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 correctly  But I need config git of Cygwin again  I want to git clone in Git Bash  I run git clone ssh   git localhost home git myapp git and get following message  ssh exchange identification  Connection closed by remote host   then I run ssh -vvv git localhost in Git Bash and get message  debug2  ssh connect  needpriv 0 debug1  Connecting to localhost  127 0 0 1  port 22  debug1  Connection established  debug1  identity file  c Users MoreFreeze  ssh identity type -1 debug3  Not a RSA1 key file  c Users MoreFreeze  ssh id rsa  debug2  key type from name  unknown key type  -----BEGIN  debug3  key read  missing keytype debug3  key read  missing whitespace     above it repeats 24 times debug2  key type from name  unknown key type  -----END  debug3  key read  missing keytype debug1  identity file  c Users MoreFreeze  ssh id rsa type 1 debug1  identity file  c Users MoreFreeze  ssh id dsa type -1 ssh exchange identification  Connection closed by remote host   it seems my private keys has wrong format  And I find that there are exactly 25 line in private keys without BEGIN and END  I m confused why it said NOT RSA1 key  I totally ensure it is RSA 2 key   Any advises are welcome  btw  I have read first 3 pages on google about this problem

User · Answer

For me this was caused by a limit on the number of concurrent ssh sessions   I added the two params below to  etc ssh sshd config and then things worked   echo  MaxSessions 2000   gt  gt   etc ssh sshd config echo  MaxStartups 2000   gt  gt   etc ssh sshd config service ssh restart

User · Answer

Similar to Arun Sangal the problem lied in an in  ssh config entry  Host my sshhost com   ProxyCommand ssh -q -W  h  p myremotemachine my company com   The remote machine was added to avoid with ssh for VPN connections and worked well  But for the vacation period I switched off the myremotemachine and run into the described problem

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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

User · Answer

Got the same error message   Turning off WiFi and turning it back on again worked for me

User · Answer

Just enter on the server side    echo  SSHD  ALL   gt  gt   etc hosts allow   It sorted it out for me

User · Answer

Got the same error too when connecting to GitHub with ssh as I move from one workplace to another  according to my situation  it seems that dns servers of different networks may get various ip address of github and the known hosts file not identify it when changes happened  So change dns or switch back original network may work

User · Answer

I experienced this today and I just do a   12345 123456 MINGW64   development workspace test  develop    git status Refresh index  100   1204 1204   done  On branch develop Your branch is up to date with  origin develop    nothing to commit  working tree clean  12345 123456 MINGW64   development workspace test  develop    git fetch   Then all worked again

User · Answer

You can get  ssh exchange identification  Connection closed by remote host  if your sshd service is not operational   If you have access to the server check you have the sshd service running with     ps aux   grep ssh   and check it is listening on port 22    netstat -plant   grep  22   more details here

User · Answer

To solve this edit   etc ssh ssh config  and comment the following line 1 ProxyCommand  usr bin sss ssh knownhostsproxy -p  p  h https   www evilbox ro linux solve-ssh exchange identification-connection-closed-by-remote-host  for reference

User · Answer

In windows machine  remove the content of config file present in C  Users yourusername  ssh  This worked well for me

User · Answer

Remove any config in    ssh config or other ssh config places which will disallow it to reach to Github servers In my case it was below config  and I wasn t connected to VPN  Host     ProxyJump 10 0 0 50   Note  - If I am connected to VPN  This config would mean git clone or any git operation will be send via VPN which might be slow depending on type of VPN we are using

User · Answer

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

User · Answer

After removing deleting the rm    ssh known hosts  my issue was fixed

User · Answer

Make sure you are not connect to any kind of VPN

User · Answer

if hostname does not work  try IP address   This is going on right now so I have to say   I try to ssh with my host name and it does not work  ssh root host example net   this gives the error  ssh exchange identification  Connection closed by remote host   this USED to work one hour back   BUT  and here is the interesting part  the IP address works   ssh root 192 168 0 100    of course the actual IP address is different   Go figure

User · Answer

I solved it after changing the ssh port  amp  MaxStartups variable in  etc ssh sshd config to    port 2244 MaxStartups 100   Then  restart the service  service sshd restart   If still it does not work  restart you system

User · Answer

Please use Port 7999 and Try  it will work

User · Answer

I solved it this way   ssh -vvv  lt username gt  github com to see github IP   Then opened browser and opened github via IP to find it was an issue with firewall

User · Answer

Simple server reboot solved the problem for me  Try hard reboot   if dont work after soft reboot

User · Answer

I just ran into this today and it was because the server I was trying to connect to was overloaded with processing  So it may be possible that the server is low on memory or CPU starved

User · Answer

Disconnecting and reconnecting to the current network worked for me

User · Answer

Hi I fix this on one vps service   restarting it  other way is if you have a console from your service o any other way to run a command in your remote machine the only command you must run is restart the ssh daemon and enjoy    P   etc init d ssh restart

User · Answer

For me  the issue was that there was a proxy set in  etc ssh ssh config and it was down  solved the issue by whitelisting the remote git IP and removing the proxy line   Hope this helps someone

User · Answer

If you are using a VPN  Turn it off and try to push again

User · Answer

I had this problem today and I realize that I was connected to 2 differente networks  LAN and WLAN   I solved it just disconnecting the cable from my Ethernet adapter  I suppose that the problem is caused because the ssh key is tied with the MAC address of my wireless adapter  I hope this helps you

User · Answer

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

[git] ssh_exchange_identification: Connection closed by remote host under Git bash

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