pfSense

Ermal Luçi wrote:

A setup with multiple WANs can losse its default route when its gateway is marked as down from apinger.
This results in a system non-functional for some services running on pfSense itself and that are not handled by a PBR.

A fix was committed https://rcs.pfsense.org/projects/pfsense/repos/mainline/commits/1d60ed9bb4901c5b85813d0dab32630e8a135d41
to provision this as a workaround for 2.0

I've insert this issue as feature(http://redmine.pfsense.org/issues/1411) but i think can be correlated at your post.

Another improvement was committed related to this.
It now considers gateways that are not marked as default in the GUI.