I’ve been noticing the router out of the blue drops all wifi and lan connections and in about 1minute come back online. Both the guest and non guest wifi go away. The problem seemed to start after a couple of months after setting it up. I have about 24 devices connected. Any suggestions or questions welcome..

what modem/gateway is it connected to? What firmware is on the router? When it happens, have you checked to see if the router is rebooting, if its internet light is down, or what actually is happening with it? Do connections say "connected, no internet", do they disconnect from the wired/wireless connection entirely? What actually happens? Is it happening after the same amount of time each day (maybe lease time?)

Connected to att modemFirmware V1.2.3.2.8It doesn’t appear to be the internet, the wifi and lan connections drop. Wifi does show wifi id anymore. After about a minute, they appear again. Lan, shows no connection. The logs don’t show a reboot, and modem and router lights look fine as far as can tell.I do see a message about ‘dos’ in the log . Maybe there’s an attack going on?I’ll check the lease time .

ATT tends to use modem/router combo devices. It causes a double nat. A double nat happens when you cascade more than 1 router. https://kb.netgear.com/30186/What-is-Double-NATFixes? There’s 3 options but only use 1. 1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions. 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 interference3. 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

I’m ahead of you on that one. I have the modem setup in dmz mode. The wifi is disabled on the modem or off. The nat is open. I am using ipv6 instead of ipv4. It’s been working well but not so much in the last month.

Lease time is 10minutes. Seems pretty short

RAX120v2 Drops wifi and lan connection

15 Replies

plemans
Guru
Dec 26, 2021
what modem/gateway is it connected to?

What firmware is on the router?

When it happens, have you checked to see if the router is rebooting, if its internet light is down, or what actually is happening with it?

Do connections say "connected, no internet", do they disconnect from the wired/wireless connection entirely? What actually happens?
Is it happening after the same amount of time each day (maybe lease time?)
- Simon95132
  Aspirant
  Dec 26, 2021
  Connected to att modem
  Firmware V1.2.3.2.8
  It doesn’t appear to be the internet, the wifi and lan connections drop. Wifi does show wifi id anymore. After about a minute, they appear again. Lan, shows no connection. The logs don’t show a reboot, and modem and router lights look fine as far as can tell.
  I do see a message about ‘dos’ in the log . Maybe there’s an attack going on?
  
  I’ll check the lease time .
  - plemans
    Guru
    Dec 26, 2021
    ATT tends to use modem/router combo devices.
    
    It causes a double nat.
    
    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.
    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

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RAX120v2 Drops wifi and lan connection