Connecting SIP Phone over Internet

[Tinos]

Good day.
I have a Panasonic KX-HTS32 with WAN1 configured with IP address 192.168.1.2 and default gateway 192.168.1.1 which is a Firewall IP address. The Firewall has NAT port forwarding done for the public IP address 169.200.1.101(not the real public IP) as below:
169.200.1.101:8080 -> 192.168.1.2:80
169.200.1.101:5060 -> 192.168.1.2:5060
169.200.1.101:12000-20000 -> 192.168.1.2:12000-20000
Locally all HDV1xx SIP phones on the 192.168.1.0 subnet register and connect fine. When one of the HDV1xx that connects fine when on the 192.168.1.0 subnet is moved to a remote site which connects back to main site via internet is connected it is stuck on "Registering" despite the Registrar and Proxy Server Ip address was manually changed to 168.200.1.101 on the phone.
What could be missing for the phone to connect?

 

[gbaughma]

So is 192.168.1.2 the PBX?
From reading your post, it looks like you're doing things a little... backwards.
Let's look at the scenario like this:

Remote connection (say, a home)
Internal IP address --> 192.168.1.0/24
IP Address of phone: 192.168.1.2

Local connection (With the PBX)
PBX Address: 192.168.0.2 (whatever local address for the PBX)

On the router, on the "PBX" side... you would port forward from WAN to
192.168.0.2:5060
192.168.0.2:12000-20000

So... from external to the PBX on those ports.

Also note... this is VERY insecure. It's *MUCH* better to set up a VPN (if the phone supports it) into your network... otherwise you're going to almost INSTANTLY get hackers knocking on port 5060 trying to get into your phone system.

... or set up VPN tunneling from the router at the remote site into the router at the local site.