IPSEC from PFSense 1.2.3 to PFSense 1.2.3
I have two PFSense routers using the same version and when i initiate the IPSEC connection between the to the one at the colocation doesn't have any errors in the log however the one onsite here gives me a red line that says:
[Unknown Gateway/Dynamic]: INFO: 172.16.x.x used for NAT-T
I have all of the relevant ports forwarded and i've tried both checking and unchecking the NAT-T box on both routers to no avail all it does is update the error on the inhouse box.
Though your error is one I had not seen before, it looks harmless.
You may want to try a new 1.2.3-RC3 image from snapshots.
NAT-T has been removed, it caused too many other regressions.