Questions tagged [ssh-agent]
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151 questions
0 votes
0 answers
54 views
ssh connection error (ssh_config attached)
(base) haohao@zhangjunhaodebijixingdiannao .ssh % sudo ssh [email protected] -v OpenSSH_9.9p1, LibreSSL 3.3.6 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: ...
- 1
0 votes
0 answers
37 views
How to unlock ssh passphrase only if it was not already added to ssh-agent?
I have a script that collects information from multiple ssh hosts at once, so it needs the ssh passphrase to be unlocked and loaded into ssh-agent before spawning connections in parallel. All hosts ...
- 101
3 votes
1 answer
531 views
How to select SSH key by fingerprint from ssh-agent, while using `IdentitiesOnly yes` option?
This would be useful in situations where: serving SSH keys via KeePass where there is no file path, and there are otherwise too many keys: as ssh tries all of them and some hosts are configured to ...
1 vote
1 answer
732 views
Even if SSH is set up, it always asks for the password when logging into the server
I have an Ubuntu server. I use ssh to access it. It worked fine at first. When user@IP is given along with SSH key, it will log into the server without asking for password. But recently, even with SSH,...
0 votes
1 answer
2k views
ssh prompts for password despite gcr-ssh-agent
I'm trying to set up GNOME-Keyring such that when it is unlocked after login, it will also allow me to use my SSH key, which is encrypted. This is a Debian 12 system. The key in question is an ed25519 ...
- 131
0 votes
1 answer
102 views
Understand SSH AgentForwarding per Host specification
Disclaimer: originally I asked this question on StackOverflow and it was legitimately marked off-topic and think it fits better here. In the meantime I found the problem (see intermediate solution ...
- 103
2 votes
0 answers
413 views
PuTTY, Cygwin, ssh-pageant: unable to connect to pipe, error: 3
On a new Windows 11 system, with Cygwin, using the ssh-pageant version 1.4 which comes with Cygwin, I cannot make it work with PuTTY 0.80. The ssh client reports "unable to connect to pipe, error:...
- 121
1 vote
2 answers
747 views
SSH agent forwarding when Host and Hostname different
On my client I have an SSH agent setup and the following example config Host gitserver Hostname gitserver.example.com ForwardAgent yes User git IdentityFile C:\Users\user\.ssh\id_rsa.pub ...
- 21
1 vote
1 answer
14k views
What is the host key (the one from ssh connection) and how is it different from public-private key pair?
The situation is that I've had a VPS created previously. It was all set up, private-public key authentication, root login turned off, password login turned off. Everything was set up. Then this server ...
- 197
1 vote
1 answer
569 views
The ssh-agent process is not visible to the user who created it but is visible to root
I have adopted the following snippet from Visual Studio Code's documentaion to create an ssh-agent on login: if [ -z "$SSH_AUTH_SOCK" ]; then # Check for a currently running instance of ...
- 111
3 votes
2 answers
2k views
Avoid SSH AgentForwarding of incompatible keys
Good morning, I have one ed25519-sk key (using a hardware token), which I need only on my personal machine for some high security servers (all Debian). This key type is supported by OpenSSH 8.3+. We ...
- 555
2 votes
1 answer
791 views
How to create an SSH tunneling agent via HTTPS?
How to allow SSH when the network is blocked on all ports except HTTP and HTTPS? I'm curious to know how I can create a SSH tunnel which allows me to SSH via 443 and will work even after the server is ...
- 21
0 votes
0 answers
926 views
Can't ssh into cloud shell
I try to ssh from my local host to GCP cloud shell and get the error: $ gcloud cloud-shell ssh --authorize-session sign_and_send_pubkey: signing failed for RSA "/home/kossak/.ssh/...
google-cloud-platform
5 votes
1 answer
9k views
How to check if SSH agent forwarding is running, from the remote server?
Locally, I've turned on the SSH agent and I've added my key: $ eval $(ssh-agent) Agent pid 80 $ ssh-add Identity added: /c/Users/...../.ssh/id_rsa (.....@........) In my ~/.ssh/config, I have this: ...
- 171
0 votes
1 answer
127 views
Cannot add passwordless private key with ssh-add on remote server
I can add a passwordless id_ed25519 file locally using ssh-add -k, but not on my remote server. Locally: ☁ ~ ssh-add -l The agent has no identities. ☁ ~ ssh-add -k ~/.ssh/id_ed25519 Identity added:...
- 103
10 votes
4 answers
14k views
SSH Agent forwarding not working on Ubuntu 22.04
I am trying to connect to github over ssh on my remote server (Running Ubuntu 22.04). On my local computer (Running Win 10), I have ~/.ssh/config file with the following: Host remote HostName ...
