Problems with Specific Servers
There are a number of server-specific issues that you may be affected by if you run any given server. These are, by nature, in constant flux, and it would be foolish to attempt to summarize them. The only way to keep track of these is to monitor the newsgroups, FAQs, and mailing lists related to the Web and specifically related to the server you choose to run. There are also general security groups and mailing lists that you can follow that deal with security issues in general. Please note, however, that these groups, and in fact most newsgroups, are not specifically intended for Web users' questions. Have a little netiquette and don't spam these groups with your questions. Take the time to read their FAQs and follow the discussion for a while before posting questions if appropriate.
Caution:
If you run your server under Windows NT, it's generally a very bad idea to place the perl.exe executable within the cgi-bin directory. Never, ever, do this under any architecture. No matter how frustrated you become with trying to figure out how to get the File Manager's associations to work with specific extensions, it's just not worth the risk. There has been a CERT announcement about this, too. For more information, see ftp://ftp.cert.org/pub/cert_advisories/CA-96.//.interpreters_in_cgi_bin.