IPV4 Unicast Route Firewall and Policies

hello community

I just changed my Cisco router with an xf sfos

I wanted to connect from the network 10.10.10 / 24 to a web page hosted in the WEB server 172.16.15.1

the sfos and the router DT_router are linked with an IPSEC VPN.
from the computer 10.10.10.10 I manage to ping the interface 192.168.1.230

on the old cisco I had a static route

ip route 172.16.15.0 255.255.255.0 192.168.1.230

that I can't put on the sophos to make it work.

here is an ulistrasion of my network

Can you help me please.