- 243
0 votes
1 answer
1k views
openssh connection from windows with yubikey ED25519-SK denied
I use my yubikey to authenticate against remote hosts with ssh. This works (with the same keys) on Linux, and it fails on Windows, with git-bash. all this is on windows 10, and this is OpenSSH_9.0p1, ...
- 143
4 votes
1 answer
3k views
SSH agent: `sign_and_send_pubkey: signing failed for ECDSA-SK ... from agent: agent refused operation` except very first time
I have an ecdsa-sk keypair that I generated and added to my github account (tied to a yubikey). If I try any connection using that key, such as git push, I get: sign_and_send_pubkey: signing failed ...
- 143
1 vote
0 answers
553 views
How to send different explicit ssh identities *from agent* to same server?
Some services like github and gitlab distinguish between users based on the SSH identity sent. One way to do this is to have different host aliases in ~/.ssh/config: Host user1-github HostName github....
- 123
0 votes
0 answers
217 views
Is there a way to repair SSH On GCP VM after shielded VM failure
I have a GCP VM on which is installed a Docker with Drupal. e2-medium with SSD 10Go After increasing the disk size to 20GB, I can no longer access the VM in SSH. My VM was failing to boot because of a ...
0 votes
1 answer
280 views
How to forward the .config file to remote host together with the agent?
I have a GitLab server configured on a non-standard port. I am using ssh protocol to clone and push, and I have configured the correct port entry in the .config file of ssh. Now, I need to connect to ...
15 votes
1 answer
129k views
Pass password in ssh config
Is there any way to pass a password using .ssh/config? I'm trying to set up a way to login to a server under a specific user and then switch automatically to root when I connect (need to input ...
- 151
0 votes
1 answer
619 views
ssh TOTP connection with jump host forwarding
How can I simplify this? Perhaps using agent forwarding? I have an SSH jump host with 2FA via TOTP x2 and a machine which uses 2FA as well(jump host and machine): ssh [email protected] -L 22222:...
- 103
2 votes
1 answer
317 views
What is GPG equivalent of ssh-add?
When using password-secured SSH keys I can use ssh-add to preemptively unlock a key before it needs to be used and have it cached in ssh-agent for future use. What is a GPG equivalent of ssh-add? I ...
- 257
0 votes
1 answer
236 views
DigitalOcean Droplet ssh to use a named key
It's been a while since I've done this and configured ssh keys. I generated an ssh key with a different file name than id_rsa I have a DigitalOcean Droplet where I placed a named ssh key pair on ...
- 103
0 votes
0 answers
1k views
The ssh agent cannot 'resolve hostname' when called from within a bash script
I have a bash script #!/bin/bash scp -r some_directory remote_host:~ which I made executable with chmod u+x. The remote_host has been defined in my .ssh/config as follows: Host remote_host HostName ...
- 105
1 vote
1 answer
1k views
How to specify identity when using SSH agent?
I've got a slightly unusual use-case... I'm using SSH via certificates, (where the authentication mechanism isn't just a signature from a private key, but also presentation of a signed cert). I have ...
- 163
0 votes
2 answers
615 views
Why isn't ssh-agent a background process by default?
I have always wondered why such a basic feature (loading ssh keys for persistent usage) requires a clunky command to execute in the background of a cmdline. Why isn't ssh-agent a service (for example) ...
- 133
6 votes
0 answers
2k views
How to use Windows 10 OpenSSH ssh-agent service with Cygwin?
I'm using the Visual Studio Code Remote - SSH extension on a Windows 10 laptop to access a bunch of Linux development servers. I followed these instructions to set up the Windows built-in ssh-agent ...
- 320
0 votes
1 answer
1k views
Avoid use of SSH agent
I use ProxyCommand with the intention of avoiding ssh agent forwarding. Today I noticed that Gnome was starting ssh-agent, which I'm trying to avoid using so I disabled it. I'd like to not have the ...
- 127
6 votes
1 answer
17k views
ssh-add returns "Error connecting to agent: No such file or directory" even though agent is running
Windows 10 20H2, build 19042.685 I'm trying to use the SSH agent in the built-in OpenSSH client on Windows 10. The agent is running: C:\Users\Daniel> Get-Service | ?{$_.Name -like '*ssh-agent*'} ...
- 554
2 votes
0 answers
1k views
Check if ssh-agent forwarding is allowed on server with restricted permissions
How can I, as a user logged in to a remote server via ssh, check if ssh-agent forwarding is permitted on that server? Restrictions: The tool 'sshd_config' either doesn't exist on this system, or I ...
- 121
0 votes
1 answer
617 views
automatic SSH login with ssh key's dont work after sudo
I have an Ansible server with 3 ubuntu servers (hosts). So i want to be able to logon to those servers by typing in the SSH key password once. I have edited my .bashrc with an alias. alias ssha='eval $...
