In the example below, we will set up the SSH config file to jump a single-intermediary server ("jumpserver" in this case) and log in to a host called "remoteserver" on port "2048" as a user named "dev". Luckily, OpenSSH allows configuring ProxyJump or Prox圜ommand via the SSH client config file (usually ~/.ssh/config). It can be tedious to configure jump routes between each new SSH connection. It should look similar to this: Prox圜ommand C:\Windows\System32\OpenSSH\ssh.exe -W %h:%p Ĭonfiguring ProxyJump and Prox圜ommand in the SSH client config file If you’re using OpenSSH on a Windows machine, you must include the full SSH file path in the Prox圜ommand directive. $ ssh -J, īelow is a sample usage of Prox圜ommand command. $ ssh -J īelow is a sample usage of ProxyJump command for jumping between multiple hosts. Internally, ProxyJump wraps the Prox圜ommand in a secure and easy directive.īelow is a sample usage of the ProxyJump command. Prox圜ommand works by forwarding standard in and standard out (stdio) through an intermediate host. Before ProxyJump was released, Prox圜ommand was the way to jump hosts. But ProxyJump is available only since OpenSSH version 7.5, and the feature requires port forwarding to be supported by intermediate hosts. ProxyJump is the easiest and recommended way to jump between hosts because it ensures that traffic passing through the intermediate hosts is always encrypted end-to-end. If you are new to jump servers, read our tutorial on how to set up a jump server and learn some of the best practices to secure them. OpenSSH ProxyJump and Prox圜ommand directives tell the SSH client how to connect to a remote server via an intermediary server - often called a jump host, jump server, or bastion server.
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