For Internet domain names resolution UserGate Server provides two opportunities: DNS requests redirecting (forwarding) and NAT rules. Responses from DNS forwarding requests are cached, thereby speeding up frequently requested domain name resolutions. DNS forwarding settings are available in “Services – DNS Forwarding” of the Administration Console where you can specify one or several DNS servers where UserGate will forward client DNS requests. By default, DNS forwarding is disabled (Fig.13). In this case UserGate proxy servers will use the DNS servers specified in the network settings on workstation with UserGate installed
Figure 13. DNS settings.
A NAT setup creates a NAT rule for port 53 UDP, which can be applied to all or some users. In this case you should specify the “Internet provider’s DNS IP” as the DNS server on client workstation.