aaronm's tutorials

Tutorial: Standard ACL (Access Control List) Basics

Contributed by aaronm on June 18, 2007 under Cisco router

This is a BASIC explanation of Standard ACL’s that SHOULD be fairly easy to understand and span the spectrum of most Cisco routers.

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Cisco PIX Logging: Debugging to Emergency

Contributed by aaronm on February 9, 2007 under Cisco firewall

This article is an outline of how to set up logging on your PIX, viewable to a syslog or through the show log statement. This information is targeted toward the more recent versions of PIX IOS, the older versions run along the same concept but have some different commands.

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The dark secrets of loopback addresses

Contributed by aaronm on January 22, 2007 under Cisco networking

Just some info on loopback virtual interfaces and their uses.

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Serial Point-to-Point Encapsulation Explained

Contributed by aaronm on April 20, 2006 under Cisco router

This is an explanation of serial connection encapsulation (HDLC / PPP) and suggestions on it’s use.

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Cisco Router: Soft and Hard boot of BGP

Contributed by aaronm on March 15, 2006 under Cisco router

Simple commands to reset BGP as a first step troubleshooting technique

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Changing an ACL on a Cisco Firewall

Contributed by aaronm on February 6, 2006 under Cisco firewall

Although changing an ACL on a Firewall is almost exactly like a router, there are a couple nuances that people should know. Here are some tips and best practice material.

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The “Do” command

Contributed by aaronm on February 1, 2006 under Cisco networking

If you are running Cisco IOS 12.2(8) or better, you can use the “do” command to run privileged commands in global config mode. In layman’s terms, you can run “show” commands while config or config-if :)

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How to disable Cisco router domain name lookup

Contributed by aaronm on January 26, 2006 under Cisco router

Ever foul up a command on a router or switch and have to sit there and wait for five minutes while it translates for the “domain” ?

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