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Forum Discussion

xadd's avatar
xadd
Tutor
Apr 06, 2022

EX7300 and R7800 : Certificate Error (Server identity can't be verified)

Hi,   I have a R7800 router and EX7300 extender.    Regularly, I have an error message on IOS device "The Server identity can't be verified". This message is not linked to a specific site, even i...
plemans's avatar
plemans
Guru - Experienced User
Apr 06, 2022

are you getting it while trying to log into the router or extender? 

Or when visiting sites? 
If its visiting sites, try disabling apples random mac/ip address feature. 

xadd's avatar
xadd
Tutor
Apr 06, 2022

The Private WI-fi Address is disable on all my devices. 

 

I must say that the problem appear on several distinct devices

 

Thank you for your help

  • plemans's avatar
    plemans
    Guru - Experienced User
    Apr 06, 2022

    1. what modem/gateway is the router connected to? 

    2. what firmware is on the router? 

    3. what firmware is on the extender? 

    4. when does it happen? When connected to the router? when connected to the extender? Details are key

    • xadd's avatar
      xadd
      Tutor
      Apr 06, 2022

      HI,

       

      The Router is connected to a TPLink TL-R470T+ Hub, connected to 4G Box

      The R7800 router's firmware is V1.0.2.90

      The EX7300 Extender's firmware is 1.0.0.146

       

      I don't really know what is the connexion when it happens. It seems both was I'm either closer to the router or the extender..

       

      Thank you

      • plemans's avatar
        plemans
        Guru - Experienced User
        Apr 06, 2022

        the tplink is its own router. It causes a double nat if you're running that and the netgear in router mode. 

        A double nat happens when you cascade more than 1 router.
        https://kb.netgear.com/30186/What-is-Double-NAT
        Fixes? There’s 3 options but only use 1.
        1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions. Kind of pointless with a load balancing router like the tp-link. 
        2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
        3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
        https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-Mode