In an effort to further secure the Western network, we are continually shutting down access to potentially sensitive network ports. Currently, ports 1-1023 are blocked by default, with the following exceptions:
| Port | Service Name |
| 20 | ftp-data |
| 21 | ftp |
| 22 | ssh |
| 25 | smtp |
| 27 | ssh-preferred |
| 53 | domain |
| 69 | tftp |
| 80 | http |
| 109 | pop2 |
| 110 | pop3 |
| 123 | ntp |
| 143 | imap |
| Port | Service Name |
| 220 | imap3 |
| 389 | ldap |
| 443 | https |
| 444 | snpp |
| 465 | smtps |
| 500 | isakmp |
| 548 | afpovertcp |
| 554 | rtsp |
| 587 | submission |
| 636 | ldaps |
| 993 | imaps |
| 995 | pop3s |
The following ports are also blocked by default:
| Port | Service Name |
| 3389 | Remote Desktop Protocol |
| 6667 | Internet Relay Chat (irc) |
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