Open ports

On Dreamhost servers one finds many open ports, $ nmap example.org Starting Nmap 4.68 ( http://nmap.org ) at 2008-10-09 07:18 CST Interesting ports on apache2-adamant.spyro.dreamhost.com (208.113.253.95): PORT   STATE    SERVICE 21/tcp open     ftp 22/tcp open     ssh 25/tcp open     smtp 80/tcp open     http The above services are well known and understood, but 111/tcp filtered rpcbind 113/tcp open    auth 548/tcp open    afp 587/tcp open    submission 691/tcp open    resvc perhaps are for a few of the websites on the shared server, thus all websites on the server will appear to have them open too, though not apparently a security risk...