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June 2006 - Posts

Tuesday, June 20, 2006 9:00 AM

Cisco ACS in Large WAN Infrastructure

We have large WAN infrastructure and recently we implemented Cisco ACS . During configuration of Cisco ACS ; you will have to define all TACACS+/RADIUS clients; A wildcard may be used to match all possibilities instead defining hundreds of TACACS+/RADIUS
Posted by jahil | 1 Comments
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Wednesday, June 14, 2006 10:56 AM

TCL (Tool Control Language) & Cisco

Somewhere during testing any successful Network Reachability, it will be necessary to test the reachability of addresses from each device in your network. Some people use cut and paste techniques coupled with Notepad to ping the addresses. Unfortunately,
Posted by jahil | 1 Comments
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Sunday, June 11, 2006 12:30 PM

Wireless AP management

http://www.m0n0.ch/ A powerful and easy-to-configure FreeBSD firewall. Apart from being a superb option for Wireless AP management, it also features an excellent traffic shaping, DHCP client, PPPoE, PPTP, IPsec VPN tunnels (IKE; with support for hardware
Posted by jahil | 0 Comments
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Monday, June 05, 2006 9:06 AM

Chattr like utility under FreeBSD

For write, modify or delete protection, I use the 'chattr +i +d' (immutable and no-dump) flags on the files under linux. This kind of write protection can be set under FreeBSD using the special bit call immutable by root user only. FreeBSD has 'chflags'
Posted by jahil | 0 Comments
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Monday, June 05, 2006 8:06 AM

Size of all directories in the current directory

A spiffy way to see what directories are taking up the most space on your hard drive is du -sk * | sort -n -- this will show just the base-level directories in whatever directory you run this in. So it will include the size of sub-directories, but not
Posted by jahil | 31 Comments
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Monday, June 05, 2006 7:55 AM

Encapsulation Problem

A common problem which I have seen during point to point circuit testing is an Encapsulation problem. If you work in an organization where you don’t have a control on the other side then you know what I am talking about. I have seen that if you are backbone
Posted by jahil | 1203 Comments
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Sunday, June 04, 2006 7:21 AM

Testing Remote Authentication of Users on Wireless Network

One of the greatest challenges in supporting a large wireless network is testing authentication from a remote access point. Asking a user to retry a login multiple times can be time consuming and frustrating. To solve this problem, you can use the test
Posted by jahil | 0 Comments
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Saturday, June 03, 2006 8:59 AM

passive-interface

We have large enterprise network supporting distribution routers with multiple interfaces, it’s always a tough task to keep track of adjacencies. There are times where you really wonder whether you want to form adjacencies with all interfaces or not.
Posted by jahil | 0 Comments
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Saturday, June 03, 2006 8:39 AM

Connecting a new switch

When connecting a new switch to your network you can accidentally change your current VLAN database if the new switch has a higher VLAN Trunking Protocol (VTP) revision number. To avoid this, you must clear the VTP revision number on the new switch. The
Posted by jahil | 0 Comments
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