Division of Information Technology ServicesWestern University

Blocked Ports

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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