DNS Filter is the feature to filter HTTPS websites by examining and intercepting the DNS queries. Some network administrators may set up a local DNS server for private domains and force LAN clients to use the internal DNS server. In this scenario, they will find DNS Filter won’t work. It is because the router will not receive the DNS query since DNS query and response are between LAN client and the local DNS server directly.
To use a local DNS server and DNS filter function at the same time, we suggest:
Go to LAN >> General Setup page, click Details Page of LANx, enter a public DNS server IP for LAN DHCP clients.
Go to Applications >> LAN DNS / DNS Forwarding page, click an index to create a LAN DNS Forwarding profile.
After finishing the above configuration, the DNS queries from LAN clients will be handled by the router. DNS Filter can work to filter the HTTPS websites, and the DNS Forwarding will forward the queries for internal domains to the local DNS server. So the LAN clients can access the local server by hostname and be inspected by the DNS Filter at the same time.
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