Hello Brian, I don't think there is NAT relation between these two subnets (192.168.50/24 and 192.168.60/24) because hosts that reside inside 192.168.60/24 are accessible from 192.168.50/24. I've attached a sofia_trace.zip file with output with sofia loglevel all 9 enabled. From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Brian West Sent: Tuesday, September 29, 2009 8:04 PM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] Multiple Subnets Maybe your router isn't really a router and is doing NAT behind NAT? Need logs and sip traces because we would only be guessing at this point. /b On Sep 29, 2009, at 10:52 AM, Andrey Nepomnyaschih wrote: Hello, I have some problems running a FreeSWITCH with endpoints located in different subnets. For example a FS is listening at 192.168.50.14/32 and endpoints from the same (192.168.50.0/24) subnet work as expected. But when I try to receive a media from an endpoint located at different subnet, let's say 192.168.60.0/24 the RTP stream cannot be bridged. FS sends an INVITE message asking endpoint to send media to external interface. Can anyone give me a hint where to look on how to overcome such behavior? Kind Regards, Andrey Nepomnyaschih