Technical Details
Protocols allowed
Egress traffic for the following IP protocols are not blocked:
| TCP Port | Use |
|---|---|
| 22 | SSH (secure shell) |
| 80 | HTTP (web access) |
| 110 | POP3 (inbox access) |
| 143 | IMAP (inbox access) |
| 443 | HTTPS (secure web access) |
| 465 | SMTPS (secure mail submission) |
| 587 | SMTP (mail submission) |
| 993 | IMAPS (secure inbox access) |
| 995 | POP3S (secure inbox access) |
| 1723 | PPTP (VPN) |
| 5190 | AOL/AIM |
| UDP Port | Use |
| 500-599 | ISAKMP and other UDP VPN traffic |
| 1701 | L2TP (VPN) |
| 4500 | Cisco PIX (VPN) |
| Other IP | Use |
| ipencap (4) | IP Encapsulation (VPN) |
| esp (50) | Encapsulating Security Payload (VPN) |
| gre (47) | Generic Routing Encapsulation (VPN) |