This document describes how to set up a DNS loopback address to send DNS requests from a specific source address.
This is useful for environments where DNS requests are sent over a VPN connection. With this type of configuration, a DNS request may be sent from an interface without being checked by a VPN rule. The DNS request will not reach its destination.
2.2) Add a new entry.
3) Exception: The DNS server can be reached via a routing entry with an assigned routing tag:
If a routing tag is assigned to a routing entry (in this example the tag 5), this tag must be entered in DNS forwarding and in DNS Loopback.
3.1) Create an entry for DNS forwarding as explained in step 1) and enter the IP address of the DNS server followed by an @ and the routing tag (e.g. 192.168.1.1@5, if the routing tag 5 is used).
3.2) Create an entry for a DNS Loopback address as explained in step 2) and enter the IP address of the DNS server followed by an @ and the routing tag (e.g. 192.168.1.1@5, if the routing tag 5 is used).