The Penguin's Practical Network Troubleshooting Guide - page 5

Start with Cable Testing

Running tests from outside your LAN, and from different geographical locations, is a great way to pinpoint trouble spots. A good way to do this is to have nice friends in other cities or other countries who give you shell accounts on their servers. Another way is to use Websites that are set up for remote network testing; see Resources for a list. You can do some low-budget remote testing without leaving your network administrator lair by using a dialup Internet account.

Resources

• See the helpful man pages for all of the commands in this article
• Spy on Yourself with tcpdump
• Spy on the Spyware with tcpdump
• Go Beyond Ping and Traceroute With Cable Testing
• The Serial Console: A Front Door Worth Leaving Open
• Building a Linux Dialup Server
• Websites with remote testing tools:
• DNSStuff.com
• Traceroute.org
• Sam Spade

This article originally appeared on Enterprise Networking Planet, a JupiterWeb site.