git clone hangs forever on github

Question

When I follow point 5 (Test everything out) in the github guide, the ssh command also hangs forever. According to the guide, I should be presented with a message that "Github does not provide shell access". Below is my output from ssh -vT git@github.com

debug1: Authentication succeeded (publickey).
Authenticated to github.com ([207.97.227.239]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LC_MESSAGES = en_US.UTF-8
debug1: Sending env LC_COLLATE = en_US.UTF-8
debug1: Sending env LANG = da_DK.UTF-8
debug1: Sending env LC_CTYPE = en_US.UTF-8

Is there potentially any sort of filtering/blocking between you and GitHub? — Cascabel, Jan 05 '12 at 23:08
Out of curiosity, are you able to connect to other SSH servers (using keys) without issues? — Marvin Pinto, Jan 05 '12 at 23:10
I also thought it may be filtering but notice the auth succeeds, if it were a firewall it would timeout eventually before that. — Samus_, Jan 06 '12 at 00:19
I tried every workaround mentioned here & even double checked using the `ssh -T git@github.com` command which appears to be working fine. Yet the connection times out over port 22. Answers from this thread - https://stackoverflow.com/q/15589682/8604951 might help someone connect to GitHub properly while this thread -- https://stackoverflow.com/q/25927914/8604951 should help set up access rights to the remote in GitHub properly. But in the end, cloning over HTTPS worked for me. It's not worth the pain IMHO to set up a SSH connection unless TOTALLY necessary. — Jarmos, Jun 07 '20 at 11:47

kevinarpe · Answer 1 · 2021-06-17T11:49:19.927

58

GitHub offers a few different ways to connect to the remote repo. I am behind an onerous firewall. All methods also hang except using http (not https).

For example, the JavaHamcrest project offers (anonymously):

https://github.com/hamcrest/JavaHamcrest.git
git@github.com:hamcrest/JavaHamcrest.git
git://github.com/hamcrest/JavaHamcrest.git

You may also try:

http://github.com/hamcrest/JavaHamcrest.git

Finally, prefix your UNIX command with GIT_TRACE=1 and GIT_CURL_VERBOSE=1, and use Git option --verbose for maximum debug output.

Example: env GIT_TRACE=1 GIT_CURL_VERBOSE=1 git clone --verbose http://github.com/hamcrest/JavaHamcrest.git

edited Jun 17 '21 at 11:49

answered Apr 16 '13 at 01:24

kevinarpe

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It appears `http` (not `https`) links doesn't work for `github` anymore. I.e. your example command doesn't work as it's using `http` scheme. – x-yuri Jul 30 '14 at 12:19
1

also check that you github account has ssh keys - https://inchoo.net/dev-talk/how-to-generate-ssh-keys-for-git-authorization/ – Mauricio Gracia Gutierrez Jun 14 '21 at 22:19

score 51 · Answer 2 · answered Sep 04 '19 at 13:43

51

In my case port 22 was being blocked by a firewall, cloning via https may not work if you have 2-factor authentication enabled. Instead edit your .ssh config to use another port. In your terminal:

nano ~/.ssh/config

then add this:

Host github.com
  Hostname ssh.github.com
  Port 443

answered Sep 04 '19 at 13:43

Hom Bahrani

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Just save me several minutes of digging around to find a solution. Thx!!! – Fedreg Feb 03 '20 at 21:03
Worked for me as well. All my ssh requests were hanging forever. Creating a ~/.ssh/config and adding some config there fixed my issue. Here's some [additional resource](https://docs.github.com/en/authentication/troubleshooting-ssh/using-ssh-over-the-https-port) from GitHub – lucianokrebs Jun 12 '22 at 20:49
This worked. I did add an exception to ssh.exe firewall rules but no thanks to managed firewall it does not function like I wanted to. Updating a config file is an extra step. For windows users: default location for adding such config file, with name "config" C:\Users\\.ssh\config where no file type is set – Erkka Mutanen Jun 13 '22 at 09:01

score 30 · Answer 3 · answered Aug 21 '17 at 11:49

30

Try using HTTPS instead of SSH. Port 22 might be blocked by a firewall.

E.g. instead of:

git clone git@bitbucket.org:repo-owner/my-project.git

Connect via HTTPS:

git clone https://username@bitbucket.org/repo-owner/my-project.git

answered Aug 21 '17 at 11:49

chribsen

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Works on my hosting. The weird thing is that the other method used to work fine before. – gabn88 Aug 14 '19 at 08:59
Some VCs are disabling HTTPS, although you can still use it for cloning and then change the remote to SSH – Amineze Apr 14 '22 at 11:48
I got here having issues with Docker, using HTTPS instead of SSH fixed it for me. – dmanexe Mar 25 '23 at 16:14

score 22 · Accepted Answer · answered Jan 07 '12 at 21:16

22

I think I found the error. The WiMAX router I am using, messes SSH up. After trying another internet connection, it went smooth. The WiMAX router is branded "Alvarion", and according to a Danish Google Group the NAT implementation is broken in the router: http://groups.google.com/group/openspaceaarhus/browse_thread/thread/e99d96122a0522b7.

