same mistake and let competitors beat them again. SEO is a continues process and one cannot stop it as long as his competitors are working.
Technology Blog

I don't like Rapid Firefox Updates, Why ?

According to the new policy of the Mozilla team, in every 6 weeks, they release a new version of Firefox. Mozilla team claims, this rapid release helps to bring more capabilities to the browser. They say, the Internet is very fast and they cannot allow Firefox development moves at a speed of traditional desktop software development. The success of the Google Chrome browser may also motivate the Mozilla team to take such a decision. However, many people find this new Mozilla policy a little bit awkward. First of all, Chrome and Firefox are not equal. Chrome has a set of users who like the features of that browser but most of the Firefox users are the traditional users who like the traditional look and features. By trying to imitate Chrome, they make traditional Mozilla users disappointed. It is better to stay Firefox as Firefox and Chrome as Chrome. Here I list some of the common issues with the rapid release are:

  1. Add-on compatibility issues

    One of the major issue with rapid Firefox browser release is the add-on compatibility. When I downloaded Firefox V5, I was surprised to see even Google toolbar was not compatible with it. Many of my add-ons were useless including in-house tools. Anyway, Mozilla team is about to find a solution to fix the add-on compatibility issue by following a bunch of new policies. You can read it by following the link below.
    https://wiki.mozilla.org/Features/Add-ons/Add-ons_Default_to_Compatible

  2. Losing customization

    This is another major problem, every techie users face. After installing a newer version, we need to customize it again from scratch.

  3. Conflicts with Enterprises IT policy

    Fast release of a widely used browser may create an additional burden for IT departments. IT staff need to test the new version with all internal web-based tools they use. Sometimes they may need to update the in-house tools to make it compatible with the latest version.

  4. Problems for web designers

    Though they are adding interesting features for web developers, it is difficult to check the compatibility of web design with multiple versions.

In my opinion, they should try to make the program more stable with minor updates instead of rapid major releases. However, for me, Firefox is my first choice due to its high stability. If you want to block it asking to download the latest version of the software, click on the link below.
Disable Mozilla Automatic Update Check

Even though you can disable it, it is advised to go with the latest version of Firefox browser because of the added security and functionality. It is highly risky to run an obsolete version of tools on your PC as their known vulnerabilities may be used by hackers to attack your computer system.

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Technology Blog

Error 619: A Connection to the Remote Computer Could not be Established

Today morning while trying to connect to the Internet, I received following error message Error 619: A Connection to the Remote Computer could not be established, so the port used for this connection was closed. According to Microsoft support, error 619 can occur if your computer has any third party programs which are not releasing the Winsock stack after any type of Internet activity. Some examples of this kind of programs are Download Accelerator Plus and Zone Alarm.

Some support forums tell another possibility which causes error 619. It is the registry error caused by improper uninstallation of previously installed programs on the computer. They recommend registry cleaning to fix this error.

I was using Photon Plus to connect to the Internet. The message box looks like below.
Error 619: A Connection to the Remote Computer could not be established, so the port used for this connection was closed

How to Solve Error 619



To fix "Error 619: A Connection to the Remote Computer could not be established, so the port used for this connection was closed", follow the steps below.

  1. Reset Winsock
    The first step to troubleshoot this error is to reset the Winsock on your computer. If you do not know how to do it, we have a detailed guide about this procedure.

    I suggest you click on the link below to reset Winsock.
    How to Reset Winsock

  2. Disable Firewall and network utility programs installed
    We can resolve the majority of port-related issues by turning off security programs installed on a PC. Examples of Internet-related programs are download accelerator, Firewall, torrent, etc.

    If you have any such programs installed on your laptop, I suggest you disable them as the part of the troubleshooting.

  3. Check COM Ports
    We should make sure that the dialer (Internet Access Manager) is using the COM ports. To check this follow the steps below.

    • Right click on My Computer and Click on Properties

    • Go to Device Manager

    • Check Ports (COM & LPT)
      How to fix error 619

    I suggest you read the article below to learn more about it.
    How to Change COM Port Assigned


  4. Reboot Computer
    After performing the above steps restart your computer.

I suggest you read troubleshooting guides for some of the related system error codes.

  1. Error 718: The Connection was Terminated
  2. Error 651: The Modem has Reported an Error
  3. Error 777: Connection Attempt Failed

The most common reason for error 619 is the presence of Internet utilities on a computer.

  1. PING: Transmit failed. General Failure
  2. Differences Between DOS and DDOS Attacks
  3. Anonymous Proxy Detected, Click Here

Once you have rectified the issue by disabling it, you need to read the manual or call respective technical support to learn the correct configuration to avoid error 619.

Subscribe Other's Updates in Facebook Using Subscribe Button

Maybe due to the continued efforts to keep Facebook on top due to the competition from Google plus, the Facebook team added a new feature which allows a user to subscribe updates of other profiles. They introduce new subscribe button which let a user receive the public postings of any specific profile. It is not like welcoming all junk posts of the subscribed user, but you can specify which type of updates you want to receive. There are 3 options "all updates, most updates and only important" are available. You can select either one of the options at the time of subscribing to a profile. Many believe the new feature resembles the Twitter. It is because the new Facebook subscribe option performs the same duty of tweets from a followed user.

