Date: Tue, 17 Jan 2012 23:43:15 +0100 From: Maciej Milewski <milu@dat.pl> To: freebsd-net@freebsd.org, Matthias Apitz <guru@unixarea.de> Subject: Re: PPP to UMTS provider && incoming traffic (TCP, UDP) Message-ID: <1784936.VLDeoQkidl@snifi> In-Reply-To: <20120117190847.GA1255@tiny> References: <20120117190847.GA1255@tiny>
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Dnia wtorek, 17 stycznia 2012 20:08:48 Matthias Apitz pisze: > 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; I observed similar problem with L2TP VPN and for me it looks that they are blocking incoming/returning UDP traffic in public APN. On the server side I see both incoming and outgoing traffic but device complains that it's unable to connect. If I switch to local wireless network then everthing works fine. I suspect that's because they are selling special(money) APNs. > as well I checked incoming TCP, for example incoming SSH or HTTP; it > seems that incoming UCP/TCP is just not coming through the PPP link; > > before bother (complain) the provider with this, I wanted to ask if I > miss something in the PPP configuration to get incoming delivered; > > note: I'm not talking about NAT to some stations on a LAN, I just want > get IP to the local host (interface tun6); as well I disabled ipf(8) > which I have configured normaly; > > any ideas? thanks in advance > > matthias -- Maciej Milewski
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