Author: admin

Set Login Restrictions to protect Cisco IOS Routers & Switches
While no security is fool proof, it is important that we do as much as we can to ensure maximum protection on our netowrk devices like Routers and Switches. Cisco IOS has enhanced Login restriction features which can control login attempts to it. This includes time delay between failed login attempts, block period after a set of failed login attempts and audit logs of successful and failed login attempts.
These login restrictions provides more control and make it that more harder for unauthorised accesses and prevent against Dictionary based DoS attacks.
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March 20, 2008
How to set Passwords in Cisco IOS Routers and Switches
One of the basic configurations when setting up a Cisco Router or a Cisco Switch is setting the passwords. This includes, setting the passwords for the Console, Telnet/SSH and the Enable (Enable Secret)
The following procedure will help starters set up passwords in Cisco Routers and Switches running Cisco IOS.
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March 20, 2008
How to setup 802.1q Trunk Port in Cisco Switches (IOS)
Trunk Ports are switchports on Cisco switches that interconnect switches. The trunk port carries traffic for all the VLans across the switches it interconnects. switchport can be enabled and configured as trunks without much trouble.
The following procedure helps setting a switchport into a Trunk port with 802.1q encapsulation.
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March 19, 2008
How to prevent Routing updates on interfaces of Cisco Routers
When we configure a routing protocol on Cisco IOS Routers, it is important to consider preventing Routing updates sent on interfaces that are not required to (say a LAN where there is no other router in the segment to receive any updates). This ensure we are not passing updates that could cause network issues. Needless to say, the network becomes less chatty and can make life more easy when sniffing or spanning for network troubleshooting.
In Cisco IOS we can globally or selectively prevent interfaces on which we do not want routing updates to be sent. Ideally, it would be better that we do this globally and then selectively allow interfaces that can send routing updates.
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March 18, 2008
Privoxy – Enhanced Non-Caching proxy to block ADs Banners etc
Privoxy is a free Opensource Non-Caching proxy aimed at blocking ADs, Banners, Image Ads and enhance Online privacy. Privoxy is based on Internet Junk Buster and has more enhanced filtering capabilities.
Apart from the main functions of Cookie management, AD/Banner blocking, Privoxy can also has the following special features
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March 15, 2008
Internet Junk Buster – Free Opensource Non-caching proxy for online privacy
Internet Junk Buster is a free Opensource Non-Caching proxy for personal use on your PC or server system for company networks or even ISPs. Internet Junk buster is a privacy-enhancing proxy that blocks ads and banners that you wish you never want to see on websites. Blocking these ADs and banners on the website diretly improves the performance on the access to the site.
Internet Junk Buster runs on most of the Linux and Unix systems including Sun Solaris and HP-UX and Windows platforms. There is a seperate installer package available for Windows.
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March 15, 2008
WWWOFFLE – Free Webproxy with privacy Security Offline support
WWWOFFLE – World Wide Web Offline Explorer is a free simple easy to configure Webproxy with good security and privacy features. WWWOFFLE is designed to work for Unix and Linux based systems and a partially functional port is available for Windows.
WWWOFFLE can be used for a network with multiple PCs or can be used just on your local PC to improve performance and offline availability of pages.
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March 15, 2008