Today I tried to pull latest from the develop branch in a git repository in TFS 2015. I use SSH for authentication to tfs git repositories, and when I ran the git pull command, I was presented with the following error:
no matching cipher found. their offer: aes256-cbc,aes192-cbc,aes128-cbc
There were some other lines about making sure the repository existed, and that I had permission, etc. But this line was the one that sort of stood out to me. It is not an error that I have come across before. It took me a little while to track down the issue, which is why I am writing this.
The error is not a TFS issue, nor is it a git issue. The error is coming from SSH. I think it started after I updated my version of openSSH on my mac to version 7.6p1.
To fix the issue, I opened up /etc/ssh/ssh_config and added the lines:
Match Host my-tfs-server.company-domain.com
Ciphers +aes128-cbc,aes192-cbc,aes256-cbc
You could make it less restrictive and omit Match Host line altogether, but I would rather add the exception for the specific servers that require it. After adding those lines, I was able to pull latest again.
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