Unidentified Network - Kerberus Auth Problem only with SSL and without NETBIOS

Question

Hello we are disbled NETBIOS / WINS for our Domain Network on client side. Since we did this we have problems to authentificate on our domaincontroller through VPN SSL. With VPN IPSsec all is fine. Also in LAN all is fine. Both, SSL and IPSec using the same firewall rules. With NETBIOS enable authentification with SSL works fine. Domaincontroller gets Kerberos ticket also with SSL. We tried with several machines with same result. Sophos TAP adapter has lowest interface metrik from all adapters (2) . Any ideas why this happens? Please see also attached pictures. Thanks a lot for helping IPSec: 
 
 SSL:

LuCar Toni · Answer

So basically windows is doing something like a discovery. Not sure what Windows does there and needs to be "reverse engineered" to get to the bottom of this. SSLVPN does something different than IPsec in terms of IPsec. So that could be the cause. 
 Check the openvpn community as well, if you find some kind of hint there.

Unidentified Network - Kerberus Auth Problem only with SSL and without NETBIOS

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