Comment # 4 on bug 1146856 from Robert Divko

Bug is in all current opensuse branches: Leap 15.1, 15.2, Tumbleweed
and thus seams to wait long for a solution already.
I have two cases of reboot hang due to firewall blocking
because of it (can't prove).

I would asked for sulution within fail2ban because it's part of the package:
# rpm -ql fail2ban | grep system
/usr/lib/python2.7/site-packages/fail2ban/server/filtersystemd.py
/usr/lib/python2.7/site-packages/fail2ban/server/filtersystemd.pyc
/usr/lib/systemd/system/fail2ban.service