RED Tunnel between two UTMs

Hello,

in my network there is SG210 in HA and bout 15 REDs, 15w and 50, they are working fine.

Im trying to establish RED tunnel between SG210 and my UTM Home Licence, tunnel is up, i set up interfaces on both sites and as hardware used desired RED.

IP on server is 10.10.7.1

client: 10.10.7.2, interface type is Ethernet, mask /24, both sites same.

I set up also static routing and firewall rules.

And the problem comes on, from UTMs im able to ping both interfaces criss cross, also from client utm im able to ping thru tools remote interfaces, also other remote RED interfaces, and clients on server side.

but from local PC connected to LAN on client side im able to ping only RED interface on client site, not the one on remote site and therefore no remote network is available, and it is not only ICMP, RDP, HTTP and other services are also not working...

In my opinion those two RED interfaces should work like they are next to each other and i should be able to ping both sites also without any firewall rules and so on, but nothing is working :-(

Followed also this guide: https://community.sophos.com/kb/en-us/120157

also did not helped...

Any suggestions are welcome, thank you,

Vitek