Thank you for the bug report. The current version of libpam-radius-auth is missing the ipv4 and ipv6 settings for pam configurations. This was fixed upstream here: https://github.com/FreeRADIUS/pam_radius/commit/8d373539bb9f13b0abfe8bcae0095a930a00fad0
I created a PPA to test that adding this commit fixes the issue here: https://launchpad.net/~lvoytek/+archive/ubuntu/libpam-radius-auth-ipv4-6-yes-no If you would like to test it you can run the following commands: sudo add-apt-repository ppa:lvoytek/libpam-radius-auth-ipv4-6-yes-no sudo apt update sudo apt upgrade Also of note, this bug seems to match up with (LP: #2065737) ** Changed in: libpam-radius-auth (Ubuntu) Status: New => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2068729 Title: pam_radius_auth: Failed to open RADIUS IPv6 socket: Address family not supported by protocol To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libpam-radius-auth/+bug/2068729/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs