I have this very basic SNAT configuration.
This ELR is the GW of the subnet 172.31.1.0/24, the VM has an IP address 172.31.1.5. The external IP of the ELR is 192.168.202.37. I can see traffic hitting the ELR but no NAT rule is the table. The following two screenshots are with an extended ping to 18.104.22.168 running in the back.
Any idea, I have tried this in several ways and I don't see why is not working.