Interestingly, we just yesterday started experiencing the same problem, again, but with two different tunnels to two different clients in two different states with two different firewall vendors (Cisco and Fortigate), though both on Integra for ISP. ...
I did try that, though rather naively by just initiating a ping from one side or the other - didn't seem to make a different. My working theory is that the ISP was meddling somehow, though I'm still not entirely sure what the error logs I posted mea...
Interestingly, the problem resolved itself. I had tried rebuilding the VPN on both sides about six times, restarting equipment, etc, over the course of 3 hours and didn't have a solution. I let it sit another 6 hours and suddenly it negotiated agai...
