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LadyLegend's avatar
LadyLegend
Aspirant
Nov 10, 2018
Solved

Double Nat R7000 and n450

I am computer literate, however, network illiterate. I'm going to explain my issue as best and simply as possible.   I have the following devices and the following attached to said devices:   ...
Installation
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  • myersw's avatar
    myersw
    Nov 10, 2018

    if the Netgear N450 modem/router is still acting as a router then the r7000 should be configured as an AP. Unless the N450 is configured as bridge only it is also a router so connecting the r7000 as a router causes the double nat. So either change the N450 to bridge or change the r7000 to AP. 

michaelkenward's avatar
michaelkenward
Guru - Experienced User
Nov 11, 2018
LadyLegend wrote:

>Netgear N450 modem

 

Yes, but which N450? N450  is a speed designator, not a Netgear model number. It just tells us that you have a now slightly old device with yesterday's wifi technology.

 

CG3000Dv2? That's the only "modem", or Gateway, with that label.

 

 

 

  • LadyLegend's avatar
    LadyLegend
    Aspirant
    Nov 11, 2018

    michaelkenward wrote:

    LadyLegend wrote:

    >Netgear N450 modem

     

     

    CG3000Dv2?

     

     

     Yes. that is the correct model of modem I have.  Sorry about that.

     

    • michaelkenward's avatar
      michaelkenward
      Guru - Experienced User
      Nov 11, 2018

      That is a router. So heed the words of myersw.

       

      I see no built-in "modem only" mode for this device. So using the R7000 in AP mode may get rid of the "double NAT" issue.

       

      Posting in the appropriate section might also yield better advice:

       

      Cable Modems & Routers - NETGEAR Communities

  • HiSpeed's avatar
    HiSpeed
    Guide
    Nov 11, 2018

    Hi,

     

    It is possible to cascade 2 NAT routers but, to work properly, the first needs a DMZ to second, and a firewall off...

     

     

    • myersw's avatar
      myersw
      Master
      Nov 11, 2018
      HiSpeed wrote:

      Hi,

       

      It is possible to cascade 2 NAT routers but, to work properly, the first needs a DMZ to second, and a firewall off...

       

       

      What is needed is for the one to be an AP. That basicly sets fiirewall off, but only part of the puzzle. Also need to get the dhcp from the DMZ router and also point at it for DNS lookups. Easier to just set to AP mode and let the firmware handle things. Have done what you are suggesting, I think, on DD-WRT, but see no reason to muck around when there is a setting. 

    • michaelkenward's avatar
      michaelkenward
      Guru - Experienced User
      Nov 11, 2018
      HiSpeed wrote:

      Hi,

       

      It is possible to cascade 2 NAT routers but, to work properly, the first needs a DMZ to second, and a firewall off...

       

       

      Yes, but why bother when there are easier options?

       

       

       

       

       

      • HiSpeed's avatar
        HiSpeed
        Guide
        Nov 12, 2018
        michaelkenward wrote:

        Yes, but why bother when there are easier options?

         

        In France, the (first) modem-router is generally provided by the ISP (named Box) because of VoIP and IPTV capabilities not existing into commercial modem-routers.

        Often these Boxes can't be bridged, obliging a double NAT if a powerful commercial router is used for other reasons (better network control, better wifi, etc.)...