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znypar's avatar
znypar
Aspirant
Feb 02, 2016
Solved

R7000 port forwarding not working while modem is in bridged mode

Hi guys, I have a R7000 wired directly to my NVG589 modem, which is running in bridged mode. It seems I am unable to forward any ports to servers I have running behind the router. (My primary goal ...
  • znypar's avatar
    znypar
    Feb 05, 2016

    Thanks for responding rpoffen,

    I did make sure to enable bridge mode (well, not true bridge, but IP passthrough).

    The R7000 was listing the public IP as NAT address.

     

    SO, I think I just stumbled on the cause. And it's a little bit embarrasing, but hopefully it will click for someone who changes their network structure like I did.

    On the server machine, I had manually assigned the IP, subnet, and gateway within the network adapter settings, due to limitations within the modem for its routing config.  When the topology changed, so did the gateway address, of course. I'm not sure how, but I had internet from within the machine for a time and also was able to access the machine from within the local network via the public IP in addition to its local IP (as explained before), so the IP was likely still passing through the modem's gateway... (for learning, I would be interested in someone explaining how this worked for a time)

    Prior topology: connection to the outside is: Modem -> POE switch -> (everything else, and router as access point)

    Current topology: connection to the outside is: Modem -> Router -> POE switch -> everything else

     

    Anyways, I assigned a static IP from within the R7000 for the server, set the server to automatic, and now things are solid and functioning as hoped.

     

    TLDR; Check your machine configuration, it might be conflicting with the router.  If you're trying to port forward to a specific machine and it isn't working, try forwarding to a different machine.