DNS could not be found

[Andreas Lilja]

Been getting this error (on browsers) on connected devices since I upgraded my router's firmware. It happens very rarely but it's annoying nonetheless. Tried turning it on and off again after 30 seconds, flushing DNS on the associated computers.

 

It's a Asus AC2400 RT-AC87U.

[brwainer]

In the DHCP server of your router you should be able to specify the DNS server IPs that get given out. Put in "8.8.8.8" and "8.8.4.4". These are DNS servers run by Google. The other option is to look up and use the DNS servers operated by OpenDNS. After putting this into your router, you will have to either reboot or renew the DHCP lease on your devices so they use the new DHCP addresses. 

 

What this does is makes your devices use DNS servers that are more stable and robust than whatever your ISP runs. If you continue to get DNS errors on your devices after this change, then that indicates that you are having packet loss issues, because DNS only uses UDP so if the request or response gets lost, you get "no response"

[Andreas Lilja]

26 minutes ago, brwainer said:

In the DHCP server of your router you should be able to specify the DNS server IPs that get given out. Put in "8.8.8.8" and "8.8.4.4". These are DNS servers run by Google. The other option is to look up and use the DNS servers operated by OpenDNS. After putting this into your router, you will have to either reboot or renew the DHCP lease on your devices so they use the new DHCP addresses. 

 

What this does is makes your devices use DNS servers that are more stable and robust than whatever your ISP runs. If you continue to get DNS errors on your devices after this change, then that indicates that you are having packet loss issues, because DNS only uses UDP so if the request or response gets lost, you get "no response"

Changing the DNS to Google on the router seems to work. Maybe ASUS changed the default one their firmware, I was 2 years or so outdated.

 

I only have a single line for the DNS tho, so it's 8.8.8.8 only. Apparently 8.8.4.4 is only a backup, if I'm reading things right.

[brwainer]

1 hour ago, Raskolnikov said:

Changing the DNS to Google on the router seems to work. Maybe ASUS changed the default one their firmware, I was 2 years or so outdated.

 

I only have a single line for the DNS tho, so it's 8.8.8.8 only. Apparently 8.8.4.4 is only a backup, if I'm reading things right.

The default isn't set by the router manufacturer, its set by your ISP. But ISPs are known to cheap out on their DNS servers and so responses either get dropped, or take a long time to be responded to.