well, as for now i am in DMZ so there are ALL ports forwarded to me ^^ the problems should not be port related i guess...
my ISP is freenet Cityline GmbH (i am from germany).
i´ve planned to change my isp already so i hope it is a isp related issue and it is no problem with my next isp.
although i have no problems with all other games and i can play demigod with gameranger... thats the strange one.
if i can provide any other information to help the developers (and in the end maybe me ^^) i will try to supply it; just ask, please.
some more information:
uPNP is disabled
igmp is disabled
dos protection is disabled
"use TCP SYN Flood" disabled
i forwarded port 6000 - 6200 for UDP and set port 6002 - 6200 in ImpulseReactorOptions.
unfortunatly i´ve done this a long time ago... so it doesn´t help me.
as far as i know supreme commander uses a similar networking technique, but runs without problems here.
i thank you very much for your patience and for your attempts to help me. nice to see such kind of support!