If you're like me and are setting up a demo network with FTP, HTTP, yadda yadda yadda, and are experiencing aggravatingly slow connections (for example the ftp command takes a minute or something to go through) you may be running into problems with DNS. Often times you can "fix" the problem by simply adding the hostnames of the nodes on your demo network and their IPs to your /etc/hosts file. I did this and voila, FTP was zippy again.

Ubuntu should be considered bad because it doesn't let me make vsftpd insecure enough to do ftp bounce attacks. Fedora should be considered good because it does :-)

Speaking of FTP bounce, it's an old technique but it's hella cool when you see how it works. Here are some reference sites for my own purposes.