[SOLVED] Connection to SSH from a pipeline in Azure DevOps is still not working

Issue

I saw few other posts (in particular this one) about it but there are from last year. I still have this issue right now. I opened the Preview features from the User settings but I can't turn off this feature.

My pipelines use SSH connection to run some commands on a virtual machine (basically, pull a Docker image).

All my pipelines are failing. How can I fix it or update the SSH connections?

Update

I set up the Service connection

and I use it in my pipelines with this YAML code:

- task: SSH@0
  displayName: 'SSH: stop shinyproxy'
  inputs:
    sshEndpoint: $(server)
    commands: |
      echo $(pwd) | sudo -S docker stop shinyproxy
    failOnStdErr: false
  continueOnError: true

All pipelines, new and old, get the same error

##[error]Failed to connect to remote machine. Verify the SSH service connection details. Error: Error: All configured authentication methods failed

at doNextAuth (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/client.js:803:21)

at tryNextAuth (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/client.js:993:7)

at USERAUTH_FAILURE (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/client.js:373:11)

at 51 (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/protocol/handlers.misc.js:337:16)

at Protocol.onPayload (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/protocol/Protocol.js:2025:10)

at AESGCMDecipherNative.decrypt (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/protocol/crypto.js:987:26)

at Protocol.parsePacket [as _parse] (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/protocol/Protocol.js:1994:25)

at Protocol.parse (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/protocol/Protocol.js:293:16)

at Socket. (/home/vsts/work/_tasks/SSH_91443475-df55-4874-944b-39253b558790/0.213.0/node_modules/ssh2/lib/client.js:713:21) at Socket.emit (node:events:527:28) {

level: 'client-authentication'

I have never had this issue before.

Solution

Based on the other post, highlighted by Antonia, the solution has to be applied on the Ubuntu machine.

To fix it, open Terminal and edit /etc/ssh/sshd_config and, at the end of it, add this line

PubkeyAcceptedKeyTypes=+ssh-rsa

After that, restart. It is working for me.

Answered By - Enrico

Answer Checked By - Candace Johnson (WPSolving Volunteer)