ssh_exchange_identification: Connection closed by remote host under Git bash

Question

I work at win7 and set up git server with sshd. I git --bare init myapp.git, and clone ssh://git@localhost/home/git/myapp.git in Cywgin

Answer 1

Hit the following ssh restart command in linux

prayag@prayag:~/backup/NoisyNeighbour$ service ssh restart 
stop: Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=1417676764 pid=5933 comm="stop ssh ") interface="com.ubuntu.Upstart0_6.Job" member="Stop" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init")
start: Rejected send message, 1 matched rules; type="method_call", sender=":1.76" (uid=1417676764 pid=5930 comm="start ssh ") interface="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init")

Answer 2

For fixing the issues add the Hostname for Git on ~/.ssh/config,

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

In my case github!

Answer 3

After removing/deleting the rm ~/.ssh/known_hosts, my issue was fixed

Answer 4

We migrated our git host instance/servers this morning to a new data center and while being connected to both: VPN (from remote/home) or when in office network, I got the same error and was not able to connect to clone any GIT repo.

Cloning into 'some_repo_in_git_dev'...
ssh_exchange_identification: Connection closed by remote host
fatal: Could not read from remote repository.

This will help if you are connecting to some or all servers via a jump host server.

Earlier in my ~/.ssh/config file, my setting to connect were:

Host * !ssh.somejumphost.my.company.com
     ProxyCommand ssh -q -W %h:%p ssh.somejumphost.my.company.com

What this means is, for any SSH based connection, it will connect to any * server via the given jump host server except/by ignoring "ssh.somejumphost.my.company.com" server (as we don't want to connect to a jump host via jump host server.

To FIX the issue, all I did was, change the config to ignore git server as well:

Host * !ssh.somejumphost.my.company.com !mycompany-git.server.com !OrMyCompany-some-other-git-instance.server.com
     ProxyCommand ssh -q -W %h:%p ssh.somejumphost.my.company.com

So, now to connect to mycompany-git.server.com while doing git clone (git SSH url), I'm telling SSH not to use a jump host for those two extra git instances/servers.

Answer 5

I solved it this way.

ssh -vvv <username>@github.com to see github IP.

Then opened browser and opened github via IP to find it was an issue with firewall.

Answer 6

Just enter on the server side :

echo 'SSHD: ALL' >> /etc/hosts.allow

It sorted it out for me.