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) 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.
Quote from: Sandyman on February 25, 2026, 06:55:10 PMHello
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 FNF (https://fnffree.io)) 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.
Yes, that should work. You can keep the two sites on separate subnets and route between them over the wireless bridge, then use Site A's cellular connection as a failover gateway for Site B if its FTTP link goes down.
Quote from: Sandyman on February 25, 2026, 06:55:10 PMHello
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 (https://fivenightsatfreddysgame.io/)) 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.