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Forum Discussion

Sil68's avatar
Sil68
Aspirant
Nov 09, 2015

Connection drops/connection timeouts with Netgear FVS381N

Hi,   Just recently I've switch ISP (to a cable provider), and in doing so my infrastructure changed accordingly. Now I've got a cable modem (technicolor TC7200U) linking my LAN to the big wide wor...
Installation
Troubleshooting
DaneA's avatar
DaneA
NETGEAR Employee Retired
Nov 15, 2015

Hi Sil68,

 

Have you tried to open ports in the Technicolor TC7200U such as ports 443 and 80 and point it to the IP address of the FVS318N?

 

If ever opening ports will still not help then you may want to consider the recommended network setup that I have mentioned previously on one of my responses to you wherein the Public WAN IP Address should be registered to the firewall which is the FVS318N making it the main router in order to isolate the problem.

 

 

Regards,

 

DaneA

NETGEAR Community Team

Sil68's avatar
Sil68
Aspirant
Nov 16, 2015

Hi DaneA,

 

Thanks for the hint; I've now setup port forwarding for ports 80 and 443, and indeed it bring some kind of relief to the issue at hand, but I'm afraid it still is not solved yet.

 

Interestingly about 4-5 times out of 10 executing a google search, click on one of the results works as intended, but the other times it's ending up in a timeout/server not responding (before opening ports 80 and 443 it was only 1-2  out of 10).

 

Regards,

Martin

  • DaneA's avatar
    DaneA
    NETGEAR Employee Retired
    Nov 16, 2015

    Hi Sil68,

     

    The reason for this is because you have a Double NAT scenario since you have two routers cascaded.  You may want to consider the recommended network setup that I have mentioned recently on one of my responses to you wherein the Public WAN IP Address should be registered to the firewall which is the FVS318N. Thus, making it the main router.

     

     

    Regards,

     

    DaneA

    NETGEAR Community Team

    • Sil68's avatar
      Sil68
      Aspirant
      Nov 17, 2015

      Hi DaneA,

       

      I've tried to de-activate NAT on the FVS318N--just out of sheer curiosity--, but I coudln't notice and difference.

       

      As for configuring the TC7200U in CM mode only, albeit it is outlined in the user manual how to accomplish this, the admin UI of my modem is lacking this feature (at least I failed spotting it in there).

       

      Regards,

      Sil68

      • DaneA's avatar
        DaneA
        NETGEAR Employee Retired
        Nov 17, 2015

        Hi Sil68,

         

        How did you deactivate NAT on the FVS318N?  Did you enabled Classical Routing?

         

        Have you tried to consult and asked assistance from your Internet Service Provider on how to set the TC7200U as a modem-only device?

         

         

        Regards,

         

        DaneA

        NETGEAR Community Team

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