I've wanted to connect my share hosting with ssh. So I generate an ssh key in the ssh action of cpanel and authorized it. Then I've downloaded the private key and drop it in the ./ssh folder of my MacBook.I've used this code to connect my host.
ssh -p 2083 username#host IP
but I got this error:
kex_exchange_identification: Connection closed by remote host
How can I solve my problem?
I run into a similar case with a small computer I have in my desk. What I did to debug the issue was to run sshd -t, which runs the sshd daemon in debug mode. This command reported that the permissions of my keys were invalid. All I had to do then was to go in the folder where the keys are stored and issue chmod 0600 <your_ssh_keys>.
Maybe the action you run generated things with the wrong permissions too.
I got this error when using docker command with remote host
docker -H ssh://user#server compose up
after some digging i found on my remote server in auth logs (/var/log/auth.log) this:
Aug 8 14:51:46 user sshd[1341]: error: beginning MaxStartups throttling
Aug 8 14:51:46 user sshd[1341]: drop connection #10 from [some_ip]:32992 on [some_ip]:22 past MaxStartups
This lead me to change MaxStartups settings in /etc/ssh/sshd_config. After restarting ssh service everything worked like a charm.
I had same problem and it was happend as I use ProxyCommand in ssh config file. In my case the Host was not defined correctly which then caused the same error!
I want to connect to my server via ssh. I have installed the remote dev package in VS Code, I can connect via ssh in VSC terminal, but not via the ssh 'panel'. When I do so, I get:
[10:45:40.155] Spawned 9044
[10:45:40.266] > local-server> Spawned ssh: 7472
[10:45:40.292] stderr> OpenSSH_7.9p1, OpenSSL 1.1.1a 20 Nov 2018
[10:45:41.149] stderr> debug1: Server host key: ecds...56 SHA256:5SDO....
[10:45:41.183] stderr> 'C:\Users\Name' is not recognized as an internal or external command,
[10:45:41.183] stderr> operable program or batch file.
[10:45:41.186] stderr> Host key verification failed.
[10:45:41.189] > local-server> ssh child died, shutting down
[10:45:41.197] Local server exit: 0
[10:45:41.198] Received install output: OpenSSH_7.9p1, OpenSSL 1.1.1a 20 Nov 2018
debug1: Server host key: ecdsa-s.....
'C:\Users\Name' is not recognized as an internal or external command,
operable program or batch file.
Host key verification failed.
As you can see, I have C/users/Name Surname/... user which causes trouble - it gets parsed with whitespace between Name and Surname
it happens probably when it tries to reach this:
[10:45:40.091] Local server env: {"DISPLAY":"1","ELECTRON_RUN_AS_NODE":"1","SSH_ASKPASS":"c:\\Users\\Name Surname\\.vscode\\extensions\\ms-vscode-remote.remote-ssh-0.50.0\\out\\local-server\\askpass.bat","VSCODE_SSH_ASKPASS_NODE":"C:\\Users\\Name Surname\\AppData\\Local\\Programs\\Microsoft VS Code\\Code.exe","VSCODE_SSH_ASKPASS_MAIN":"c:\\Users\\Name Surname\\.vscode\\extensions\\ms-vscode-remote.remote-ssh-0.50.0\\out\\askpass-main.js","VSCODE_SSH_ASKPASS_HANDLE":"\\\\.\\pipe\\vscode-ssh-askpass-1e1200d27-sock"}
My question is, what can I do about it?
In the extension settings search for: #ext:ms-vscode-remote.remote-ssh Path
Then under Path specify an absolute path for an ssh installation. On my windows install it was located here: C:\Windows\System32\OpenSSH\ssh.exe
When I do a vagrant ssh in my project on a windows 10 laptop I get this error:
vagrant#127.0.0.1: Permission denied (publickey).
When I then delete .vagrant/machines/default/virtualbox/private_key and do vagrant ssh again, I get access to the VM.
But when I then exit the VM and do `vagrant halt', I get this error:
==> default: Attempting graceful shutdown of VM...
default:
default: Vagrant insecure key detected. Vagrant will automatically replace
default: this with a newly generated keypair for better security.
default:
default: Inserting generated public key within guest...
translation missing: en.vagrant_ps.errors.powershell_error.powershell_error
It seems to me that it tries to add my SSH key, but something goed wrong. Any idea how I can solve this?
you can simply run following command in your cmd:
set VAGRANT_PREFER_SYSTEM_BIN=0
vagrant ssh
successfully tested under the windows 10 with vagrant 2.1.5
you can also see: https://www.vagrantup.com/docs/other/environmental-variables.html#vagrant_prefer_system_bin
I solved error:
vagrant#127.0.0.1: Permission denied (publickey)
editing my Vagrantfile.
