Nope the firewalls don’t terminate GRE, non-encrypted IPSec, or GTP-U tunnels.
As documented here :
Maybe the far end does not have the hardware to support encryption? Just a guess at one possible reason.
I once had a tunnel to Verizon Wireless for an M2M solution and they specified GRE, would not or could not do IPSEC.
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!