I had the latest 7.5 version of nethserver serving only as a domain controller (samba 4.7.10). I started the new upgrade on NethServer release 7.6.1810 (final) (samba 4.8.6) and after the upgrade everything started to go wrong… i could not ping my AD IP address, nethserver IP, web gui was not working, yum couldn’t resove (but the ping was working towards the internet) etc . Checking it with systemctl, everyhing was running, no errors in journal.
After two hours of restarting, searching, I lowered kernel back on 3.10.0-862.14.4.el7.x86_64 and everything returned to normal.
Did anybody had similar problems?