It seems Vagrant didn't like this configuration:
config.vm.synced_folder "app", "/home/vagrant"
Edited it to:
config.vm.synced_folder "app", "/vagrant"
The solution provided by #rekinz works, but I want to add some further explanation.
set VAGRANT_PREFER_SYSTEM_BIN=0
Vagrant will default to using a system provided SSH on Windows. This environment variable can also be used to disable that behavior to force Vagrant to use the embedded SSH executable by setting it to 0.
I also used Vagrant halt to clean up a previous installation. And then, when I provisioned it again, I had got the same error as the OP.
I think the SSH provided by Windows is not working and using this VAGRANT_PREFER_SYSTEM_BIN has reset the same.
The problem can be that the sshClient windows feature intercepting the operation, try opening powershell as admin and run the following:
Remove-WindowsCapability -Online -Name OpenSSH.Client~~~~0.0.1.0
if that doesn't solve then install sshclient again
Get-WindowsCapability -Online | ? Name -like 'OpenSSH*'
You can also check the permission of the file
.vagrant/machines/default/virtualbox/private_key
In my case the permissions for this file were for an Unknown user (likely from a previous OS installation) - setting the permissions for this file to myself fixed the issue
It works for me when I point to the private_key (check permission of it first )
ssh -i ${vagrant_home}/.vagrant/machines/default/virtualbox/private_key vagrant#127.0.0.1 -p 2222
On Windows 10, when we try to login to the Virtual machine node (eg. node01) using
vagrant ssh node01
If you get the error
vagrant#127.0.0.1: Permission denied (publickey)
Try to follow the steps below:
In the Power Shell, set the environmental variable VAGRANT_PREFER_SYSTEM_BIN to prefer using the local ssh instead of the packaged ssh (Read more about the variable here)
$Env:VAGRANT_PREFER_SYSTEM_BIN += 0
As per issue listed in Vagrant Github:
vagrant#127.0.0.1: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
Once done, do the vagrant ssh to the vm which was not accessible earlier
Configuring a new Digital Ocean droplet with SSH keys. When I run ssh-copy-id this is what I get:
ssh-copy-id user#012.345.67.89
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
sign_and_send_pubkey: signing failed: agent refused operation
user#012.345.67.89's password:
Number of key(s) added: 1
Now try logging into the machine, with: "ssh 'user#012.345.67.89'"
and check to make sure that only the key(s) you wanted were added.
However, when I then attempt to ssh in, this happens:
ssh user#012.345.67.89
sign_and_send_pubkey: signing failed: agent refused operation
user#012.345.67.89's password:
Upon entering the password, I am logged in just fine, but this of course defeats the purpose of creating the SSH key in the first place. I decided to take a look at the ssh-agent server-side and here's what I get:
user#012.345.67.89:~# eval `ssh-agent -s`
Agent pid 5715
user#012.345.67.89:~# ssh-add -l
The agent has no identities.
user/.ssh/authorized_keys does contain an ssh-rsa key entry, as well, but find -name "keynamehere" returns nothing.
Run ssh-add on the client machine, that will add the SSH key to the agent.
Confirm with ssh-add -l (again on the client) that it was indeed added.
After upgrading Fedora 26 to 28 I faced same issue.
And following logs were missing
/var/log/secure
/var/log/messages
ISSUE:
antop#localmachine ~ ssh root#ocp1.example.com
sign_and_send_pubkey: signing failed: agent refused operation
root#ocp1.example.com's password:
error message is not pointing actual issue. Issue resolved by
chmod 700 ~/.ssh
chmod 600 ~/.ssh/*
I was having the same problem in Linux Ubuntu 18. After the update from Ubuntu 17.10, every git command would show that message.
The way to solve it is to make sure that you have the correct permission on the id_rsa and id_rsa.pub.
Check the current chmod number by using stat --format '%a' <file>.
It should be 600 for id_rsa and 644 for id_rsa.pub.
To change the permission on the files use
chmod 600 id_rsa
chmod 644 id_rsa.pub
That solved my issue with the update.
Run the below command to resolve this issue.
It worked for me.
chmod 600 ~/.ssh/id_rsa
I once had a problem just like yours, and this is how I solved it through the following steps.
chmod 700 ~/.ssh
chmod 600 ~/.ssh/*
ssh-copy-id user#ip
ssh-agent -s
ssh-add
I had the error when using gpg-agent as my ssh-agent and using a gpg subkey as my ssh key https://wiki.archlinux.org/index.php/GnuPG#gpg-agent.