We cannot see the "Allow Subscribers" button for all Facebook profiles. Users should enable this option first to show subscribe button on their profile. It is to protect the privacy of a user if he doesn't like others receive his public postings. It is also important to note that any uncontrollable information outflow may risk our privacy. A good marketer or hacker can gather sensitive information by constantly analyzing our activities by subscribing to our daily updates. They can use that information for their benefits. That is the reason by default no one can subscribe button displayed for our account updates. If you like to enable the subscribe button for your Facebook profile, follow the steps below.

1. Click on Subscribe option below your Facebook profile picture

2. Click on Allow Subscribers
receiving


3. Click on OK (Edit Subscriber settings)
got


To view updates from subscribed users, click on subscriptions below friends.
view

To read more about this new feature click on the link below.

http://blog.facebook.com/blog.php?post=10150280039742131

Technology Blog

How to Fix DNS Issues in Tata Photon Plus USB Modem

I have been using Tata Photon Plus for more than one and a half year. Though I am satisfied with overall performance, I faced DNS related issues many times. Many occasions I lost access to Internet due to the issues of default Tata Photon Plus DNS server. I am sure many Photon plus users face the same issues and looking for a solution to fix it. Here I present one practical solution to fix the normal Photon Plus DNS issues.


Change Default DNS of Tata Photon Plus



One of the best solution to fix any DNS related issues is to change the default Tata Photon Plus DNS address to one of the more reliable DNS services. Both Open DNS and Google DNS are better than most of the default ISP owned DNS. In order to change the default DNS configured in Tata Photon Plus follow the steps below.


1. Open Huawei Access Manager

How to Fix dns related problems in Tata Photon Plus

2. Click on Tools and Options

Click on Tools and then select Options.

Create new Tata Photon Plus connection with new DNS

3. Click on Network Settings

Tata Photon Plus Network Settings

To create a new Photon Plus connection profile, click on New.

4. Create new Photon Plus Profile with new DNS

Enter the following details.

Access Number: #777

Username: Internet

Password: Internet

Create new Tata Photon Plus network settings with new DNS

Click on Advanced button to change the DNS Information.

Add Open DNS or Google DNS in Photon Plus network settings

You can use either one of the following DNS addresses as primary and secondary DNS address.

OpenDNS addresses are:

Primary OpenDNS: 208.67.222.222
Secondary OpenDNS: 208.67.220.220

Google Public DNS Addresses are:

Primary Google DNS: 8.8.8.8
Secondary Google DNS: 8.8.4.4


Do not forget to save the settings after entering the details. Next time you should select the new Photon Plus profile before connecting to the Internet. After selecting new customized Photon plus profile, click on connect button.

Tata Photon Plus new connection profile

Here you can see, we are connected to the Internet by the new profile we have created. This new profile is not using default Tata Photon Plus DNS address. So any DNS related issues caused by the Photon Plus server is resolved automatically. If you are using a Linux PC, follow the link below.




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Error 628: The Connection was Terminated by the Remote computer

Google Prevents Access to the Legacy Blogger Account

Are you still using the legacy Blogger accounts? If yes, there is an important update from Google for you.

Google has declared a deadline for Blogger Legacy account holders to migrate to the Google account. If you fail to follow the deadline, you will lose the last chance of migration.

In addition to that, the Blogger will block your access to the account and content.

According to the Blogger buzz post, the last date to migrate your legacy account to Google account is September-30-2011.

After September-30-2011, you will not have access to your legacy blogger account and the content.

How Can I Claim my Legacy Blogger Content?

PS: You can still use the Blogger: Claim your Blog form to retrieve the content. All you have to do is to visit the link.

https://www.blogger.com/legacy-claim.g

You need to log in using the old username and password.

Should I worry About this Blogger Policy Change?

The above deadline affects blogger users who created their blog before 2007 and failed to login after 2007.

Users who logged in to their blogger account after 2007 will not be affected by the new deadline set by blogger.


Reason for such a deadline

Blogger says due to some technical and operational reasons, they have to stop supporting migrating legacy accounts and blogs associated with those legacy accounts after September-30-2011 to Google account.

So users will not be able to migrate their legacy accounts to Google accounts after the deadline. In addition to this, users will not be able to access the blog data and account.

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To read more about the Google decision to shut down the Blogger legacy accounts, visit the link below.

https://blogger.googleblog.com/2011/04/important-note-about-legacy-accounts.html


Team CoreNetworkZ has tons of useful articles related to Blogger blogs like how to optimize a Blogspot blog for more traffic and how to delete the date numbers from the Blogspot post URLs.

  1. How to View the Blogspot Posts in the Reverse Order
  2. How to Setup a Custom Domain Name For Blogspot Blog?

How Does It Affect My Blogspot Blog?

