Hello! Are you sure it's a bug?
The SIP standard states that the reply should be sent to the topmost Via address, in this case: Via: SIP/2.0/UDP 213.95.149.23:5060;branch=z9hG4bK45607d54 Some applications and in particular VoLTE require that the Via address to be honored. Of course that breaks NAT traversal - but the SIP standard was written well before that became common. Some additional info: http://babel.de/art20080317a.html Paul Chitescu On 06/28/2018 12:00 PM, Matthias Urlichs via Pkg-voip-maintainers wrote: > Package: siproxd > Version: 1:0.8.1-4.1 > Severity: important > > siproxy sends SIP registration replies to the wrong address. > > Specifically, this hostname couldn't be resolved, thus the REGISTER is > rejected: > > [pid 10545] recvfrom(4, "REGISTER sip:pbx1 SIP/2.0\r\nVia: SIP/2.0/UDP > 213.95.149.23:5060;branch=z9hG4bK45607d54\r\nMax-Forwards: 70\r\nFrom: > <sip:smurfaster...@pbx1.noris.net>;tag=as323b8169\r\nTo: > <sip:smurfaster...@pbx1.noris.net>\r\nCall-ID: > 14f44c1b7facb9c843d3b30d046503a1@127.0.1.1\r\nCSeq: 152 > REGISTER\r\nSupported: replaces, timer\r\nUser-Agent: > Smurf-O-Asterisk\r\nExpires: 120\r\nContact: > <sip:1717@213.95.149.23:5060>\r\nContent-Length: 0\r\n\r\n", 8195, 0, > {sa_family=AF_INET, sin_port=htons(5060), > sin_addr=inet_addr("10.107.8.134")}, [16]) = 408 > [pid 10545] sendto(4, "SIP/2.0 408 Request Timeout\r\nVia: SIP/2.0/UDP > 213.95.149.23:5060;branch=z9hG4bK45607d54\r\nFrom: > <sip:smurfaster...@pbx1.noris.net>;tag=as323b8169\r\nTo: > <sip:smurfaster...@pbx1.noris.net>\r\nCall-ID: > 14f44c1b7facb9c843d3b30d046503a1@127.0.1.1\r\nCSeq: 152 > REGISTER\r\nContent-Length: 0\r\n\r\n", 280, 0, {sa_family=AF_INET, > sin_port=htons(5060), sin_addr=inet_addr("213.95.149.23")}, 16) = 280 > > SIP states that INVITEs et al. shall go to the address named in > the Contact: header. This however is not an INVITE but a reply to > a registration attempt. It needs to be sent to the host+port which > transmitted the original request. > > -- System Information: > Debian Release: buster/sid > APT prefers testing > APT policy: (750, 'testing'), (700, 'stable'), (600, 'unstable'), (550, > 'experimental') > Architecture: amd64 (x86_64) > Foreign Architectures: i386 > > Kernel: Linux 4.13.0-1-amd64 (SMP w/1 CPU core) > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), > LANGUAGE=en_US.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > Init: systemd (via /run/systemd/system) > > Versions of packages siproxd depends on: > ii adduser 3.117 > ii libc6 2.27-3 > ii libltdl7 2.4.6-2.1 > pn libosip2-11 <none> > > siproxd recommends no packages. > > siproxd suggests no packages.