I suspect that the problem was caused by having an invalid pin entry tty for gpg caused by my sleep+lock command used in my sway config
bindsym $mod+Shift+l exec "sh -c 'gpg-connect-agent reloadagent /bye>/dev/null; systemctl suspend; swaylock'"
or just the sleep/suspend
Reset the pin entry tty to fix the problem
gpg-connect-agent updatestartuptty /bye > /dev/null
and the fix for my sway sleep+lock command:
bindsym $mod+Shift+l exec "sh -c 'gpg-connect-agent reloadagent /bye>/dev/null; systemctl suspend; swaylock; gpg-connect-agent updatestartuptty /bye > /dev/null'"
eval "$(ssh-agent -s)"
To first start the ssh agent
ssh-add
To then add the ssh key
To this error:
# git pull
sign_and_send_pubkey: signing failed: agent refused operation
git#github.com: Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights and the repository exists.
Verify or add again the public key in Github account > profile > ssh.
I solved like this:
# chmod 400 ~/.ssh/id_rsa
# ls ~/.ssh/id_rsa -ls
4 -r--------. 1 reinaldo reinaldo 1679 Jul 26 2017 /home/reinaldo/.ssh/id_rsa
# git pull
remote: Counting objects: 35, done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 35 (delta 9), reused 34 (delta 9), pack-reused 0
Unpacking objects: 100% (35/35), done.
Thank you.
There could be various reason for getting the SSH error:
sign_and_send_pubkey: signing failed: agent refused operation
Some of them could be related to the issues highlighted by the other answers (see this thread answers), some of them could be hidden and thus would require a closer investigation.
In my case I've got the following error message:
sign_and_send_pubkey: signing failed: agent refused operation
user#website.domain.com: Permission denied (publickey,gssapi-keyex,gssapi-with-mic)
The only way to find the real problem was to invoke the -v verbose option which resulted in printing a lot of debugging info:
debug1: Connecting to website.domain.com [xxx.xxx.xxx.xxx] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/id_rsa.website.domain.com type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_rsa.website.domain.com-cert type -1
Please note that the line saying key_load_public: No such file or directory is referring the next line and not the previous line.
So what SSH really says is that it could not find the public key file named id_rsa.website.domain.com-cert and that seemed to be the problem in my case since my public key file did not contain the -cert suffix.
Long story short: the fix in my case was just to make sure that the public key file was named as expected. I could never suspected that without debugging the connection.
The bottom line is USE THE SSH VERBOSE MODE (-v option) to figure out what is wrong, there could be various reasons, none that could be found on this/another thread.
First
ssh-add
then
ssh user#ip
this worked for me
Beware of how you name your ssh key files
If you have more than one key pair, you may be using ssh-keygen with the -f <key name> to name the output files. In my case, I was naming my keys like username#organization and username#organization.pub, which helps to keep multiple key pairs organized.
The problem is that the ssh agent doesn't like the # character.
In my case this was causing the sign_and_send_pubkey: signing failed: agent refused operation error, and was preventing the session keyring to interact with the ssh agent.
Renaming my key files to username_at_organization fixed the problem.
Yes. Run ssh-add on the client machine.
Then repeat command ssh-copy-id userserver#012.345.67.89
I got a sign_and_send_pubkey: signing failed: agent refused operation error as well. But in my case the problem was a wrong pinentry path.
In my ${HOME}/.gnupg/gpg-agent.conf the pinentry-program property was pointing to an old pinentry path. Correcting the path there and restarting the gpg-agent fixed it for me.
I discovered it by following the logs with journalctl -f. There where log lines like the following containing the wrong path:
Jul 02 08:37:50 my-host gpg-agent[12677]: ssh sign request failed: No pinentry <GPG Agent>
Jul 02 08:37:57 my-host gpg-agent[12677]: can't connect to the PIN entry module '/usr/local/bin/pinentry': IPC connect call failed
In my case the problem was that GNOME keyring was holding an invalid passphrase for the ssh key to be used. After spending indecent amount of time troubleshooting this issue I ran seahorse and found the entry to hold empty string. I can only guess that it was caused by mistyping the passphrase at first use some time earlier, and then probably cancelling the requester or so in order to fall back to command line. Updating the entry with correct passphrase immediately solved the problem. Deleting that entry (from "login" keyring) and reentering passphrase at that first prompt (and checking the appropriate checkbox) solves this too. Now agent gets the correct passphrase from the unlocked at login keyring named "login" and neither asks for passphrase nor "refuses operation" anymore. Of course YMMV.
This should be rather a SuperUser question.
Right I have the exact same error inside MacOSX SourceTree, however, inside a iTerm2 terminal, things work just dandy.
However, the problem seemed to be that I've got two ssh-agents running ;(
The first being /usr/bin/ssh-agent (aka MacOSX's) and then also the HomeBrew installed /usr/local/bin/ssh-agent running.
