Why is my Rails app not pushing to Github? (error:1407742E:SSL )

Question

I am finishing off a blog tutorial and am trying to do my final push to GitHub and Heroku. I just added the popper gem to the Gemfile and then tried to push to GitHub as usual using git push origin master .

Normally it then asks for my username and password, but instead I got the following error and have no idea what it means or why I got it. I haven't changed anything else as far as I remember.

fatal: unable to access 'https://github.com/<username>/FrogBlog.git/': error:1407742E:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 alert protocol version

I am unsure how to proceed, as this message means nothing to me. I can post more files from my project if required, please advise.

Answer 1

GitHub recently deprecated some old and insecure cryptographic standards , including TLSv1, which is referenced in your error message:

On February 8, 2018 we'll start disabling the following:

• TLSv1/TLSv1.1: This applies to all HTTPS connections, including web, API, and git connections to https://github.com and https://api.github.com .
• diffie-hellman-group1-sha1: This applies to all SSH connections to github.com diffie-hellman-group14-sha1: This applies to all SSH connections to github.com

We'll disable the algorithms in two stages:

• February 8, 2018 19:00 UTC (11:00 am PST) : Disable deprecated algorithms for one hour
• February 22, 2018 19:00 UTC (11:00 am PST) : Permanently disable deprecated algorithms

Most Git clients should continue to work, but there are some known incompatibilities .

If you update your Git client (it looks like you're using the standard CLI client?) pushing to GitHub will probably start working again.