Block Lists

The Information Security Office (ISO) maintains a list of hosts that are blocked from the campus network that can be viewed by anyone with a valid CalNet login. You can track open ISO security issues related to each blocked host.

A list of CalNet UIDs blocked from the eduroam network and/or VPN is available to specific IT support staff at:

Some ports are blocked by default on the campus networks:

  • 137/tcp
  • 138/tcp
  • 139/tcp
  • 445/tcp
  • 69/udp

If you believe your account or computer has been blocked because of a security alert, please look for an email from 'Security Operations via RT <>' and send an email with the ticket number to:

Please include the ISO ticket number [ISP #11xxxxx], with brackets in the subject line.