# Server rejected the 1 private key(s) for jenkins (credentialId:jenkins/method:publickey)

**URL:** <https://community.jenkins.io/t/server-rejected-the-1-private-key-s-for-jenkins-credentialid-jenkins-method-publickey/17466>\
**Category:** Ask a question\
**Tags:** question, docker\
**Created:** [July 24, 2024, 3:45pm UTC](https://community.jenkins.io/t/server-rejected-the-1-private-key-s-for-jenkins-credentialid-jenkins-method-publickey/17466 "2024-07-24T15:45:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Trailing](https://avatars.discourse-cdn.com/v4/letter/t/a9a28c/32.png) [@Trailing](https://community.jenkins.io/u/Trailing)\
**Post date:** [July 24, 2024, 3:45pm UTC](https://community.jenkins.io/t/server-rejected-the-1-private-key-s-for-jenkins-credentialid-jenkins-method-publickey/17466/1 "2024-07-24T15:45:45Z")

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Hi, I am getting the error `Server rejected the 1 private key(s) for jenkins (credentialId:jenkins/method:publickey)` When I attempt to connect an agent. The agent and Jenkins are hosted on the same machine. I followed [this](https://www.jenkins.io/doc/book/using/using-agents/) guide for creating the agent in a docker container. Jenkins is not in a docker container. I used the ssh-keygen command to make the key, both as RSA and as ED25519. The command to create the docker:

```auto
docker run -d --rm --name=agent1 -p 4444:22 \
-e "[PUBLIC KEY]" \
jenkins/ssh-agent:alpine-jdk17

```

I provided the SSH credentials with the username jenkins. I used the /home/ec2-user as I am hosting all of this on AWS EC2. I used host localhost. I have tried opening port 22 and port 4444. I am using port 4444 as I am SSHing into the instance on port 22 myself. I did find a stack overflow post for the error, but to no avail. Any ideas on what may be the issue?