PowerBuilder

Multi-Hop SSH (SSH Through SSH)

See more SSH Examples

Demonstrates how to SSH through one SSH server to get to another SSH server. The scheme looks like this:

Application => ServerSSH1 => ServerSSH2

The ConnectThroughSsh method is added in Chilkat version 9.5.0.55 to accomplish this task. Technically, it should be possible to chain any number of servers using the ConnectThroughSsh multiple times:

Application => ServerSSH1 => ServerSSH2 ==> ServerSSH3 => ... => ServerSSHN

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Ssh1
string ls_Hostname
string ls_Port
oleobject loo_Ssh2
integer li_ChannelNum

li_Success = 0

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loo_Ssh1 = create oleobject
li_rc = loo_Ssh1.ConnectToNewObject("Chilkat.Ssh")
if li_rc < 0 then
    destroy loo_Ssh1
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Hostname may be an IP address or domain name:
ls_Hostname = "192.168.1.108"
ls_Port = 22

// Connect directly to the 1st SSH server:
li_Success = loo_Ssh1.Connect(ls_Hostname,ls_Port)
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

// Wait a max of 15 seconds when reading responses..
loo_Ssh1.IdleTimeoutMs = 15000

// Authenticate using login/password:
li_Success = loo_Ssh1.AuthenticatePw("myLogin","myPassword")
if li_Success <> 1 then
    Write-Debug loo_Ssh1.LastErrorText
    destroy loo_Ssh1
    return
end if

// Connect through the 1st SSH connection to reach a 2nd SSH server.
// Note: Any number of SSH connections may be simultaneously tunneled through a single
// existing SSH connection.
loo_Ssh2 = create oleobject
li_rc = loo_Ssh2.ConnectToNewObject("Chilkat.Ssh")

li_Success = loo_Ssh2.ConnectThroughSsh(loo_Ssh1,"someremoteserver.com",22)
if li_Success <> 1 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

loo_Ssh2.IdleTimeoutMs = 15000

// Authenticate with ssh2...
li_Success = loo_Ssh2.AuthenticatePw("myLogin2","myPassword2")
if li_Success <> 1 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

// The application may now is connected and authenticated with ssh2.
// The application can do whatever it desires just as if it was directly
// connected to ssh2.   For example, the application might open
// a session channel to send commands or start a remote shell..
li_ChannelNum = loo_Ssh2.OpenSessionChannel()
if li_ChannelNum < 0 then
    Write-Debug loo_Ssh2.LastErrorText
    destroy loo_Ssh1
    destroy loo_Ssh2
    return
end if

// ...
// ...
// ...

// Close the connection with ssh2.  (This closes the the tunnel through ssh1.)
// The connection with ssh1 is still alive, and may be used for more connections.
loo_Ssh2.Disconnect()

// ...
// ...
// ...

loo_Ssh1.Disconnect()


destroy loo_Ssh1
destroy loo_Ssh2