Firing up a terminal from SourceTree, allowed me to see the differences in SSH_AUTH_SOCK, using lsof I found the two different ssh-agents and then I was able to load the keys (using ssh-add) into the system's default ssh-agent (ie. /usr/bin/ssh-agent), SourceTree was working again.
For me the problem was a wrong copy/paste of the public key into Gitlab. The copy generated an extra return. Make sure what you paste is a one-line key.
I need to share, as I spent too much time looking for a solution
Here was the solution : https://unix.stackexchange.com/a/351742/215375
I was using this command :
ssh-keygen -o -t rsa -b 4096 -C "email#example.com"
gnome-keyring does not support the generated key.
Removing the -o argument solved the problem.
What worked here : on the client
1) ssh-add
2) ssh-copy-id user#server
The keys has been created some time ago with plain "ssh-keygen -t rsa"
I sw the error message because I copied across my ssh public key from client to server (with ssh-id-copy) without running ssh-add first, since I erroneously assumed I'd added them some time earlier.
quick note for those recently upgrading to "modern" ssh version [OpenSSH_8.1p1, OpenSSL 1.1.1d FIPS 10 Sep 2019] - supplied with fedora 31, seems not to be anymore accepting old DSA SHA256 keys (mine are dated 2006!) - created a new rsa key, public added to authorized, private on client, and everything works perfectly.
thanks for previous suggestions, especially the ssh -v has been very useful
As others have mentioned, there can be multiple reasons for this error.
If you are using SSH with Smart Card (PIV), and adding the card to ssh-agent with
ssh-add -s /usr/lib64/pkcs11/opensc-pkcs11.so
you may get the error
sign_and_send_pubkey: signing failed: agent refused operation
from ssh if the PIV authentication has expired, or if you have removed and reinserted the PIV card.
In that case, if you try to do another ssh-add -s you will still get an error:
Could not add card "/usr/lib64/opensc-pkcs11.so": agent refused operation
According to RedHat Bug 1609055 - pkcs11 support in agent is clunky, you instead need to do
ssh-add -e /usr/lib64/opensc-pkcs11.so
ssh-add -s /usr/lib64/opensc-pkcs11.so
Another reason for this is OpenSSH v9.0's new default of NTRU primes + x25519 key exchange, in combination with gpg-agent (at least, as at v2.2.32).
To work-around, disable the new key exchange algortihm (and thus it's security benefit) thus:
ssh -o 'KexAlgorithm -sntrup761x25519-sha512#openssh.com' [...]
(or the same in SSH config.)
cf. https://unix.stackexchange.com/questions/701131/use-ntrux25519-key-exchange-with-gpg-agent
According to Github security blog RSA keys with SHA-1 are no longer accepted.
Use the following command to create new SSH key with ECDSAencryption and add it to Github.
ssh-keygen -t ecdsa -b 521 -C "your_email#example.com"
original answer with details can be found here
This could cause by 1Passsword not support ssh-rsa key exchange. They support newer rsa-sha-512 and rsa-sha-256 with security considerations.
https://1password.community/discussion/comment/632712/#Comment_632712
Just to toss another cause into the ring...
My env was configured to use a Gemalto card...but I had an old keypair named id_rsa_gemalto_old(.pub) in my ~/.ssh/ and that -- having gemalto in the name -- was enough for git fetch to result in sign_and_send_pubkey: signing failed: agent refused operation.
(Ubuntu 18.04.6)
So, I just do trial GCloud service, and try connect via ssh. At the first time I forget my username of my Mac, so I did it wrong by doing this:
doe-MacBook-Pro:Documents does$ ssh -i ~/.ssh/google_compute_engine xxxx#111.111.111.111
Warning: Identity file /Users/does/.ssh/google_compute_engine not accessible: No such file or directory.
The authenticity of host '111.111.111.111 (111.111.111.111)' can't be established.
ECDSA key fingerprint is SHA256:xxxxxxxxxxxxxxxxxxxxxxxx.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no': yes
Warning: Permanently added '111.111.111.111' (ECDSA) to the list of known hosts.
Permission denied (publickey).
then I know my username, I tried:
doe-MacBook-Pro:Documents does$ ssh -i ~/.ssh/google_compute_engine does#111.111.111.111
Warning: Identity file /Users/does/.ssh/google_compute_engine not accessible: No such file or directory.
Permission denied (publickey).
and it gives me error. Can you tell me how can I solve this issue?
This has nothing to do with the ssh username.
Check two things first and we can go from there:
Permission: should be readable by you, i.e., at least 0400.
File: does it exist at all?
Problem SOLVED!
I forget didn't completed my gcloud compute ssh project-name command.
After I finished with the command, it creates file google_compute_engine.
Now I finally can connect to my Google Cloud via SSH.