Upstream provides a unit-file[1]. It should be installed (probably via `systemd` USE flag). [1]: http://shorewall.git.sourceforge.net/git/gitweb.cgi?p=shorewall/shorewall;a=history;f=Shorewall/shorewall.service;h=b74f3acf46d8415ea6dedc2ac102b5d137e014d2;hb=HEAD
(In reply to comment #0) > Upstream provides a unit-file[1]. It should be installed (probably via > `systemd` USE flag). No, for the record, small configuration files that are mainly intended to support other packages should not be installed according to USE flags. See also bug #198901.
Thanks for reporting. Added for version 4.5.17 (unconditionally, thanks jer for pointing out)