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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 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 i…

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:

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.

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 k…

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:

Add-on compatibility issues

One of the major issue with rapid Firefox browser release is the …

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.



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 …

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 …

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



2. Click on Tools and Options

Click on Tools and then select Options.



3. Click on Network Settings



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

4. Create new Photon Plus …

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 an…

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.



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…

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.
Connect Nokia Siemens Residential Router 1600 to computer using Ethernet cable

Power on the modem

Type 192.168.1.1 on address bar of Internet Explorer and press enter


USER Name: admin
Password : admin

Now you can access the web based setup page of Nokia Siemens Residential …

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 t…

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.


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.

Start Firefox

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

Click on Options

Click on Advanced tab


Click on Update tab


Now uncheck automatic update check for Firefox.
Firefox No Longer Finds Latest Versions
On the contrary to what I expressed here…

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.






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. Us…

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 autocon…

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.


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 …

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 sti…

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. Y…

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 …

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 th…

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.

Open Firefox browser

Clic…

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 …