Hi, Helmut Wolf wrote: > Hi Benny, > > In RFC 3489 the situation is not described if we got no response from the alternate server. I think this is a special network > configuration I have tested :-) > IMHO this assertion is not correct. In such a case you might have 3 possible NAT types - a port restricted (Test #1 & #3) - a restricted (Test #1 & #3) - or a symmetric NAT (Test #1) depending on one (Test#1) or two (Test #1 & #3) additional tests you'll have to perform after Test#2 has failed. Please check rfc.3489 page 21 for clarity. Cheers Alain -- "" (o)(o) ___o00o__(__)__o00o_____ 1024D/A9F85A52 2000-01-18 Dipl.-Ing. Alain Totouom <totouom at gmx.de> PGP Fingerprint DA18 0DF2 FBD2 5F67 0656 452D E3A2 7531 A9F8 5A52