wrote: wrote: wrote: I've set DNS 1 as loopback and second DNS as 1.1.1.1 in the DHCP scope options.
That could be a problem -- don't use the router loopback as a DNS server. Follow this guide: EdgeRouter - DNS Forwarding Use two publicly accessible DNS servers like 1.1.1.1 and 8.8.8.8 or use your ISP provided servers as desired.
I thought you had to set the loop back address to allow dns server on the edgerouter to work correctly.
OP didn't share config, so I made some assumptions and qualified my response with 'could' -- then suggested a relatively easier config to implement.