I didn't know what Satan was I had to look it up. :P Satan appears to be pretty old and doesn't appear to be maintained any longer. Look at section 8.6 here for other options you might try.
Anyone else know of a good program that does the same thing as Satan? Satan stands for Security Administrator's Tool for Analyzing Networks. I appears to just be a port scanner.
nmap would probably be another option. It is included with most Linux distributions. You might already have it installed.