If you are not a legacy Blogger account holder, this update is nothing for you. For those who have created their Blogger blog with Google account has nothing to worry about.

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This update is entirely for the legacy Blogger account holders only.

Error 718: The Connection was Terminated because the Remote Computer did not Respond in a timely manner

Yesterday night while trying to access the Internet, I received one error message and failed to access the Internet. The error message is " Error 718: The Connection was Terminated because the Remote Computer did not Respond in a timely manner".

I am using Tata Photon Plus to access the Internet from my laptop. Network Connection Prompt gives two options either redial or cancel the connection.

I tried redial but right after the authentication process, I received the same Error 718. The error message seems like the modem is trying to authenticate the connection but the remote server/computer seems stopped responding to the modem request. This is how the error 718 message looks like.

How to solve Error 718: The Connection was Terminated because the Remote Computer did not Respond in a timely manner

Reasons for Error 718



The major reason for "Error 718: The Connection was Terminated because the Remote Computer did not Respond in a timely manner" is the modem driver issue. Either the modem driver we are using is outdated or misconfigured.

We get this error message when our computer is expecting a reply/response from the network and if it is failed to receive any in a timely manner, error 718 will be displayed. Another important cause for error 718 is the malfunctioning of the remote server. If the remote server is not in a situation to accept new connections, clients will get the Error 718 message.

How to Solve Error 718

Some workarounds for error 718 is provided below.

1. Disconnect the modem and reconnect

2. Check the modem settings including ISP user name and password

3. Restart your computer and check for the issue

4. Update modem driver

5. Connect the modem to a different computer and check whether the problem is with ISP

6. If the problem is with ISP, contact them to fix it.


Other Error Codes

1. Error 651: The Modem has Reported an Error

2. Error 777: Connection Attempt Failed

Technology Blog

Setup Nokia Siemens Residential Router 1600 with BSNL

Nokia Siemens Residential Router 1600 is one of the common modems provided by BSNL. One of my friends lost the setup disc came with this device and struggled a lot at the time of reconfiguration. In this tutorial, you can learn how to setup BSNL Internet connection using Nokia Siemens Residential Router 1600. Just like other BSNL modem/ router models, we do not need setup disc to configure it. We can do it manually by following the steps provided in this tutorial. At the end of the tutorial, you can see the steps to activate WiFi and wireless security on Nokia Siemens Residential Router 1600.


Configure Nokia Siemens Residential Router 1600

In order to configure this device with BSNL broadband, follow the steps below.
  1. Connect Nokia Siemens Residential Router 1600 to the computer using Ethernet cable

  2. Power on the modem

  3. Type 192.168.1.1 on the address bar of Internet Explorer and press enter
    nokia modem

    Username: admin
    Password: admin

    Now you can access the web-based setup page of Nokia Siemens Residential Router 1600 by entering the login details given. You will be redirected to device info page where you can read basic information about it. You can select the right option to set up this device from the left-hand side menu.
    Network

  4. Click on Advanced Setup
    model

    Delete all connections except VPI/VCL 0/35.

  5. Click Edit button of 0/35
    atm

    Click next. Here we must make sure the value set for VPI is 0 and VCI is 35.
    pppoe

  6. Select PPPoE

    We need to configure PPPoE connection with BSNL modem. So we should select PPP Over Ethernet (PPPoE). Now we should enter the BNSL broadband username and password.
    selection

    We should check

    i. Enable PPP Debug Mode
    ii. Bridge PPPoE Frames Between WAN and Local Ports

    Now click on Next

  7. Enable NAT in Nokia Siemens Residential Router 1600
    Set NAT in Nokia Modem

    We should check

    i. Enable NAT
    ii. Enable WAN Service

    Click Next

  8. Click on Save and we will automatically redirect to the main page.


    We should click on Save/Reboot button there. After this step, we should go to Management (on the left-hand side) and click Save/Reboot to save the current settings properly.

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Technology Blog

Error 651 :The Modem (Connecting Device) has Reported an Error

Today while connecting my laptop to the Internet I received an error message Error 651: The Modem (or other Connecting Device) has Reported an Error. I use Tata Photon Plus to connect my Windows 7 laptop to the Internet. Network Connection Prompt lets me either redial or cancel it. I tried redial option but again I got the same error 651. In this tutorial, I am sharing the steps I followed to fix the message "Error 651: The Modem (or other Connecting Device) has Reported an Error".


Reasons to Get this Message

At first, I checked Microsoft knowledge base for the solution. According to them the reason for Error 651: The Modem (or other Connecting Device) has Reported an Error is with Layer 2 Tunneling Protocol (L2TP). They define the reason for the issue as "It occurs because the Layer 2 Tunneling Protocol (L2TP) tries to create a host route and then detects that the route to the host that was created by the dial-up connection already exists". However, I am not sure if it is the right reason for it because I found this answer under Windows 2000 and the message is related to establishing a VPN connection.
651 :The Modem (or other Connecting Device) has Reported

One of the most discussed reasons for Error 651 is the issues with “raspppoe.sys” file of Windows 7. In many support forums, users comment by replacing “raspppoe.sys” file of Windows 7 with Windows Vista, they could fix the issue. I never tried this method so cannot agree or disagree. If the method mentioned in this tutorial does not work for you, it is a suggested workaround.
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  2. Error 718: The Connection was Terminated
  3. How To Enable Disabled Adapter


Solution

Here I would like to share some practical steps to solve the "Error 651: The Modem (or other Connecting Device) has Reported an Error". I recommend you to follow the steps in the same order I provided.
  1. Click on redial

  2. Unplug the modem and reconnect (For external and USB modems)

  3. Reboot your computer

  4. Use Admin account to connect to the Internet

  5. Remove all Dial-up network connections and create a new one

  6. Ensure that you are using the latest modem driver

  7. Replace “raspppoe.sys” file with Windows Vista's same File


Hints

You can find “raspppoe.sys” file at the following location: c:\windows\system32\drivers. In the same way, you should go to the following location to remove dial-up network connection: Control Panel> Network and Internet> Network Connections
How to solve 651
If you want to delete any dial-up connections, you can do it from here.
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  4. Tata Photon Plus Internet Usage Check
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How to Disable Firefox Software Automatic Update Check

I am a great fan of Firefox browser but I feel little disappointed with their recent policy about increasing the frequency of browser updates. They have reduced the time interval between two Firefox releases and that forced me to adjust to my customization. I use the browsers in my own customized way but whenever I update the current installation, I lose the customization. However, it always looks for new updates and forces me to install the latest release. So I have disabled the automatic check for latest release by Firefox on my computer.

You may see a window like below to alert you the recent release. Since its an automatic check, it can appear at any time on your screen.

I no longer see this alert on my computer because I disabled it. In case if you want to do the same, follow the instructions below.

  1. Start Firefox

  2. Click on Tools or press [Alt] and [T] buttons together

  3. Click on Options

  4. Click on the Advanced tab
  5. Click on the Update tab
    solving bugs of past versions
    Now uncheck automatic update check for Firefox.

Firefox No Longer Finds Latest Versions

On the contrary to what I expressed here, some users enjoy the frequent browser updates. They consider it a good way to fix any possible vulnerabilities in the past versions. Such a user will find it awkward if the browser is not detecting the latest release. If you are such a user and the Mozilla browser installed on your laptop is not automatically checking the new versions, you can fix this issue by following the instructions below.
  1. Press [Alt] and [T] buttons together and select Tools

  2. Go to Advanced tab

  3. Go to Update and check the boxes near automatic check for updates.

Is it Good Practice to Unchecked Auto Update Feature
It is not good to keep the feature auto update check for a longer period of time unless you are manually verifying the status of your current Mozilla Firefox browser status on your device. Keeping an older outdated version of the web browser on your PC itself is a great security vulnerability. Its because hackers already know the bugs in older versions and it will give them the advantage to gain access to your PC. Best practice is to ensure all the software installations on your computer is up to date. Here is a list of interesting tutorials for you.
  1. FireFTP - Free FTP Program
  2. Oops! Mozilla could not find HTTP
  3. XULRunner Error: Platform Version '1.9.1.16' is not Compatible with minVersion
  4. There is Warning While Closing Multiple Tabs
  5. Error 777 : The Connection Attempt failed
  6. Setup Nokia Siemens Residential Router 1600 with BSNL

Error 777 :The Connection Attempt failed due to Remote Computer Out of Order

For the last few weeks, I have been getting an error message "Error 777: The Connection attempt failed because the modem (or other connecting devices) on the remote computer is out of order" while connecting to the Internet. I use Huawei Access Manager to connect to the Internet because the modem provided by Tata Photon Plus is from Huawei. Mainly the issue occurs in the evening (that means the peak time) and the error message prompt me to either redial to connect to the Internet or cancel. Here I would like to share the major reasons of "Error 777: The Connection attempt failed" and its possible solutions. After a few attempts, I would be able to go online but in some worse cases, I waited hours to get rid of the error.

If you are not sure how this error message looks like, have a look at the screenshot provided below.

Error 777: The Connection attempt failed because the modem on the remote computer is out of order


Reasons for Error 777: The Connection Attempt failed

The possible reasons for "Error 777: The Connection attempt failed because the modem (or other connecting devices) on the remote computer is out of order" are:
  1. Usage of the incorrect driver for your modem

  2. The number dialed by your modem is blacklisted

  3. Outdated modem driver

In addition to the above-mentioned reasons, I am getting this error message only in peak time. So I assume, the network users can also be a factor but I am not sure.
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  2. Idea 4G APN Settings
  3. Destination host unreachable


The Solution for Error 777: The Connection Attempt failed

The major reason for "Error 777: The Connection attempt failed because the modem (or other connecting device) on the remote computer is out of order" is faulty modem driver. However, in my experience just restarting the computer itself fixed this issue. So here I would like to share a practical guide to fix this error message.

