Now that I've switched to Gentoo Linux, I had to learn a few tricks about getting my favorite software installed. One application I can't live without is GNS3, or the Graphical Network Simulator. It allows you to easily simulate a network of Cisco routers in an easy to use, drag and drop interface. I've used it to study for a number of Cisco certification tests (and pass them too!) and it really helps. If you have access to a few IOS images that Dynamips supports, I encourage you to install GNS3 to simplify your studies.
Getting GNS3 installed under Gentoo Linux takes a little more work since Gentoo is a source distro (you have to compile the software yourself) but is well worth the effort.
Read on and find out how to get GNS3 working in Gentoo Linux!
Two cool articles up on Linuxjournal.com regarding IPTables, the built-in firewall for Linux. I've struggled to learn how IPTables works (especially after using the excellent OpenBSD pf firewall) but these videos really explain IPTables well:
Part 1
Part 2
I would encourage you to watch both videos if you use Linux, especially if your system is exposed to the Internet (not behind a home router).