Unable to connect to Tentacle

This is a fresh install (Server 2k8 R2 SP1) and I can’t even connect locally to https://localhost:10933 and I’m not sure what the problem is. I attached a log file. Any help would be greatly appreciated!

OctopusTentacle.txt (11 KB)

Hi Tim,

Thanks for reporting this. Are you trying to connect using a web browser? This message from the log:

2014-04-03 14:40:19.9685  ERROR  Unhandled error when processing request from client
System.ComponentModel.Win32Exception (0x80004005): The client and server cannot communicate, because they do not possess a common algorithm

Suggests that the problem is due to your browser and our SSL server not being able to negotiate an agreed protocol. Our server uses TLS 1.0 only. Is it possible that the browser you are using does not have TLS enabled?

In IE there are some settings you can set to configure the SSL protocols - you should enable TLS 1.0:


Let me know if that doesn’t work.


Not sure what’s going on here. I was originally trying to troubleshoot why I couldn’t reach my tentacle from my server but I believe that was a firewall issue which I’ve now resolved. However, I’m still getting the above error both from the server and even locally on the tentacle. TLS 1.0 was already enabled in IE and, just for the heck of it, I enabled all of the protocols and it still doesn’t work. In addition to the above error, I’m seeing a lot of errors in the system event log from Schannel, event ID 36871:

“A fatal error occurred while creating an SSL server credential. The internal error state is 10013.”

Hi Tim, based on a similar error message reported for RDP clients, it sounds like the allowed protocols on the machine might be restricted:

Do the settings in the linked article turn up any clues?