  1. Unplug the modem and reconnect (If you are using a USB modem or external modem )

  2. Restart your computer

  3. Update the driver

  4. Uninstall the current modem and reinstall it with the latest driver available.

Remedy Recommended by Readers

Two Airtel 4G dongle users ( allsubs99 & Ramesh Nagaraj ) shared their solution to fix this issue. According to them:
  1. Open the Airtel 4G Dongle utility

  2. Find out the Connection Type

  3. Change the connection type from RAS to NDIS
If the issue persists, it is advised to contact your ISP to fix it. Some of the related issues and solutions are provided below.
  1. Error 718: The Connection was Terminated
  2. Error 619: A Connection to the Remote Computer Could not be Established
  3. Error 619: A Connection to the Remote Computer Could not be Established
  4. Error 628: The Connection was Terminated by the Remote computer
  5. Error 797: A Connection to the Remote Access Server was not Made
  6. Error 651: The Modem (Connecting Device) has Reported an Error

How IPv6 is Going to Affect Current Network Structure and Implementation

Many online organizations and companies participated in the World IPv6 Day held on June-08-2011 and it is considered as a success by many sources. Many experts claim IPv6 is mature enough to be implemented because no major issues happened on that day as many feared. So we can expect the implementation of this standard very soon and I would like to share some of my thoughts about IPv6 implementation. Personally, I love to see it in my network but the only problem I am facing is the complicated address format. However, this small issue is nothing compared to the big advantages IPversion6 bring.

Maybe we can forget the NAT after implementing IPversion6 in our network. It is because we do not need private IP addresses any more as no more deficiency of public IP addresses. It can provide more than enough number of IP addresses. Another feature is IPversion6 hosts can autoconfigure themselves while connecting to an IPversion6 network. So it reduces the importance of DHCP. IPv6 host autoconfiguration is using Internet Control Message Protocol version 6 (ICMPv6) router discovery messages but if Pv6 stateless address autoconfiguration failed to perform its duty, DHCPv6 will be used to address the host. So, in a nutshell, we can say, IPv6 reduces the importance of NAT and DHCP.


More IP addresses

Adopting IPversion6 can fix the shortage of IP addresses currently we are facing. It uses 128-bit addresses where IPv4 is using 32-bit addresses. The maximum number of IP addresses generated by IPv6 is 340 undecillion (340 X 10^36) and the maximum number of IP addresses generated by IPv4 is only 4.3 billion. The exact number of IP addresses provided by IPv6 is 340,282,366,920,938,463,463,374,607,431,768,211,456.

Improved Network Security and router performance

One of the major advantages of implementing IPv6 is the improved network transparency. It simply means there is no need to create a private IP address for devices to communicate over Internet and no hiding behind NAT. One major improvement in IPv6 is its added security. IPsec is an integral part of IPv6 architecture to improve network security. IPv6 header format is simple compared to that of IPv4 and it will improve the router performance.


IPv6 Controversies

Like any other movement, IPv6 movement is also not free from controversies. One controversial theorem about replacing IPv4 with IPv6 is to help National security agencies to monitor their citizens more easily. It is because right now many of the electronic devices are behind NAT and using private IP addresses. This makes the monitoring a little difficult for official agencies. It has the ability to provide a single public IP address to each device connected to the Internet. It removes one hurdle for external monitoring. Another issue is about the exposing of MAC address over the Internet as it is a part of IPversion6 address. If the unique MAC address is exposed to the Internet, it will be very easy to track that particular device. Hopefully, we can hide our MAC address by enabling Privacy addressing.

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Get Important Data While Chatting in Gtalk from Google Talk Guru

Google Talk Guru is an experimental service to provide important Search Results (may be most common search results ) in Gtalk itself. The concept is like you are chatting with your friend in Gtalk and you want to know the current status of your favorite sports or the weather in a city at the same time. You do not need to go to Search by leaving the messenger to obtain this information. Google Talk Guru will tell you the current status of your favorite sports or the weather details in Gtalk itself. To get this service you should invite Google Talk Guru to chat with you. You can do it by login to Gtalk and invite guru@googlelabs.com to chat with you. You can use specific commands to obtain results from it. The list of commands provided below.
information

According to this, if you want to get weather details of Delhi, you can type it as weather Delhi. You will get the current weather details from Google Talk Guru. In the same way, you can get the definition of any word by using the command Define. Once you saved guru@googlelabs.com in your contact list, you can use this service at any time. If you want to define a word for example PC, you can simply do it here by typing define PC. Guru will define the word PC on chat window instantly.


Here you are opening another chat window while you are chatting with other contacts. In this window, you can ask the questions you want to search on Google. You will get the answers automatically. So the major advantage of using this feature is freedom from distraction while chatting on messenger in case if you want to search for detail on Google. In most cases, you may need sudden details of currency conversion if you are chatting with a business contact from another country. This feature will immediately convert the current currency to the desired currency with latest exchange rate. It will reduce your time to manually compute the conversion. Another use is to perform basic arithmetic operation. You can simply perform division, multiplication etc on the chat window itself.



