My question is related to router port forwarding.
If I have a router that is "supposed" to be port forwarding certain TCP/UDP ports 6000,6100,9000,9001,30000-30031 forwarded from the WAN side to a fixed internal LAN Ip address 192.168.0.200, how can I check that those ports are being forwarded properly?
The destination is a VoIP phone system and is not a PC.
I had an Idea that I could set up a Telnet server on a PC and put it on the destination address temporarily in place of the Voip System & set it to accept connections on the above ports.
Then go off site and manually telnet into the server on those ports, one at a time.
If I can do this, the ports must be forwarded correctly?
Maybe even do a file transfer to see if it works reliably?
Is there an easier way to do this?
Is there a program/tool that can do this type of testing?