How To – Create Cisco Switch with IOU [IOS On Unix] Loaded on CentOS

Posted by Ahsan Tasneem | 10:36 AM | , , , , , | 1 comments »

The tutorial describes steps required for creating Cisco switch based on IOUl2. The Qemu image with installed CentOS Linux is loaded with IOU image. The IOU (IOS on UNIX) instances are attached to the network using script written by Jeremy L. Gaddis. The script forwards frames between a IOU instance and a Qemu network adapters. The script is started using tap mode when Qemu interfaces are bridged with virtual tap interfaces.

iPad Mini Vs iPad 2 Vs iPad 4 - [Detailed Comparison]

Posted by Ahsan Tasneem | 12:18 AM | , , , | 0 comments »

Here’s a detailed comparison chart from Apple themselves which compares the iPad mini, iPad 2 and iPad 4 together. But, choose wisely! 
You can find more detail about this on apple's own website. I'll be posting more on this soon, keep following.

Cisco Switch Password Recovery - In Few Easy Steps

Posted by Ahsan Tasneem | 3:02 AM | , | 0 comments »

Note: This article is based on a Cisco Catalyst 2900, 3500XL, 2940, 2950, 2955, and 3550 switches, for other you can search and find them easily using any search engine
To recover a password on a Cisco switch, you will have to be connected to the console port of the Cisco switch using 9600 baud, 8 bits, no parity, 1 stop bit, and xon/xoff flow control. I recommend using Hyperterminal that comes with Windows XP.
Once you are connected and see something on the terminal window when you press enter, unplug the power cable. Next, hold down the mode button on the front, as seen in the photo below, and connect the power cable.

On a 2900, 3500XL or 3550 (like the one shown) release the mode button after the 1x port LED goes out. On a 2940 or 2950 switch release the mode button after the stat light goes out. On a 2955, press the break key (ctrl-break on Windows) when you see the message that the switch will autoboot.

Configuration: Windows native DialUP VPN client & Netscreen

Posted by Ahsan Tasneem | 12:30 AM | , , , , , | 0 comments »

As the subject of this topic states I want to create a dialup VPN to a Netscreen Firewall. To make it more complex I will choose the onboard Windows VPN client. At the moment only a few documentations exist and most of them contain only pieces of the whole setup process. Different threads in discussion groups out there state that the whole XP-VPN/Netscreen thing will not be possible but they lack the proof that this cannot be done.

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