[OpenSIPS-Users] udp or tcp for nat traversal?

[george wu]

My experience is for two uac (linphone) behind a firewall,
tcp/tls will always work.
udp will never work.

for both tcp/udp, my uac will send keep alive every 10 seconds.
I don't understand what makes those difference.
Can any one  share your experience?

George Wu

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