We've done plenty of s2s IPSEC VPN tunnels between our DC firewalls and branch offices. I have a new branch office which we are configuring the same way as the others, yet the IPSEC VPN is not operating as expected. The tunnel is showing as up and the IKE Phase 1 & 2 are successful. However, on both firewalls, when I go into Tunnel Info all I'm showing is packets & bytes being encapsulated with the number incrementing but the decap column stays at 0. Has anyone experienced this issue and what have you done to resolve? I've confirmed my configuration looks good, I've rebooted the ESXi host, and rebooted the firewall.
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