May 23

Cisco 5508 WLC Configuration LAB – WPA2, Guest Access, FlexConnect (aka H-REAP)

This posts starts with setting up a LAB to configured and test WLC. The WLC will be setup with two SSIDs on local and remote site. The SSIDs will support WPA2 and Guest access with web authentication. Also, the remote site will support FlexConnect for one SSID which means traffic will not be transported back …

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May 22

Fedora ARM Image Installer–SD Card Selection

I was trying to follow this guide ( to put Fedora ARM image to my SD card which needs to be at least of 2GB capacity. However in image installer window I was not getting the exact option to selection SD as destination device for image. I was getting harddisk1 (8G) instead of anything …

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May 10

Cisco 5508 WLC Setup and Initial Configuration

This post details how to  do initial Cisco 5508 WLC setup and in the next post it goes into more detailed steps of configuring WLANs. Following are some pictures of the device and then we start with initial configuration and software upgrade




Cisco 5508 WLC …

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May 09

Cisco ASA 8.4 Migration – Test it first on GNS3

This post details how to test Cisco ASA 8.4 migration on GNS3 such that you know in advance how its going to effect your existing configuration(Pre 8.3).  To do this you will have to first follow the following post which will get you an ASA working and is connected to its host machine.

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Mar 23

ASA 8.4 Site to Site IPSec VPN – Hairpinning

This post details how to setup Site to Site VPN with ASA 8.4 and hairpinning enabled. This would mean that remote site can not only get access to networks on Main Site but can also access the internet through this site.  This Lab is built on the previous lab however instead of allowing only particular …

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Mar 18

Connect GNS3 Network to Real Networks / Other GNS3 Network

This posts details how to connect GNS3 network to real networks. you can use this post for various scenarios, in fact whatever you can think of. So, say for example you have a physical router connected to your home network and you want to configure VPN between your router and  ASA (or any other device) …

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Mar 18

Windows 7 as Router

Here is quick way to make work Windows 7 as Router.


1. Click on Start button and Search for ‘regedit’ which a short name of Register Editor in Windows.

Click on picture below see it in bigger size.


2. Once found, click on it to open it.

3. In the newly …

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Mar 15

Cisco MDS 9000 Series AAA Configuration

Here is a sample for Cisco MDS 9000 Series AAA Configuration. There are two parts of it, one is to config ACS Server and Second is to configure the Switch itself. First I am detailing the switch configuration and then the ACS Config.


Switch Configuration

We need some basic knowledge of the setup before …

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Mar 15

Cisco MDS 9000 Key Mismatch Error for SAN-OS Version 3.1 – AAA Config

Though 3.1 is quite old version but still maybe in use on Fabric Switches somewhere on your network. While configuring AAA on these switches you specify Shared Secret key which matches with what you had configured on your ACS / Radius Server. The product documentation states that you can any secret key within certain length …

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Mar 13

Telnet to Router Interface from outside


This post answers the typical question of how to Telnet to Router Interface from outside. Also it details the configuration steps which enables telnet access to router’s outside interface.

I have setup a small lab on GNS3 to give an exact idea of how an internet facing router is typically

configured and how you can modify …

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