Date: Fri, 3 Feb 2012 13:56:56 +0100 From: Matthias Apitz <guru@unixarea.de> To: freebsd-net@freebsd.org Cc: "Alfred E. Heggestad" <aeh@db.org> Subject: Re: PPP to UMTS provider && incoming traffic (TCP, UDP) Message-ID: <20120203125655.GA2143@tiny> In-Reply-To: <20120117190847.GA1255@tiny> References: <20120117190847.GA1255@tiny>
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El día Tuesday, January 17, 2012 a las 08:08:48PM +0100, Matthias Apitz escribió: > Hello, > > I'm used to connect my FreeBSD 10-CURRENT netbook to Internet via PPP; > the provider in question is a German O2 UMTS provider; so far so good, > i.e. all is working as it should: outbound HTTP, SSH, SMTP (I'm just > sending this mail through such a connection), ... > > what does not work is VoIP; the call is established via SIP (using a > STUN server), but remote audio RTP packages are not coming down; I > checked this with TCPDUMP: only upstream RTP is send, no incoming UDP; the above (only upstream RTP) looks like this in TCPDUMP: 13:32:40.345152 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.366523 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.387812 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.398505 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.419845 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.441164 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.462554 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.483815 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 13:32:40.505161 IP 10.59.47.201.1028 > 86.64.162.35.12978: UDP, length 172 no UDP from 86.64.162.35 (ekiga.net) is coming through while connected via O2 UMTS network; I've borrowed another SIM card from Vodafone.de and with this it looks better like this: 12:07:42.541558 IP 86.64.162.35.11108 > 127.0.0.1.1024: UDP, length 172 12:07:42.549452 IP 109.43.97.247.1024 > 86.64.162.35.11108: UDP, length 172 12:07:42.551554 IP 86.64.162.35.11108 > 127.0.0.1.1024: UDP, length 172 12:07:42.570774 IP 109.43.97.247.1024 > 86.64.162.35.11108: UDP, length 172 12:07:42.572426 IP 86.64.162.35.11108 > 127.0.0.1.1024: UDP, length 172 12:07:42.592137 IP 109.43.97.247.1024 > 86.64.162.35.11108: UDP, length 172 12:07:42.592243 IP 86.64.162.35.11108 > 127.0.0.1.1024: UDP, length 172 12:07:42.611989 IP 86.64.162.35.11108 > 127.0.0.1.1024: UDP, length 172 12:07:42.613485 IP 109.43.97.247.1024 > 86.64.162.35.11108: UDP, length 172 12:07:42.634805 IP 109.43.97.247.1024 > 86.64.162.35.11108: UDP, length 172 12:07:42.656108 IP 109.43.97.247.1024 > 86.64.162.35.11108: UDP, length 172 ... i.e. there is coming RTP traffic down with destination 127.0.0.1 (localhost); but the SIP client 'baresip' does not see this; in 'baresip' only the outbound bit/s shows some value ~64255 bit/s, while the inbound stucks with zero; any idea? Thanks matthias -- Matthias Apitz e <guru@unixarea.de> - w http://www.unixarea.de/ UNIX since V7 on PDP-11, UNIX on mainframe since ESER 1055 (IBM /370) UNIX on x86 since SVR4.2 UnixWare 2.1.2, FreeBSD since 2.2.5
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