Comment # 17 on bug 1043446 from Knut Alejandro Anderssen Gonz�lez

(In reply to Jason Mader from comment #16)
> Well, SuSEfirewall2 isn't used in Leap 15.0 and the new firewall opens the
> ssh port as needed. I suppose this can be closed.

Although it is not present in Leap15.0 this bug was fixed as consequence of a
duplicate one in SLE (bsc#1080630), so it should be already fixed by this
packages:

openSUSE Leap 42.3 (src):    yast2-3.2.45-2.6.1, yast2-network-3.2.51-9.1

The fix was added and described in this PR:

https://github.com/yast/yast-network/pull/608