Dan > do not block/monitor the following ports: > 21 FTP > 22 SSH (if you are using SSH) > 23 Telnet > 25 Sendmail > 53 DNS (unless you are not using DNS then I suggest blocking this port) > 79 finger (optional, I block it) > 80 HTTP > 81 Admin HTTP (Web admin) > 110 POP3 > 143 IMAP