Problem with connection

Hello, can someone take advice, why I cannot ping router interface and therefore internet from Linux?

Traceroute from Linux is useless -> no information 

I have static default 0 route from FortiGate pointing to 23.1.2.1. I have policy from port 3 to port 2. And I have central SNAT from port 3 to port 2, where I translate to outgoing interface - no hit count.

When I try to diagnose, I see only echo request and no echo reply. I dont know why. Any tip?

What is working is ping from Linux to fortigate:

10.10.10.49/24 ping to 10.10.10.71/24 -> ok

10.10.10.49/24 ping to 23.1.2.71/24 -> ok - policy take that traffic, I have some bytes

10.10.10.49 ping to 23.1.2.1 -> not ok - policy doesn't work, No more bytes

10.10.10.49 ping to 8.8.8.8 -> not ok

Also ping from Fortigate to internet 8.8.8.8 is working

FortiGate ping to 8.8.8.8 -> ok

Please help and bear with me. I am a new guy in Fortinet