Hi to All


A newbie question: I have two android linphone clients in two separated
private lans behind Nats. The configuration is something like this:



Android1 --- Time Capsule (bridge) --- Router --- >    INTERNET    < --
Router --- Time Capsule (Bridge) --- Android2



The time capsules are bridges, so they are not suppose to do any NAT. When
android1 calls android2, android2 receives the call notification but when it
answers, no response is received on android1 (so it continues to ring). If
android2 tries to call android1, the call doesn't even reach. (linphone
closes)



If the caller client cancels the call, the cancel is detected on the
receiving device.  In the receiving  android log the “Via” header has the
correct public IP of the caller. It seems the problem is the NAT/firewall
transverse of the caller's lan.



So if the receiver android "rings" when called, but its “answer” is not
detected by the caller; does this means that the blocking occurs when the
UDP of the audio/video RTP is trying to being established?  Or it's blocked
at the SIP UPD session establishment?


 I'm using the sip.linphone.org service, and the version of the android
linphone is 1.1.4


Thanks very much in advance
Kind Regards
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