Hi,
imagine I have a node C behing a firewall contacting a public node P by means UDP. In this way, C opens a hole for P to reply back within a timeout (the C's hole timeout).
I was wondering what is the most commonly found behaviour for firewalls/routers in the case when is just P that from this point sends datagrams to C (unidirectional communication P-->C): does C's firewall/router drop the communication after a timeout, or does it "refresh" the hole at every incoming datagram from P?
Thanks a lot in advance.
Best regards, Alessio Pace.