Isolated guest network also isolates from DNS server ... which prevents Wi-Fi client to use it
Hello,
In my network I have my internet provider, which is my gateway, 192.168.1.1.
I also have my DHCP and DNS server: 192.168.1.21. Its DHCP configures clients with gateway 192.168.1.1 and DNS as itself.
I also have a mix of Deco X90 and M9 plus as access points. There are running 2 Wi-Fi networks, my own one, as well as the guest network, running as isolated.
DHCP requests are working properly when Guest is isolated. For example smartphones get their IP address and their configuration, for gateway and DNS.
They can query the gateway. But the DNS queries are blocked.
If DNS server is configured as an external server, it works.
Here I don't know what to think: yes, it is more or less the main principal for isolation of networks. But then, why DHCP requests are authorized ? And if isolation only means requests for services other than basic one, why DNS requests are rejected ?
I do not know if many customers are running with this kind of configuration but being able to locally run a DHCP and DNS server should be supported on both networks, isolated or not.
Let me know what you think of it !