I have a wireless cable modem that uses a telco return. For this I have a program called CCMInfo. This program controls the cable modems dial function.
When the IP of my PC is in the same subnet as the cable modem, the program works fine. When the IP of the PC is in a different subnet, it no work.
I opened the live filter log and can see where the source (my PC) has a port of 7778. And my PC is listening on this port. Also the destination is 255.255.255.255 on port 7777.
I created two new services. One is CCM_OUT using 7777 for the dest port. Then a second called CCM_IN using 7778 for the dest port.
I also created a name for the cable modem and one called broadcast. Broadcast is for finding the cable modem.
I added a filter rule to allow any internal PC out on Broadcast port CCM_OUT (255.255.255.255/7777).
Now that rule stoped the errors in the live filter log. So I moved on to the NAT and tried every possible configuration I could think of. But I can not get the PC to talk to the cable modem.
I assumed I could just say look for source (My PC on eth1) looking for Broadcast (255.255.255.255) on service CCM_IN (7778), change Source to eth0 with service CCM_IN (7778) and change Dest to Broadcast on service CCM_OUT (7777).
I assume this will let the packet out, but what do I do for the return packet? I tried NAT again to look for packets from the cable modem for service CCM_IN (7778) and change the Dest to my PC on the same service. But it still will not work.
FYI, CCMInfo is a program from Hybrid for their wireless cable modems with telco return. When running, it loads to your systray with 3 icons. One is a modem, 2 is a phone and 3rd is a globe. THe globe is for DNS. The phone shows the state of the dail modem and the modem shows the state of the cable modem. Green means ok, red is bad. A white cable modem just sits there trying to initiate a network connection.
I assume the program is trying to initiate a connection with the cable modem on port 7777 and waiting for the reply on port 7778.
Also, this is a UDP protocol. And I even tried dnating anything from the cablem modem to my pc. I even deleted the filter rules and never see the cable modem trying to come back.
Any and all help appreciated.
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