IP Personality
hehe, do you want to give a personality to your Linux Box?? Want your box to behave like say, a Windows machine or a Solaris box?? It's possible.... but only if you have a 2.4 or above kernel. Take a look at IP Personality.
The Linux IP Personality patch adds to your Linux 2.4 kernel the ability to have different 'personalities' network wise, that is to change some characteristics of its network traffic, depending on different parameters (anything you can specify in an iptables rule: src/dst IP address, TCP or UDP port, etc.)