7 votes
1 answer
4k views
Does SSH allow jump host to access forwarded agent?
If I SSH to targethost via jumphost with agent forwarding enabled, will jumphost have access to my SSH key agent? ssh -A -J user1@jumphost user2@targethost Is this still secure, if I don't fully ...
- 171
3 votes
0 answers
2k views
SSH freezes after couple of lines printing
I am having this weird issue with a server whenever I try to open htop over ssh it hangs, ls works but ls -l hangs after couple of line if I execute history it hangs after printing 50+ line. But mosh ...
3 votes
1 answer
1k views
How can I use different ssh keys for user1@host and user2@host, without resorting to aliased hostnames?
I have a remote CentOS server, lets pretend it's called hostname.com hostname.com has several user accounts, and I want to ssh into this server as any one of these users (using ssh keys rather than ...
- 561
3 votes
1 answer
7k views
Reconnect automatically to a disconnected ssh session [closed]
I am new to this community , I am working on my iot project in which my microcontroller is working as a server, taking data and executing request. My client is end device (mobile,tablet) and I am ...
- 31
16 votes
3 answers
10k views
How to prioritize explicit ssh key from commandline over ssh-agent keys?
I have a bunch of ssh keys loaded semi-permanently into ssh-agent. ssh-add -L lists 6 keys. I also have other keys which are stored separately; let's say, on a USB stick. I exactly don't want to keep ...
- 507
1 vote
2 answers
4k views
Ansible not honouring `ssh-agent`?
I seem to be having a problem where Ansible isn't using my SSH agent cache. I've run the following: eval `ssh-agent` ssh-add /tmp/key Then I successfully log into one of the hosts from my inventory ...
- 473
0 votes
1 answer
3k views
How to connect GCP, VM machine with WinSCP
I created Virtual machine (VM) instance in the GCP but unable to connect with WinSCP from the windows machine. I created on VM instance in the GCP then generated pub key by using command ssh-keygen ...
0 votes
1 answer
1k views
Using Password-Protected SSH Keys for Unattended Scripts on Remote Server
From PC1, I SSH into SERVER1 where I have a bash script, that will SSH & auth to SERVER2 using an SSH-key that's password-protected. Everything works fine when I manually execute my script, using ...
1 vote
0 answers
389 views
SSH agent forwarding not working on LSF when using BSUB
At my institute we have a cluster that runs LSF. Via this cluster, I want to connect to other computers/servers using Agent Forwarding. This works fine when I am on the login node, however when I am ...
- 11
2 votes
4 answers
8k views
Running ssh-add from git bash using Windows 10's OpenSSH
I've setup OpenSSH following the 2019 Update of this question including setting GIT_SSH=C:\Windows\System32\OpenSSH\ssh.exe. Which works great, except when using when using git from git bash I get ...
- 121
2 votes
1 answer
3k views
too many ssh-agent process per user on several servers [closed]
Several users seem to have problems with the usage of ssh-agent in their login environment. sri for instance has 1295 of them running on login02. And many other users are having same issue. I am ...
- 23
1 vote
0 answers
2k views
Configure ssh-agent for TeamCity agent
I have TeamCity agents installed on a CentOS 7.3 server, and am trying to use the "SSH agent" build feature for a script that uses scp. However, it always fails due to a TimeoutException: [12:39:32] ...
- 1,034
1 vote
1 answer
1k views
SSH agent forwarding is not working when SVN+SSH
I'm trying to automate the deployment of an SVN repository (with a web app) over multiple production servers, without installing any private key on the servers. The SVN server is hosted on srv3, and ...
1 vote
1 answer
727 views
Is there a way to do SSH password-less login when the server only allows keyboard-interactive authentication?
Suppose I've got a server foo.com which only allows keyboard-interactive authentication, and that I can't change this. This means I can do, sshpass -p PASSWORD ssh foo.com but I can't create public/...
- 111
3 votes
1 answer
3k views
rsync not using the ssh-agent?
I have this running on gitlab ci, and it works for regular ssh (copied from the gitlab ci docs): eval $(ssh-agent -s) ssh-add <(echo "$SSH_PRIVATE_KEY") mkdir -p ~/.ssh echo -e "Host *\n\...
- 471
1 vote
2 answers
1k views
How to keep ssh-agent always runnning on Ubuntu server
I'm trying to set up backing up some folder from one server (target server) to another (backup server) using rsync. I also need to call rsync from backup server so it's easier to maintain backup ...
- 111
3 votes
1 answer
2k views
SSH ignores key in agent and keeps asking for key decryption password
In my ssh_config, I have configured SSH to use a specific key when connecting to a host. I want SSH to try only this key, not any other key it may find (in ssh agent or some other location), so I ...
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