I have a number of laptops with built in cellular using the Barracuda generated IPSEC vpn to connect to an SSL 380. Randomly I'll have clients that can't connect and get the message:
Can't connect to Barracuda IPsec
The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer.
After they try a few times they can connect.
I've had them check the internet when they're having the problem and they can open a webpage.
Any ideas on how to troubleshoot or logs to look at?
I'm not seeing anything being blocked in the firewall.
I also have an SSL180 and have the same errors with it.
(FYI I've edited my original post and previously thought port 80 was being blocked but was looking at the wrong external IP)