I have not seen this before and would like some advice please.
On a wired connection only, my Leap 15.0 laptop can’t ping or send any messages out (no response, 100% packet loss).
At the same time the other machine (Leap 15.1) can ping my laptop without difficulty, but can’t ssh to it.
The strange thing is that I did not actively change any setting, and up to now I was able to connect my laptop of the local network without difficulty.
Thanks for the help.
Although sudo netconfig -f update did not change the situation, I discovered that the network manager was managing connections - it used to be managed by wicked and I did not change this setting myself. When I changed back to wicked I could once again access other machines. So problem solved.