Wednesday, December 11, 2019

UDP NAT timeout 3 days

A VOIP provider who provides/manages 2 x on-prem PBXs at our 2 sites has asked us to increase the UDP NAT session timeout on our routers from 180s to 259200s (3 days) to try and resolve some issues we are facing with calls not forwarding to internal extensions between the two sites.

Does this sound like a reasonable thing to ask? My concern is that UDP nat session table will fill up and cause unintended consequences.

If it helps, both devices are SMB type fortigate/draytek routers with < 100 clients at each site.
Any input greatly appreciated. Thank you.



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