Hi,
These errors appear to be related to the router's own DNS configuration.
The next time the issue occurs, please SSH into the router and run the following commands:
cat /etc/resolv.conf
nslookup google.com
If DNS resolution fails, please try the following and see if this help:
- Go to LuCI → Network → Interfaces and edit the corresponding WAN interface.
2.Manually change the WAN's DNS settings to another available public DNS server.
In addition, under the current network environment, connectivity to the Quad9 upstream DNS configured in AdGuard Home appears to be unreliable.
Please try switching to another public DNS provider and see whether it helps, for example:
- Google:
8.8.8.8 - Cloudflare:
1.1.1.1