Generally (but not limited to ), - 407 proxy responses for messages sent to SIP clients. - 401 responses for messages sent to SIP servers.
E.g. - messages like INVITE & BYE will receive 407 responses - messages like REGISTER & SUBSCRIBE will receive 401 responses. On 20-Oct-2015 8:07 PM, "Brett Tate" <br...@broadsoft.com> wrote: > > You are totally right, although I have a confusion here about > > what proxy is challenging me with the 407 response code? > > An intermediary (proxy or B2BUA) is challenging the request. > > > > I mean by the word proxy what does the server mean? > > RFC 3261 section 6 provides the definition of proxy. However if a B2BUA > relays requests, it may challenge such requests using a 407 response. > > RFC 3261 section 22.3 may be helpful. > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
