October 2007


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I ran into a strange issue with a Cisco ASA firewall today. The firewall was not passing traffic to the internal host although I had the static statement configured and access-lists allowing incoming traffic.

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If you are new to Cisco equipment, command filtering may be new to you. If so, it will be worth your time to learn these shortcuts. 

If you are a veteran engineer, you probably use filtering with every command and this tutorial may seem too basic for you. However, you may not know that you can search through your command output even after the command is entered, using the forward-slash…see below.

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A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or individual users with secure access to their organization’s network.  The following tutorial will show you how to connect two locations together with an IPSec VPN using pre-shared authentication.

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