[sr-dev] [kamailio/kamailio] usrloc keepalive: with r2 enabled, registrar configured with usrloc keepalives will send OPTIONS to received param of first hop (#2447)

[Daniel-Constantin Mierla]

You do not need that to be 1 if you want to use Path for routing, only if you want to bypass the intermediary proxy doing Path.

IIRC, the nathelper module has (or had) a mode to spoof source IP and then it could send UDP NAT keepalives pretending to be the intermediary proxy to received address set in this way.

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