SSH ProxyJump option
The ProxyJump defines a bastion host (jump host, jump server, jump box) to use.
Values
| Value | Meaning |
|---|---|
| none | Disable ProxyJump functionality |
| HOST | Define the hostname of the bastion host |
| [USER]HOST[:PORT] | Define one or more parameters of the bastion host |
| URI | Define parameters in URI format |
Hostname
Format: hostname
User
Format: user@hostname
Port
Format: hostname:port
Command-line usage
ssh -J bastion destinationsystem
These parameters can also be specified in the format as a URI .
ssh -J ssh://user@hostname:port destinationsystem
Configuration file
While command-line usage is available, typically the settings for a bastion host are stored in your local SSH configuration file.
Host jumphost
HostName jumphost.example.com
Host webserver
HostName webserver.example.com
ProxyJump jumphost
ProxyCommand versus ProxyJump
Before the ProxyJump option was available, jumping was done via the ProxyCommand option.
When both options are set, then the first one available will be used.
