Using “KexAlgorithms diffie-hellman-group1-sha1” did not resolve “no matching key exchange method found” error

Question

There\'s a lot of questions about the following error, but they all have same solution which did not have any effect:

$ git push
Unable to negotiate with 192         


        

Answer 1

I resolved a similar problem on Windows 10 by updating my version of Open SSH to the latest (7.5p1-1) and then making sure that C:Program Files\OpenSSH\bin was the first entry in the system path so it used that ssh.exe and not any others.

Answer 2

Resolved by using this command I randomly found in some comment thread:

export GIT_SSH_COMMAND='ssh -o KexAlgorithms=+diffie-hellman-group1-sha1'

Must be called every time you open the Git Bash. Yeah, git is hell.

Answer 3

I also faced the same issue.Please install the older version of "Git for Windows". https://github.com/git-for-windows/git/releases/tag/v2.17.1.windows.1 This version will solve your issue.

Answer 4

I started getting this error after updating to "git for windows" to version 2.25.1 This algo was deprecated by GitHub in Feb. of 2018.

@Kenster's comment on "use ssh -vv ..." to see where your config files live was key. My home drive in windows is a network drive so my default .ssh folder is on that network volume.

Adding a file called "config" to that folder with:

Host 127.0.0.1
Port 2222
KexAlgorithms +diffie-hellman-group1-sha1

allowed me to connect to my vagrant environment again.

Answer 5

I faced the same issue using Git for Windows 2.27.0.

Git for Windows brings its own OpenSSH implementation. I had to change the config file C:\Program Files\Git\etc\ssh_config

Host myhost@example.com
    Port 22
    KexAlgorithms +diffie-hellman-group1-sha1
    KexAlgorithms +diffie-hellman-group14-sha1