Updated README
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README.md
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README.md
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# docker-ssh-jumphost
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# docker-ssh-jumphost
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Dockerfile for building an image that runs an OpenSSH server that's configured to act as a ProxJump host only.
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The server listens on püort 2222. The only user that is able ta connect is _bastion_. It is not possible to get a terminal on the host. It is only suitable to ProxyJump to other hosts.
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At the first startup the host SSH keys will be created in _/config_ as well as an _authorized_keys_ file.
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Just build the image, define a volume oder bindmount for _/config_ and add your public key the _authorized_keys_ file.
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Expose port 2222 and you can connect as user _bastion_ with your defined private key.
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## Sample config for _docker-compose_
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```yml
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version: "3"
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services:
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ssh-jumphost:
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container_name: ssh-jumphost
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build:
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context: https://github.com/chrisb86/docker-ssh-jumphost.git
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volumes:
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- ./config:/config
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ports:
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- 2222:2222
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tmpfs:
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- /tmp
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- /run
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- /var/tmp
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read_only: true
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```
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In this example the whole conntainer is readonly and directories that have to be writable are mounted with tmpfs.
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Just create the _docker-compose.yml_ run `docker-compose up -d --build`and you're done.
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