dns issue

Hi!
i have a strange problem with my dns servers (from isp),

i ran hotspot service already 2years without problems,
but since yesterday it stops working.
i cannot ping the dns servers from mikrotik but from a simple windows machine i
can, so the server are active,
and all bypassed clients still have internet but hotspot user don’t,
i have configured primary and secondary dns and allow remote request

so, what can hang here, don’t know, can You help me?

thanks

When a user gets an IP from the Hotspot DHCP server, what DNS servers are they getting? Are they getting the propper DNS settings or not?

Greetings!

Check your dhcp server network settings.
/ip dhcp-server network
The dns IPs that the dhcp server uses are there. Insure they have not changed.