Originally Posted by EastChestnut

Generally, no.
eastchestnut@UNIX:~> nmap www.phillyblog.com

Starting Nmap 4.20 ( http://insecure.org ) at 2008-05-15 06:36 EDT
Interesting ports on 69.36.15.196:
Not shown: 1679 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
25/tcp open smtp
26/tcp open unknown
53/tcp open domain
80/tcp open http
110/tcp open pop3
143/tcp open imap
179/tcp filtered bgp
443/tcp open https
587/tcp open submission
993/tcp open imaps
995/tcp open pop3s
1720/tcp filtered H.323/Q.931
2605/tcp filtered bgpd
3000/tcp open ppp
3001/tcp open nessusd
3306/tcp open mysql

Hummmmmmmmmm............