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Masood Ahmad Shah

This blog contains a summary of my research readings and thoughts in system and network engineering. View Masood Shah's profile on LinkedIn

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Scripting for Switches/Routers
The advantage of having a scripting language on your router seems to come in pretty handy sometimes (though I bet most people don’t really use the Tcl interpreter on their Cisco’s). I have been using TCL scripts for ages. The new EEM is just heavenly, Read More...

Posted Monday, March 23, 2009 5:57 PM by jahil | 0 Comments

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Exploiting Network Protocols to Exhaust Bandwidth Links
In Feb 2008 I spoke at a conference about "Exploiting Network Protocols to Exhaust Bandwidth Links" in Lahore . "Chase 2008-Conference On Hacking And Security" Venue Institute of Engineers Pakistan IEP Building 2nd Floor, Engineering Centre 97-B/D-1, Read More...

Posted Friday, February 06, 2009 11:45 PM by jahil | 0 Comments

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How to identify/reset the stuck sessions in Cisco Router's
There are 5 max concurrent session in Cisco world. There can be a situation in life in which the max concurrent sessions reach the limits. When addressing such situations, it might help. The following command on Unix will dump all the TCBs of the remote Read More...

Posted Friday, July 20, 2007 10:58 PM by jahil | 0 Comments

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simultaneous web connections (Squid)
Today, one of my friends asked me how you limit the number of simultaneous web connections from a client browser system using the open source Squid proxy server. Well, You need to use squid ACCESS CONTROLS feature called maxconn. It puts a limit on the Read More...

Posted Monday, May 07, 2007 5:05 PM by jahil | 0 Comments

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patch in unix
After you make your changes to your working copy, you'll create a patch using diff. To show all the lines that differ between file1 and file2: jahil# diff file1 file2 To create a patch listing the changes from version1 to version2: jahil# diff -aur version1 Read More...

Posted Monday, April 30, 2007 10:36 PM by jahil | 0 Comments

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