"This tutorial shows how to set up a CentOS 4.6 based server
that offers all services needed by ISPs and web hosters: Apache web
server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS,
BIND DNS server, Proftpd FTP server, MySQL server, Dovecot
POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the
32-bit version of CentOS 4.6, but should apply to the 64-bit
version with very little modifications as well..."