dtm37893
2015-10-09 14:15
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使用golang反向SSH

I have a server and a remote computer. Now I want to access the remote computer via SSH but it is possible that it is behind a NAT. That's one of the reasons I want a reverse SSH connection.

The idea is to establish a connection from the remote computer to the server and use this connection to communicate via SSH from the server to the remote computer.

With OpenSSH this is quite easy. From the remote computer I open the reverse SSH tunnel:

ssh- R 19999:localhost:22 user@192.168.0.10

Now I can use this from the server side with:

ssh localhost -p 19999

I want to achieve the same behavior with a go application and the go SSH library on the remote computer. The server will still use OpenSSH so it should not be changed.

I know how to connect to a computer via SSH from go but how can the reverse part be achieved?

func main() {
    config := &ssh.ClientConfig{
        User: "vagrant",
        Auth: []ssh.AuthMethod{
            ssh.Password("vagrant"),
        },
    }

    conn, err := ssh.Dial("tcp", "192.168.0.10:22", config)
    if err != nil {
        panic("Failed to dial: " + err.Error())
    }
}

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