[Freeswitch-users] Multiple network interfaces, can't force freeswitch to use one.

[Eugene Shcherbatyuk]

Hi Joshua,

I am afraid your dumps are a bit strange. That is:

-- SIP session at your public address is fine;
-- there are only outgoing RTP packets from your public address and no
packets to it in the first dump;
-- the other dump shows only incoming T38 packets to your public interface;
-- none of dumps shows sip/rtp traffic on your internal address (eth0);
-- dumps show Internet (dns, ntp) traffic on your internal interface;
-- your 'public' address actually belongs to 'disconnected' network,
which is not routed in the Internet, but dump show connection with real
public addresses, that is there is NAT on the way;

That makes me suspect that problem is within network configuration and,
probably, FreeSwitch NAT traversal configuration. It seems the problem
is not that FreeSwitch uses wrong address for I can not notice a sign
for the case in your dumps.



On 30/06/12 01:45, Joshua Nankin wrote:
> Hi Eugene.
>
> So, you are correct, I have configured my network to forward SIP and RTP
> traffic to my 192.* IP, and this is working as intended.  I have also
> now manually put in the 192.* IP into the sofia external.xml and
> internal.xml for sip-ip and rtp-ip.
>
> Again, on this virtual machine there are two interfaces (eth0=10.* ip,
> and eth1=192.* ip).  After restarting freeswitch and doing the lsof -i
> that you suggested, I get the following for freeswitch:
>
> freeswitc 17227 freeswitch   23u  IPv4  61949      0t0  UDP
> 192.168.1.10:5080 <http://192.168.1.10:5080>
> freeswitc 17227 freeswitch   26u  IPv4  61950      0t0  TCP
> 192.168.1.10:5080 <http://192.168.1.10:5080> (LISTEN)
> freeswitc 17227 freeswitch   30u  IPv6  61957      0t0  UDP
> ip6-localhost:5080
> freeswitc 17227 freeswitch   31u  IPv6  61958      0t0  TCP
> ip6-localhost:5080 (LISTEN)
> freeswitc 17227 freeswitch   35u  IPv4  62707      0t0  UDP
> 192.168.1.10:sip
> freeswitc 17227 freeswitch   36u  IPv4  62708      0t0  TCP
> 192.168.1.10:sip (LISTEN)
> freeswitc 17227 freeswitch   37u  IPv4  61960      0t0  UDP
> 10.0.2.15:33908->chic-cns.area4.il.chicago.comcast.net:domain
> freeswitc 17227 freeswitch   40u  IPv4  61964      0t0  TCP
> localhost:zope-ftp (LISTEN)
>
> I'm not sure where that 10.0.2.15 is configured in freeswitch, or even
> what that port is for.
>
> So, below I've linked to two packet captures for both eth0 and eth1.
>   You'll notice that the intial INVITE is occuring on eth0, but that
> we're receiving traffic from the sip provider on eth1 that is not being
> responded to by freeswitch.  I still can't figure out why that is
> happening (both why eth0 is even being used, and why freeswitch is not
> responding to traffic directed at the other IP).
>
> http://joshnankin.com/tcpdump0.pcap
> http://joshnankin.com/tcpdump1.pcap
>
> Thanks again for all of your help.
>


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