I'm going to install Shorewall on a Debian stable Linux box. The shorewall version in the stable repositories is 184.108.40.206-2.
Shorewall website suggests to pin apt preferences and force the download of the new Shorewall version from testing repos.
Package: shorewall Pin: release o=Debian,a=testing Pin-Priority: 700
Have you ever done something like that and do you think it is safe?