How many static DNS servers does Sophos Firewall support?

Sophos Firewall supports the configuration of up to four static DNS servers. This capability allows administrators to specify multiple DNS servers for redundancy and reliability in name resolution. By configuring more than one DNS server, if one server fails or becomes unresponsive, the firewall can automatically switch to another DNS server, ensuring that network operations continue without interruption.

Having multiple DNS servers enhances the performance and resilience of the network, as clients can query other available DNS servers if their primary choice is slow or unavailable. Providing up to four static DNS options offers flexibility in network design, enabling the use of different DNS services, such as public DNS servers or internal DNS servers, based on the organization's needs. This is particularly useful in environments with high availability requirements.

Understanding this capacity helps administrators to better design their DNS settings within the Sophos Firewall to optimize their network's functionality and reliability.