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Compare LG Optimus 3D & HTC Sensation -Best Smart Phone Option

Both these phones (LG Optimus and HTC Sensation) have an element of 3D technology, though the LG’s pure 3D screen is more technologically forward thinking than the Sensation’s 3D graphics. However, the two are also part of the new generation of dual-core phones – so let’s compare them.

Compare Processor of LG Optimus and HTC Sensation

The Optimus has a dual-core 1GHz chip with 512mb of RAM whereas the Sensation is running 1.2GHz with 768mb of RAM. On paper and in real life the Sensation is the more powerful device and this does give it a lead. In real life, both are very powerful and there is little in the way of lag in either machine, making this fact not so much of an issue.

Camera Quality

This does offer a different story; the camera of Optimus is a notable 3D flasher, meaning it has two lenses for recording in 3D. Both can record 1080p, though the Optimus also records 3D in 720p for play on the screen. The LG though does have a 5mp as opposed to the Sensation’s 8mp camera for stills. This makes the Sensation a better still life camera, though the 3D capabilities of the LG are very impressive.

Screen

Big screens are increasingly the rage and a 4.3in display is on the show on both these phones. Obviously, you will have gathered from what is previously mentioned that the Optimus has a 3D capable screen. However, the screen itself isn’t as capable as the HTC’s and displays images in 480x800 (WVGA) compared to the near 540x960 (qHD) of the Sensation. The display of Optimus is just not the amazing quality of the NOVA screen of late on other LG phones and so the Sensation offers better colors and clarity when viewing in 2D.

  1. How to Play Angry Birds Game without Downloading
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User Interface

LG is currently using Android 2.2 with the device, upgradable to Gingerbread 2.3 in time. The HTC is equipped straight up with the latest offering and is a dream to use, especially when the Sense interface made by HTC Sensation is taken on board. This really is a smooth operator and though the Optimus is good the HTC is better.

Is LG Optimus or HTC Sensation More Attractive?

Looks wise the HTC is an attractive and very nice phone in the hand. Its uni-body aluminum style is strong yet not too heavy. It’s a simple style that works. The LG is also quite pretty but is heavier than the HTC, weighing in at 168g to the HTC’s 148g. It’s also noticeably thicker, though this may be caused by the 3D technology on board. It’s a stylish phone though and very typical of LG who generally offer fashionable devices.

How to Play Angry Birds Game without Downloading

Angry Birds is one of the famous SmartPhone game (mostly famous among Android users ) developed by Rovio Mobile and have millions of fans. Traditional Angry Birds game needs you to download the software to your Smartphone and install it before playing. Now they introduced a web-based Angry Birds game where you do not need to download any software but just go directly to the web page and start playing. Another advantage of this web version is, you can run it on most browsers. Actually, this web version of Angry Birds is a Chrome App but it works on Firefox, Opera, and even in the Latest versions of Internet Explorer. However, it will not run on Internet Explorer 6 and below versions.



How to Play Angry Birds Web-based Game

It is the same as traditional Angry Birds and some game controls are listed below. If you want to select a bird, you should click on it (left click) and drag it. To use the special powers of the birds, you should use the left click. Key R is used to reset the game level. You can scroll down and up to Zoom out and Zoom in. This zoom feature helps you to aim properly with the green pig. To play the Angry Bird web-based game click on the link below.

http://chrome.angrybirds.com/

save

You should click allow if you want to use the Angry Birds details when you are offline.
Trouble playing Angry birds with cheat codes


Though I successfully played the Angry Birds game in Firefox, Google Chrome, and Opera, I failed to open the page in Internet Explorer 6. I received the following error message while trying to load Angry Birds.
Angry Birds cheats

Bugs and Error While Playing

Though Angry Birds is a stable popular game, it is not free from bugs and errors. Occasionally people find the bugs and report them. If you found a specific bug or issue with playing this game on your Smart Phone, you can list it on their website. It is important to note that if the same bug is reported already, you do not need to register it again. Alternatively, you can check their bug page for any possible bugs on the game version you are currently using. So I suggest you visit the page below in case if you found issues with playing the Angry Birds game on your mobile handset.
http://www.angrybirdsnest.com/bugs/

Once you report the bug, they will fix it on their next version. So you are recommended to update the current version installed. Another useful resource is their support forum. You can directly comment on the trouble you are facing while playing it there. The support forum members will either advise you on how to fix the issue or inform it of a bug and will fix it on the next version. The link to their support forum is given below.
http://www.angrybirdsnest.com/forums/topic/angry-birds-epic-bugs/

Cheat Codes Available For Angry Birds

So if you do not want to play hard to go to the next level, there are some cheat codes available. It is for both Android and iPhone. There are some resources that reveal how to unlock Golden Egg levels. One top-secret to getting the extra benefit is to don't skip challenges. To unlock the next level or unlock the entire game by using the cheat codes mentioned in the articles below.

  • http://www.ign.com/cheats/games/angry-birds-wii-82426

  • http://www.gamespot.com/angry-birds/cheats/

  • http://cheatcodes.com/angry-birds-pc/

  • http://www.cheatbook.de/files/angrybirds.htm

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Don't Get Fooled by MacDefender a Fake Anti-Malware Program

It seems one of the old Windows-based malware tricks started targeting Mac users too. For last few weeks Macintosh users have been tricked by a malware named MacDefender and it seems the number of victims increases rapidly. The same program also appears in some other names like Mac Protector or Mac Security to trick. This software appears like a legitimate security program and prompts Macintosh users to install it by showing some fake malware alerts. Once the user installs the software, it starts asking them to register the program to remove the infected malware and ask credit card details to complete the registration. The same program is suspected to have the ability to steal your sensitive information stored and can disable any legitimate security programs installed. So your Mac will be vulnerable to more attacks in the future.

How Fake MacDefender take control of your Mac


This part shows how this fake MacDefender tricks Macintosh users to get installed. It is clearly understood that if a user knows the pattern of this attack, he can prevent this program from being installed. I hope this article will help Mac users to identify the threat and prevent infection. This infection mainly happens when you browse suspicious websites (websites contain malware. You may notice an alert like Mac or Windows security found some critical activity in your system and you are in danger. To overcome this, you will be advised to run an online scan.
Malicious

You will be prompted to click OK to start the scan. Once you click OK, infection begins.
MacGuard

Here you will see a classic Windows security scan screen. This picture is from the older fake MacDefender and the most advanced versions use the Mac interface to show scan. So beware of this malware actions. It is a JavaScript trick to trap users and it is not a real scan on your Mac.
Alert

Now users will see a fake Mac security scan result showing infections. This is also a page created by JavaScript, either you disable JavaScript to get rid of this page or close the browser.
download

Any action will start a download.
help

Now the program will start an installation window.
stealing the admin password of Mac


Now, this fake Antivirus program asks the admin password to continue its installation. Most Mac users will be tricked to give their admin password. It is clear that the success of this program is due to the ignorance of  users.
Fake MacDefender works

Now the installation completes and this fake MacDefender starts to execute.
Fake MacDefender virus scan and removal

It will continue scan on your Mac and shows you the list of infection found(This is a fake one and do not trust it). Now the last part, the program will ask your credit card information to remove the infection.
Fake AntiVirus ask user credit card details

Users may see something like the image displayed above. This article is provided for informational purpose only and we strongly request users to do not get into the trap created by this fake MacDefender.

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FTP Error 503 Login Authentication Failed

Yesterday while trying to access my web hosting account, I received an error message "503 Login Authentication Failed". I have been using FireFTP as my FTP client for one year and I never faced such an issue. I had been using FileZilla before migrating to FireFTP but it never showed such a problem. However, I do not believe it is an issue with FireFTP. I have checked the username, password and host address once again but they are correct. I tried to log in to web host account a few more times but received the same error. One time it showed a different alert with the same code. The new popup was "503 Login error". This tutorial explains the reasons and solution of "503 Login Authentication Failed". Since I was in a hurry, I couldn't troubleshoot the issue by myself. I deleted the entire FTP cache and entered the FTP server access details manually once again. This time I didn't face any trouble to access the web server. I have saved the screenshot of the popup I received.
popup


Today morning I started searching for more about this message. In many discussion forums, experts say "503 Login Authentication Failed" is due to the incorrect username or password. You may get the alert if the host address is typed wrongly. Another possibility is the usage of Caps Lock without knowing that key is on while entering username and password. Anyway, after clearing the cache of my FTP program (deleted previously saved username, password and host address), I successfully logged in to my server ftp account.

Solution For FTP Error 503 Login Authentication Failed

The reason for 503 Login Authentication Failed: An FTP error occurred - cannot make connection to host is the incorrect File Transfer Protocol login information.

  • Port Number should be 21 (FTP server use port number 21 to transfer files).

  • Host address, FTP username, and password should be correct

  • Make sure Caps Lock is turned off

  • If still the problem is not fixed, clear the cache

PS: Clearing cache means delete all stored FireFTP usernames, passwords, and host addresses. This procedure cannot be undone, so make sure you have the backup of the necessary details you entered.

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Use FireFTP To Move Files Between PC and Server

Today I am going to introduce one free FTP program called FireFTP from one Mozilla team. Right now I am using this tool for uploading and downloading the file from my web server. There is no need to read so many tutorials to operate this tool because it was very clean and simple user interface. Installation of FireFTP is very simple which takes less than a minute and there is no complicated license agreement. We are free to use this FTP program for personal as well as business requirements. The only requirement is the Firefox Browser because it is a Mozilla Add-on. Though this tool is free, you can donate to the developing team if you wish and have that facility there. It has almost all features of any paid FTP programs.

Download and Install FireFTP

Since we have such a wonderful free tool to upload and download files from the web server, there won't be no reason to don't try it.  It is a free Mozilla Addon and you can get it on your PC by following the steps below.

