None of the machines I've upgraded to focal from bionic have a symlink in /sbin/iptables.
$ namei -l /sbin/iptables f: /sbin/iptables drwxr-xr-x root root / drwxr-xr-x root root sbin iptables - No such file or directory However you're right that a fresh install does have them. I'm not sure what is supposed to install the symlinks, but it doesn't seem to happen on upgrades. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1884848 Title: sshguard.service uses wrong path for iptables; nothing actually gets blocked To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sshguard/+bug/1884848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs