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Hello
I look after two sites in a relatively remote area, they are about 1km apart.  Both sites have relatively high speed FTTP links (c. 300Mbps).  It is possible to install a wireless bridge between the sites.  It would be beneficial to install a cellular WAN, because cars frequently take the telegraph poles out causing weeks of outage!  However, only one site (site A) has cellular coverage. 

Assuming that both site A and site B have OPNsense units, that a wireless bridge link (WBL Fnaf) is available, say using a TP-Link EAP215, and a cellular WAN at site A.   

Is the following possible with OPNsense?
•    Allowing the sub nets at site A and site B to communicate using the WBL
•    Allowing site B to use the cellular WAN in case of FTTP failure at site B

If so, could you give me a pointer as to the features / configuration to explore?

Is there an easier way, perhaps I have missed something obvious?


Thank you in advance.

Thank you for taking the time to explain what you're trying to achieve. I ran into a similar setup when connecting two locations and found that separating the site-to-site VPN rules from the WAN failover configuration made troubleshooting much easier. OPNsense can handle both, but the exact approach depends on how your VPN and cellular connection are configured. A pointer to the right features would be much appreciated.