After setting up the hub tunnel and certificate we cannot get the tunnel to connect.
The Client side hub logs show the following errors:
A security device was decrypting and encrypting the SSL packet causing the SSL error 5
This issue was not a hub or UIM specific.
The problem is external to Nimsoft/UIM and could be seen on any hub version using a tunnel
We found out that there was a setting on the Client firewall called 'SSL Decryption' that was taking the certificate that we were sending out, trying to decrypt it, and then re-encrypt it and sending it out.
As soon as the customer removed that setting or added an exception for our two servers we were able to establish a tunnel connection.