Change WAN based on RTT/Ping

[inkeliz]

I currently have three WAN connections. My primary goal was to use them for failover and basic load balancing.

However, I've noticed that latency and routing change between ISPs on a weekly or monthly basis. Some ISPs have terrible routes to specific servers, especially international ones (for example, Brazil ↔ Europe). I'd like to know whether OPNsense can automatically switch the WAN based on latency.

Does OPNsense provide a feature that can continuously ping a set of IP addresses and choose the WAN with the lowest latency?

For example, consider three WANs: WAN_A WAN_B, and WAN_C.

The idea would be:

* WAN_A → ServerSaoPaulo = 170 ms
* WAN_B → ServerSaoPaulo = 230 ms
* WAN_C → ServerSaoPaulo = 123 ms

In this case, I would want all connections to ServerSaoPaulo to use WAN_C* OPNsense should only switch to WAN_A or WAN_B if WAN_C experiences high latency or significant packet loss.

For connections to ServerSomewhereElse: any of the WANs can be used.

[meyergru]

You can use gateway groups for that and use specific trigger levels - it is in the official docs.