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.
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https://bugs.launchpad.net/bugs/1884848
Title:
sshguard.service uses wrong path for iptables; nothing actually gets
blocked
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