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 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. 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 attack) 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 unlimited number of ICMP messages and later turn to UDP , TCP etc. It makes the attack more complex.


So in a nut shell 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

Technology Blog

List of Most Common SEO mistakes by Newbie Webmasters

Now a days most webmasters know the importance of SEO and learn it by themselves to improve traffic to their websites. However, many newbies tends 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 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 big effect in 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 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 potential to get traffic from direct Google Search. In image optimization you should care 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 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 after thought. 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 dynamic URL structure

    Keeping 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 webpages.

  12. Heavy use of flash and scripts

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

  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 Mozilla team, in every 6 weeks they release new version of Firefox. Mozilla team claims, this rapid release helps to bring more capabilities to the browser. They say, Internet is very fast and they cannot allow Firefox development moves at a speed of traditional desktop software development. Success of Google Chrome browser may also motivated 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 the 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 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. Loosing customization

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

  3. Conflicts with Enterprises IT policy

    Fast release of a widely using browser may create additional burden for IT departments. IT staff need to test the new version with all internal web based tools they use. Some times they may need to update the in-house tools to make it compatible with 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 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 risky running obsolete version of tools on your PC as their known vulnerabilities may be used by hackers to attack your computer system.

You May Be Interested
  1. Pop Up Blocker Is Turned Off

  2. There is No Properties Right Click Menu Element

  3. I Don't See Any Images From Internet

  4. Spell Checker Is No Longer Working


Technology Blog

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

Today morning while trying to connect to Internet using my Photon Plus connection, 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 that is 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 in our computer. They recommend registry cleaning to fix this error.

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

In order to reset winsock, click on the link below.

How to Reset Winsock

2. Disable Firewall and network utility programs installed

By turn off any Internet related programs in your computer, you can avoid port related issues. Examples of Internet related programs are download accelerator, Firewall, torrent etc.

3. Check COM Ports

We should make sure the COM ports are used by the dialer (Internet Access Manager). To check this follow the steps below.

i. Right click on My Computer and Click on Properties

ii. Go to Device Manager

iii. Check Ports (COM & LPT)

How to fix error 619

4. Reboot Computer

After performing the above steps restart your computer.


Further Reading

1. Error 718: The Connection was Terminated

2. Error 651: The Modem has Reported an Error

3. Error 777: Connection Attempt Failed

Technology Blog

Subscribe Other's Updates in Facebook Using Subscribe Button

May be due to the continues efforts to keep Facebook on top due to the competition from Google plus, 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 to 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 option 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 other 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 those 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 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 in over all 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 issuesand 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 service. 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

User Name : 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 Photon Plus server is resolved automatically. If you are using a Linux PC, follow the link below.

Configure Tata Photon Plus for Linux PC


Technology Blog

PING: Transmit failed. General Failure - Reasons and Solution

Yesterday while checking network connectivity, I received one error message while trying to ping loopback address from my Windows computer. The error message I received is "PING: Transmit failed. General Failure" and all the packets send from command prompt were lost. I tried to ping a different loopback address but the result was same. I fixed the issue by following a set of steps and sharing those troubleshooting steps in this tutorial hoping it may help in case if you experience the same error message PING: Transmit failed. General Failure.


Broadband Hack To Improve Speed

This is the output I received when I ping loopback address.

C:\Users\sijugk>ping 172.0.0.21 

Pinging 172.0.0.21 with 32 bytes of data: 
PING: transmit failed. General failure. 
PING: transmit failed. General failure. 
PING: transmit failed. General failure. 
PING: transmit failed. General failure. 

Ping statistics for 172.0.0.21: 
   Packets: Sent = 4, Received = 0, Lost = 4 (100% loss) 



Reasons and fix for PING: Transmit failed. General Failure


Major possible reasons for the error message  PING: Transmit failed. General Failure are:

  1. Misconfigured Firewall
  2. Outdated Network drivers or firmware
  3. DNS and other socket issues
  4. Other software or hardware errors

Solution for Ping: Transmit failed. General Failure


We can resolve it by following the steps provided below.

  1. Power Cycle the entire network :
    To know more about this step go to the link below.
    How to perform power cycle

  2. Command Prompt troubleshooting :

    Use the following command prompt commands to solve the issue.

    • ipconfig/release

    • ipconfig/renew

    • ipconfig /flushdns

    • netsh int ip reset c:\tcp.txt

    • netsh winsock reset

    Type each commands on command prompt and press enter. After completing every commands reboot your computer.
  3. Disable Firewall (other security programs ) and check for the issue: Sometimes you may get this error message "PING: Transmit failed. General Failure" when firewall stops packets.
  4. Perform System Restore to last known good configuration
  5. Update the adapter driver: To perform this step follow the instructions provided in the link below.
    How to Update Adapter Driver from Device Manager
  6. Update the modem and router (if any) firmware

Just like this guide for "Ping: Transmit failed. General Failure" error message, we have a troubleshooting guide for some other important Internet connectivity error messages. They are:
Error 718: Connection was terminated

Above error message says about a state where the entire connection is terminated. However, if the modem fails to get a connection with remove host you will receive following error message.
Error 777 : Connection Attempt failed

Technology Blog

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

Yesterday night while trying to access Internet, I received one error message and failed to access 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 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 remove 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 issues. 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 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 remote server. If the remote server is not in a situation to accept new connections, clients will get 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 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 computer using Ethernet cable

  2. Power on the modem

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

    USER Name: admin
    Password : admin

    Now you can access the web based setup page of Nokia Siemens Residential Router 1600 by entering the logon 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 setup 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 redirected to 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.

Popular Tutorials
  1. Configure Teracom WiFi Device

  2. Nokia Siemens C2110 ADSL

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Technology Blog

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

Today while connecting my laptop to 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 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 most discussed reason 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.


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 Internet

  5. Remove all Dial up network connections and create 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 following location to remove dialup network connection: Control Panel> Network and Internet> Network Connections
How to solve 651

Further Read
  1. 777: Connection Attempt Failed

  2. Computer Reboots Without Warning

  3. How to Bypass Vista Admin Password

  4. Tata Photon Plus Internet Usage Check

Technology Blog

How to Disable Firefox Software Automatic Update Check

I am a great fan of Firefox browser but I feel little disappointment 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 with my customization. I use the browsers in my own customized way but whenever I update the current installation, I loose the customization. However, it always look for new updates and force 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.
 Checker

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 Advanced tab
    Releases

  5. Click on 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 fast browser updates. They consider it as a good way to fix any possible vulnerabilities in the past versions. Such a user 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.


Recommended Readings

  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

Technology Blog

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 device) on the remote computer is out of order" while connecting to 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 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 few attempts I would be able to go online but in some worse cases I waited hours to get rid of the error.

I took the screenshot of the error message.

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 device) on the remote computer is out of order" are:

1. Usage of incorrect driver for your modem

2. The number dialed by your modem is blacklisted

3. Outdated driver for modem

In addition to the above mentioned reasons, I am getting this error message only in peak time. So I assume, the network usage can also be a factor but I am not sure.


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 USB modem or external modem )

2. Restart your computer

3. Update the driver

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

If the issue persist, it is avised to contact your ISP to fix it.


Technology Blog

How IPv6 is Going to Affect Current Network Structure and Implementation

Many online organizations and companies participated 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 the 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.

May be 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 advantage of implementing IPv6 is the improved network transparency. It simply means there is no need to create 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 the network security. IPv6 header format is simple compared to that of IPv4 and it will improves therouter 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 make the monitoring a little difficult for official agencies. It has the ability to provide 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 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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  1. TTL Expired in Transit

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  3. Destination Host Unreachable

  4. How to Activate BSNL WiFi

Technology Blog

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 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 of distraction while chatting on messenger in case if you want to search for a 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 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 chat window itself.



Related Articles

1. Disable Chat Without blocking Gmail in a Network

2. How to Check Reading Level of any website Search

Technology Blog

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

Both these phones (LG Optmius 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 Optmius 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 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 Optmius is just not the amazing quality of the NOVA screen of late on other LG phones and so the Sensation offers better colours and clarity when viewing in 2D.

User Interface

LG are 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 Optmius 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 aluminium 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.

Technology blog

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 of the browsers. Actually this web version of Angry Birds is a Chrome App but it works on Firefox, Opera and even in 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 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 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 help you to aim properly to the green pig. To play 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 Angr Birds details when you are offline.
Trouble playing Angry birds with cheat codes


Though I successfully played Angry Birds game in Firefox, Google Chrome and Opera, I failed to open the page in Internet Explorer 6. I received 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 issues with playing this game on your Smart Phone, you can list it on their website. It is important to note hat 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 to visit the page below in case if you found issues with playing 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 the trouble you are facing while playing it there. The support forum members will either advice you to how to fix the issue or inform it as a bug and will fix on next version. 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 next level, there are some cheat codes available. It is for both Android and iPhone. There are some resources which reveals how to unlock Golden Egg levels. One top secret to get extra benefit is to don't skip challenges. To unlock 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 appear 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 user install 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 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 uses 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 ask 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 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 in to the trap created by this fake MacDefender.

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Technology Blog

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 login 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 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 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 file from my web server. There is no need to read so many tutorials to operate this tool because it has 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. Only requirement is 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 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 Search box on the right hand top of the window.
    Search Fire FTP

  6. When  Search completes, you should click on 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 server too.

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Technology Blog

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 achieved 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 screen shots 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 United States and the second position goes to India. United Kingdom is the third country and Canada is in fourth position. You can see the traffic map given below to analys 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 third position. My blog is getting 10.70% direct Traffic and other sites contributes 6.23% traffic.