For IT Pros This page contains information about the "Mostly Closed + Remote Administration + UI" campus firewall group.
The Mostly Closed + Remote Administration + UI firewall group is designed for web or email servers, allowing access to those services without being fully exposed to the Internet. It can be too permissive for some desktop systems, and too restrictive for other types of servers.
The difference between the Mostly Closed group and a group with the
+RA identifier is that this group allows users and administrators to
remotely administer the computer from off campus.
Note, in 2017 the Chief Privacy and Information Security Officer placed significant restrictions on inbound traffic for Remote Administration services. As such, the only remaining ports allowed by the +RA modifier are ports 3283 and 5988.
The difference between other groups and a group with the +UI
identifier is that this group places no restrictions on network traffic
between the University of Illinois campuses.
From computers that are not part of the University network:
Like the Mostly Closed group, HTTP, HTTPS, IMAP, secure IMAP, POP3, secure POP, FTP, SFTP, SMTP, and H.323 are allowed. (A specific port list is available.)
Assuming that a machine uses the standard ports for its services, placement in this group means that users from outside the firewall will be allowed to initiate connections with encrypted and unencrypted web servers, mail servers, FTP sessions, and voice-over-IP connections on machines in this group. However, no other services will be accessible to outside users if a machine is in this group.
To computers that are not part of the University network:
All (except the ports that are always blocked in both directions)