GitHub disabling access to SSH using weak cryptographic ciphers

Issue

  • Builds are failing to clone or update a GitHub repository with an error Peer reports incompatible or unsupported protocol version. like:
> git fetch --no-tags --progress https://github.com/my-org/my-repo.git +refs/heads/master:refs/remotes/origin/master 
ERROR: Error cloning remote repo 'origin' 
hudson.plugins.git.GitException: Command "git fetch --no-tags --progress https://github.com/my-org/my-repo.git +refs/heads/master:refs/remotes/origin/master" returned status code 128: 
stdout: 
stderr: fatal: unable to access 'https://github.com/my-org/my-repo.git/': Peer reports incompatible or unsupported protocol version.

Environment

Resolution

On Thursday, 22nd February 2018 19:00 UTC (11:00 am PST), GitHub disabled access to their service using weak cryptographic ciphers.

The removal of weak ciphers is permanent.

For DEV@cloud users this means that you won???t be able to connect to GitHub over HTTPS on Fedora 17 build agents which are used by default.

To avoid this issue you can either switch to SSH authentication or use our Fedora 25 build agents as described in this article .

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1 Comments

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    Roberto Marquez

    Thanks!

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