http://bugs.winehq.org/show_bug.cgi?id=11388
--- Comment #11 from Vitaliy Margolen vitaliy@kievinfo.com 2008-02-13 18:04:00 --- Have you looked at the network traffic with something like wireshark? Does Wine even communicating to the other side? It might unrelated to windows networking. Hard to tell. Port 6129 looks like only used by DameWare so you might be right.
Look at the traffic see if there is anything obvious there. Also it might be it's getting confused by whatever data it does not receive from Lsa* functions. Unless you fake it it's hard to tell as well. Of course you can't use native dlls here - it's too low level functionality.