Port forwarding

What is the manufacturer of your router so I can get a user guide and taylor the instructions if needed?

Generally I would statically address the device to be forwarded to. If your router address is 192.168.1.1 and Subnet mask of 255.255.255.0 and it's DHCP server controls address 192.168.1.100 for 50 leases to 192.168.1.149 then consider using the range 192.168.1.2 - 192.168.1.99 uniquely as static IP addresses. There are more starting at 192.169.1.150 but let's ignore them for now. In the network adapter to recieve port forwarded content assign a static IP address based on the above as say 192.168.1.15 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The DNS addresses should also be static however depending on your router there may be an option. Some routers allow their address to be entered as the DNS address and pass requests as appropriate to the DNS servers loaded in their lan configurations, otherwise you will enter your ISP supplied DNS addresses into the network configuration.

Now that we have established a stable IP address to forward the port to we need to tell the router everything it sees for port 5060 gets forwarded to IP Address 192.168.1.15 port 8000. If detailed instructions are needed I will need to know the manufacturer and model of your router.

Please provide the additional information and any questions in a response to this problem and I will respond when available.