  1. Open Firefox browser

  2. Click on Tools

  3. Click on Add-ons

  4. Select Get Add-ons
    upload files to server

  5. Now Search FireFTP on the Search box on the right-hand top of the window.
    Search Fire FTP

  6. When  Search completes, you should click on the Install button.
    free reliable server accessing tool

  7. After completing the installation, we need to restart Firefox.
    Installing

    Click on Restart Now to restart Firefox browser. After Restart, you can access FireFTP from Tools.

  8. Just click on fireFTP to start this free FTP program.
    download program

You must have the server address and FTP username and password to access the server. It will help you to upload files to server from your PC and you can download any files from the server too.

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My Blog Crossed 100000 Page Views Per Month

First of all, I would like to say thanks to all my blog readers who helped me to achieve the goal of 100000 Page Impressions per month. Right now www.corenetworkz.com successfully maintains 100000 page views per month for one month and I would like to share this happy news with all my blog's readers. With more than 72K visits, this blog received more than 100K Page impressions in this month and I can proudly say now www.corenetworkz.com joined 100K club. I would like to share the screenshots from Google analytics for my readers. I hope my success will inspire other newbie bloggers and I am grateful if this can bring more passionate bloggers. I saw the 100K cross one month ago but I want to make sure it is not just a temporary effect. So I decided to wait for at least one month to make sure it is not just a temporary effect. Now with one month steady analysis of received page impressions, I can state that my blog is getting 100K Page views per month.

This is the traffic graph from Google analytics.


How to get 100K traffic per month



Country Basis Traffic details


This blog is getting more visitors from the United States and the second position goes to India. The United Kingdom is the third country and Canada is in the fourth position. You can see the traffic map given below to analyze the country based traffic to this blog.


100K page impressions per month



Major Traffic Sources for my Blog

According to Google analytics, the major traffic source is Google.

Major traffic sources to my blog


83.02% traffic comes from Search Engines. Yahoo is the second major source of traffic to my blog and Bing at the third position. My blog is getting 10.70% direct Traffic and other sites contribute 6.23% traffic.

Getting Error 678 The Remote Computer did not Respond

Today morning my friend tried to access Internet with his BSNL Broadband connection but failed. Whenever he tried to connect to Internet, he is getting an error message "Error 678 The remote computer did not respond". This issue persists even after an hour so he called me for a solution. Since he is using BSNL broadband, we checked their user manual and this error code is explained in it. Error 678 is due to poor connectivity and most probably modem is the actual reason behind it. The poor connectivity can be due to faulty Ethernet cable, loose connection between modem and computer or even the modem might be corrupted. Some other possible reasons (other than modem faults and connectivity issues) are TCP/IP issues, Firewall blocking or Malicious programs run. This tutorial gives extended support to understand and fix error 678. The steps provided here are applicable to all types of modems.


Error 678 "The remote computer did not respond"

As we said before the major reason for Error 678 is due to poor connectivity and thus the primary steps should be checking the connectivity of the modem. IF that part is correct, then we must proceed to system level troubleshooting.
  1. Check the Cables connected

    We need to ensure that the Ethernet cable is not faulty and the connection is perfect. Check following connections and ensure the respective LED lights on modem are on.

    • Modem and splitter connection

    • Modem and Computer connection

    • Jack in & Jack out of the splitter


  2. Power Cycle the Modem to fix Error 678

    Sometimes a proper power cycle can fix most of the connectivity issues. To perform a power cycle follow the steps provided in the link below.
    How to Power Cycle a Network Device

  3. Reset Winsock and Restart your computer

    The next possible procedure to solve Error 678 is to reset Winsock and restart your PC. To know more about how to reset Winsock click on the link below.
    How to Reset Winsock

    After resetting the Winsock, you should restart your computer and check whether you can go online.

  4. Check whether Firewall blocks your Internet connection

    There is a possibility that Firewall installed on your laptop might block Internet connection and thus getting Error 678. You should disable the Firewall programs (Including Internet Security Suits) and check for the issue.

  5. Check for Virus Infection

    There is a chance that your PC is infected with network worms or other malicious programs. So I strongly recommend you to scan your PC using a trusted Antivirus program and ensure that it is infection free. To read my previous Security articles, click on the link below.
    Ensure your Laptop is Safe from Virus

  6. Reset and Reconfigure the modem

    The last possible step to fix Error 678 is to reset and reconfigure modem. I do not recommend you to perform this (the reason why I give this step only last) if you do not know how to configure the device again. I suggest you follow this step with the guidance of respective ISP technical support person. To know how to reset a device, click on the link below.
    How to Reset a Network Device

These are the come common troubleshooting steps to fix "Error 678 The remote computer did not respond " error message. If the issue persists, I recommend you to contact your ISP and ask whether the issue is with ISP side. If the modem is faulty, they may replace it. Some modem and router configuration guides are:
  1. How to Configure BSNL Teracom Device

  2. How to Configure UTStarcom ADSL

  3. How to Setup Linksys Router

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