Router/Firewall Port Forwarding - Panasonic KX-HTS Series Setup Reference Manual

(8) Router/Firewall Port Forwarding

OPTION message will be sent continuously from LCR, if necessary configure the following.
For External router setup, configure Port Forwarding on the router as follows:
udp port 5060 – to HTS WAN1 IP address (e.g. 192.168.22.99)
udp port range 12000-20000 (RTP) – to WAN1 IP address (e.g. 192.168.22.99)
IMPORTANT!
To secure the PBX from illegal attacks, please restrict the above port forwarding ports to only
be accessible from the LCR Telecom source IP addresses.
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