I have SIP registrations working correctly for FWD and Sipphone, but it is impossible to connect to Sipcall or Nikotel, I saw that someone on the list has problems with ICH. To try and sort out the problem I tried to register to Sipcall with Linphone and sent the dialogs to tech support of the equipment provider. Here is their answer:- The reason the registration fails is because not all of the required authentication parameters are provided by Linphone. The Linphone does not send nc (nonce-count), qop (quality of protection) and cnonce (client nonce). It is then not fully compatible with the standard specification on the authentication scheme used for SIP (RFC 2617). Some SIP servers (sipcall.co.uk for example) may not accept this as it would make them vulnerable for replay attacks. Is this also the case with *? That may explain the registration problems. -- Dave Cotton <dcotton@linuxautrement.com>
Dave Cotton wrote:> I have SIP registrations working correctly for FWD and Sipphone, but it > is impossible to connect to Sipcall or Nikotel, I saw that someone on > the list has problems with ICH. >Does this imply that it will work even in a NAT environment? I have watched the list like a hawk for evidence of FWD working for machines placed behind NAT, but so far haven't seen that anyone could actually get it going. If so, that would be waaaaaay good news for us NAT-captives. . Thx. B.