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This custom cable modem my ISP gave to me does not support forwarding an external port to a different internal port. (For example, I can't forward an incoming connection on port 80 to port 3389 on my main box and and an incoming connection on port 21 to port 3389 on my old box. I need to do this to avoid port blocking.)
I know I could go around this by changing the port of RDP on my machines but I can't because I already have an HTTP server which must run on 80 for internal testing purposes.
I could not find any software updates, I could not get any support from my ISP and I could not find any better cable modems. (Cable modems are very uncommmon compared to ADSL modems.)
So is there any way I can go around this limitation?
Can you put your own router and switch in between your computers and the modem? – Shane Wealti – 2012-02-02T22:43:22.663
How will that work? I don't know how to setup such a network. I have a Linksys WAG160N which was my old ADSL modem. Could that work? – AlicanC – 2012-02-02T23:04:30.433
1shane is kind of right.. If you put something in the middle, the thing should be a Plain Router, not a Modem/Router device(i.e. not a router with modem built in). A plain Router instead of an adsl modem built in, has an ethernet socket labelled WAN, and that's where you use a cat5 cable to connect your modem to it. – barlop – 2012-02-02T23:23:54.893
Actually you can possibly use an adsl router for that. You use a cat5 cable to connect the modem to a regular port on your modem/router. – barlop – 2012-02-02T23:25:10.510
My old ADSL modem doesn't have it. (Because why would I connect another modem to it right? :P) So should I get something like Linksys E1200? – AlicanC – 2012-02-02T23:29:24.037
@AlicanC: I've yet to see an ADSL modem that does not have an Ethernet port... – user1686 – 2012-02-03T00:44:28.340
@grawity, I meant the WAN port. – AlicanC – 2012-02-03T11:32:43.497