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79 posts

Master Geek


# 201822 5-Sep-2016 12:34
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I've seen a few people here have problems with virtual servers/port forwarding on the NetComm NF4V router but haven't found anything that helps me.

 

I'm on BigPipe but I don't think that's relevant (or is it?). I don't have a fixed IP address (but thinking about it) though, again, that shouldn't matter in this case. If I add a virtual server entry, canyouseeme.com can't see the port is open. I've noticed that entries are added automatically (e.g. when Skype starts) but even those port don't appear to be open (though Skype works fine). I've tried re-booting the router.

 

I was wondering if I need to do more than just add a virtual server entry, for the port forwarding to work (I've also tried getting to the port from another external network, without success), though, as I say, Skype works fine, even though I can't see those Skype ports open.

 

One odd thing I noticed (though it's probably odd due to my limited knowledge) is that the IP address noted by canyouseeme.com (and other similar sites) is not the same as the IPv4 address shown in the Device Info/WAN section of the router, though that one also doesn't work. I've also just tried pinging the external address(es) from another network and don't get a response.

 

Any thoughts gratefully received.

 

Tony


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3344 posts

Uber Geek

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Vocus

  # 1622984 5-Sep-2016 12:36
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I'm on BigPipe but I don't think that's relevant (or is it?)

 

Very relevant.  BigPipe (unless you go fixed IP) use CGNAT, so the IP shown outside isn't the IP assigned to your router.  If you really need virtual server / port forwarding then the answer is to get a fixed IP.  There should however be no need just to use Skype.




79 posts

Master Geek


  # 1624114 5-Sep-2016 16:28
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ubergeeknz:

 

I'm on BigPipe but I don't think that's relevant (or is it?)

 

Very relevant.  BigPipe (unless you go fixed IP) use CGNAT, so the IP shown outside isn't the IP assigned to your router.  If you really need virtual server / port forwarding then the answer is to get a fixed IP.  There should however be no need just to use Skype.

 

 

Ah, something inside told me it might be relevant, but I didn't want it to be. I didn't know CGNAT was used but that explains it. I guess I'll need to get a fixed IP, then. I only mentioned Skype because, as it worked and got virtual server entries added automatically, I thought that virtual servers were all I needed to define. Anyway, I also just got a response from BigPipe that I need a fixed IP address for this to work, and that's what I'll be getting.

 

Thanks ubergeeknz!


 
 
 
 


4204 posts

Uber Geek


  # 1624303 5-Sep-2016 22:28
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Those 'virtual servers' entries were created by UPnP. The netcomms just choose to show the dummy rules in the table. There is no need for you to manually add them.

I'm surprised Skype won't work with CGNAT, but then again it is still just another layer of NAT to break things.



79 posts

Master Geek


  # 1624307 5-Sep-2016 22:46
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I'm surprised Skype won't work with CGNAT.
I don't think that's what ubergeeknz was saying, only that I wouldn't need a fixed IP address just to use Skype. I'm not expecting Skype not to work and hope it will.


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