General Teltonika Router Settings
From Bondix Wiki
General Router Settings
Load Balancing
Check that Teltonika Load Balancing functionality is deactivated on the router, as this would have a negative impact on Bondix S.A.NE performance and functionality.
DNS
Ensure that you have configured DNS forwarding to a public server like 8.8.8.8 or 9.9.9.9 to receive DNS through the tunnel.