JarCasting
SSH Proxy
A pure Java implementation for SSH port tunneling that is able to understand OpenSSH configurations which involve multiple hops to reach a target host. This library essentially combines JSch with the ability to understand ProxyJump or ProxyCommand configurations in your local ~/.ssh/config file.
Usage
Add the following Maven dependency to your project:
<dependency>
<groupId>de.cronn</groupId>
<artifactId>ssh-proxy</artifactId>
<version>1.6</version>
</dependency>
Example
# cat ~/.ssh/config
Host jumpHost1
User my-user
HostName jumphost1.my.domain
Host jumpHost2
User other-user
ProxyJump jumpHost1
Host targetHost
ProxyCommand ssh -q -W %h:%p jumpHost2
try (SshProxy sshProxy = new SshProxy()) {
int targetPort = 1234;
int port = sshProxy.connect("jumpHost2", "targetHost", targetPort);
try (Socket s = new Socket(SshProxy.LOCALHOST, port)) {
OutputStream out = s.getOutputStream();
InputStream in = s.getInputStream();
// ...
}
}
Dependencies
- Java 8+
- JSch (with JZlib)