I have contacted the internet supplier to look into this. If they prove it has nothing to do with their router I will post it here.

Thank you all for your comments, which made me realise it maybe was an infrastructure problem.

answered Jan 07 '12 at 21:16

rvange

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You should accept this as the "correct answer" and upvote the other helpful ones. – Noufal Ibrahim Feb 22 '12 at 10:22
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The company (Skyline) using this router went out of business short after, so I never found a solution for this router. – rvange Jul 08 '15 at 12:11
Using a VPN fixed the issue for me. – Anas Mar 30 '20 at 13:03

score 4 · Answer 5 · answered May 08 '20 at 04:42

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Make sure that you have ssh installed.

Ubuntu: sudo apt-get install ssh

answered May 08 '20 at 04:42

CraigDavid

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even your ssh installed, probably you need to upgrade them. I found it works for me after i upgrade them. – ihsanberahim May 16 '20 at 07:56

score 2 · Answer 6 · answered Mar 01 '15 at 10:00

2

I had the same issue on Xubuntu. Doing ssh -Tv git@github.com hangs forever. Disabling the firewall with sudo ufw disable solved the problem.

answered Mar 01 '15 at 10:00

Christian Rodemeyer

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score 2 · Answer 7 · answered Jul 08 '15 at 03:38

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Was having the same issue on Windows / msys2. Seems to be something with the router. I pinged github.com and then cloned using my username

git clone https://cchamberlain@github.com/cchamberlain/<repo>

and it worked. Not sure if its a one-off yet.

answered Jul 08 '15 at 03:38

cchamberlain

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score 1 · Answer 8 · answered Mar 13 '15 at 03:25

In my case I found that my Anti-Virus was blocking access to Github. The popup appeared behind all my windows which I did not realize earlier. The moment I allowed access to GitHub "ssh -vT git@github.com" command worked. I was also able to clone a repository and push my code from local to Github.

score 1 · Answer 9 · answered Oct 23 '22 at 23:39

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If you have a different default SSH port in /etc/ssh/sshd_config, git clone won't work out of the box with a git@... url.

This solution above to the rescue.

answered Oct 23 '22 at 23:39

Dhruv Batheja

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score 0 · Answer 10 · answered Jun 14 '21 at 22:21

Things to check when git clone and git push hang forever no error message

you already have SSH keys configured for you github account - also check that you github account has ssh keys - https://inchoo.net/dev-talk/how-to-generate-ssh-keys-for-git-authorization/
your firewall/antivirus is not blocking your traffic

score 0 · Answer 11 · answered Oct 01 '21 at 22:59

0

In my case was IPV6 blocking cloning, I disable ipv6 on ssh and works

answered Oct 01 '21 at 22:59

Pablo Díaz

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score 0 · Answer 12 · answered Feb 08 '22 at 21:55

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Mine dumb case was that, I changed default SSH port in /etc/ssh/ssh_config instead of /etc/ssh/sshd_config

answered Feb 08 '22 at 21:55

М.Б.

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score 0 · Answer 13 · answered Dec 25 '22 at 12:58

0

Cloning it again solved the issue for me. Try again.

answered Dec 25 '22 at 12:58

Leutecia

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score 0 · Answer 14 · answered Apr 14 '23 at 00:25

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In my case an authentication/authorization pop-up window presented but somehow ended up being hidden behind other windows so I didn't see it. I minimized other windows to find it, logged in, and git clone continued normally.

answered Apr 14 '23 at 00:25

gonzobrains

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score 0 · Answer 15 · answered Jun 13 '23 at 04:07

In my case, the MacOS keychain contains credentials, initially given from VS Code for github.com for the VS Code sync feature. I dont know, what I've changed in the meantime, maybe switched to 2FA, but with this credentials I was unable to login to github.com from the command line, neither via ssh nor https. After I've deleted the github.com entry in MacOS keychain, it works.

score -1 · Answer 16 · answered Jul 03 '21 at 18:35

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I was just struggling with that (after updating to using API Token instead of password, changes on github since July'21)

What helped me was to use http instead of https in git clone.

Simple as that.

answered Jul 03 '21 at 18:35

radekbaranowski

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score -1 · Answer 17 · answered Mar 09 '22 at 01:23

-1

in my case my /etc/resolv.conf was messed up, i noticed pc would fail to even ping google.com. Fixed that that and life was grand.

answered Mar 09 '22 at 01:23

rrosa

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git clone hangs forever on github

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