Messages

When pinging from the host (A) behind OPNsense to the Host (B) behind the Linux TS subnet router, I receive the traffic on host B, it replies and I see it leaving the Linux TS subnet router. However, I do not see the reply on the OPNsense TS interface, therefor never reaching host A.

When pinging from the host (B) behind Linux to the Host (A) behind the OPNsense, I do not receive any traffic on the OPNsense.

I've got the same issue, unfortunately without a solution.
Tailscale ACL works, traffic also works on Linux (with disabled auto-SNAT as I want to preserve source IP).
However, when deploying on OPNsense, it breaks.

ping von freeradius => wlc tut (sehe icmp auf dem ts-sidecar in beide richtungen, auf der opnsense tailscale0 gar nix, auf dem lan interface aber schon)
ping von wlc => freeradius nicht, sehe icmp auf der opnsense tailscale0 ausgehen, auf ts-sidecar eingehend + ausgehend

ping from LAN A to LAN B
 traffic outgoing on OPNsense TS interface => incoming+outgoing on TS other subnet router <=> incoming+outgoing on LAN other Subnet Router

ping from LAN B to LAN A
 incoming on LAN other subnet router => outgoing on TS interface other Subnet Router => traffic NOT incoming on OPNsense TS interface

Firewall rules permit everything between these hosts/subnets. And of course with NAT it works, but as said before, losing source IPs which I need.