I got a /23 public subnet from my provider with their gateway within that subnet x.x.91.1/23. I configured my FW with an IP address from that subnet x.x.90.1 and ping is allowed on the FW outside interface, I am trying to setup a IPSec vpn from this site back to the HQ. From HQ and my PC at home, I can ping their gateway x.x.91.1 but cannot ping x.x.90.1. I checked in looking glass bgp table and that subnet is routable on the Internet.
They said that everything is configured correctly on their end and the issue is from my end. I am not sure I agree with them but I am not sure how to validate my argument. Thanks