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1846 posts

Uber Geek

# 198141 28-Jun-2016 09:29
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I've been trying to get port forwarding to work on my Vodafone supplied TC7210d cable modem but for the life of me can't get it working.


I followed my nose and got things set the way I wanted but no luck there. Then I looked around at guides, and they all matched what I had done. I removed them all anyway, and tried again following this guide, but still no luck.


Online port checker tools show all the ports as being closed, which is confirmed when I try and access the service.


I have (for example) on my local network and I map it to the external port 38. But all I get is connection failed.


Am I missing something completely obvious? Do I need to play with the firewall, too? I'm sure my last modem was as simple as pie to get this working.

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1978 posts

Uber Geek

  # 1581729 28-Jun-2016 10:04
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"Am I missing something completely obvious?"


Yes. Some ISP supplied routers have issues with port forwarding. Its been like that since forever .
Some ports may forward, others wont . Just the way it is with some of these.
With some ISP routers , Even a DMZ wont forward all ports(from experience) . I guess its because of the custom Firmware ISPs use (?)


Simple fix, buy another. It will just work.



1846 posts

Uber Geek

  # 1581768 28-Jun-2016 10:33
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With the vodafone cable network you cannot just buy another. You have to use the supplied modem. I guess i'll try some other ports and see what happens. Ideally I don't want a machine in a DMZ, but wonder if I can setup a Pi to sit in the DMZ and forward ports itself. Google here I come.


467 posts

Ultimate Geek

  # 1581830 28-Jun-2016 12:15
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As above it's usually the ISP router that is at fault but what I do to test is use a local utility to port scan my local host(s) and confirm that I can see the port open from within my lan, if that doesn't work then you usually have a firewall issue on the local host.


Once that's sorted then I setup the port forwarding and use one of the online port forwards to confirm that it's working okay.





1846 posts

Uber Geek

  # 1582376 28-Jun-2016 22:13
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FYI - I have it working with the firewall set to Low as any settings higher than that start to restrict the available ports that can be opened.


For good measure I also added both my remote machines mac addresses to the trusted list, but i'm not sure if this is required to get the ports to open nicely.

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