notes/projects/radiochemie/opnsense-on-sophosHW-multi_wan.md

Specific

In our setup we won't use Failover as the second WAN is primarily such that it has access to the Campus GA-network (192.157.165.0/24 ? )

General

Multi WAN

Multi WAN scenarios are commonly used for failover or load balancing, but combinations are also possible with OPNsense.

Configure Failover

To setup Failover the following steps need to be taken:

1. Add monitor IPs to the gateways
2. Add a gateway group
3. Configure DNS for each gateway
4. Use policy based routing to utilize our gateway group
5. Add a firewall rule for DNS traffic that is intended for the firewall itself