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I upgraded Catalina, then I lost access to my github repo:

$ ssh -T git@github.com
kex_exchange_identification: Connection closed by remote host

$ ssh -vvv git@github.com
OpenSSH_8.1p1, LibreSSL 2.7.3
debug1: Reading configuration data /Users/XXX/.ssh/config
debug1: /Users/XXX/.ssh/config line 1: Applying options for *
debug1: /Users/XXX/.ssh/config line 6: Applying options for github.com
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: Connecting to ssh.github.com port 443.
debug1: Connection established.
debug1: identity file /Users/XXX/.ssh/id_rsa type 0
debug1: identity file /Users/XXX/.ssh/id_rsa-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
kex_exchange_identification: Connection closed by remote host

This used to work fine. Any idea how to debug this?

Kam
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1 Answers1

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Connecting to ssh.github.com port 443

That means you are Using SSH over the HTTPS port

Try instead the test:

ssh -Tv -p 443 git@ssh.github.com

But double-check to that port 22 is blocked:

ssh -T -p 22 git@github.com

If this still fails, check out "The hard way to debug the mysterious git+ssh+proxy failure “bash: No such file or directory”"

Solution: Manually set SHELL to the shell's full pathname, e.g. /bin/bash.

VonC
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