You get an ICMP and then you know that this server is not available. If you do DNS SRV you can try the next one on the list.
CS > -----Urspr�ngliche Nachricht----- > Von: [EMAIL PROTECTED] [mailto:sip-implementors- > [EMAIL PROTECTED]] Im Auftrag von Jason Tomforde > Gesendet: Mittwoch, 6. November 2002 17:55 > An: [EMAIL PROTECTED] > Betreff: [Sip-implementors] ports > > Hello, > > If a SIP message arrives on a port that does not have SIP service enabled > (perhaps not 5060), what should the response be of the SIP device? or > will > the device handle any request to any port? The question has arisen > because > with a DNS bind (port 53) if the DNS service is not running on that port > of > the server, the response is an ICMP unreachable (on UNIX anyhow). Is > there > any such thing for SIP? > > Thank you. > > Jason Tomforde. > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
