Use local port forwarding when the client application is running on
the same system as the SSH client. Use remote port forwarding if the client
application is running on remotely. Local and remote port forwarding are specified
using the -"L" and -"R" options.
From an OpenVMS system to another OpenVMS system
Local port forwarding
On system VMSHOST1, enter the following command:
$ SSH -"L" 2001:localhost:23 VMSHOST2
From another window on VMSHOST1, enter the following command:
$ TELNET localhost 2001
Result: The login prompt is displayed for VMSHOST2.
Remote port forwarding
On system VMSHOST1, enter the following command:
$ SSH -"R" 2001:localhost:23 VMSHOST2
On system VMSHOST2, enter the following command:
$ TELNET localhost 2001
Result: The login prompt is displayed for VMSHOST1.
From an SSH for OpenVMS client to a non SSH for OpenVMS server
Local port forwarding
On system VMSHOST1, enter the following command:
$ SSH -"L" 2001:localhost:23 NONVMSHOST
From another window on VMSHOST1, enter the following command:
$ TELNET localhost 2001
Result: The login prompt is displayed for NONVMSHOST.
Remote port forwarding
On system VMSHOST1, enter the following command:
$ SSH -"R" 2001:localhost:23 NONVMSHOST
On the system NONVMSHOST, enter the following command:
# TELNET localhost 2001
Result: The login prompt is displayed for VMSHOST1.
From a non SSH for OpenVMS client to an SSH for OpenVMS server
Local port forwarding
On system NONVMSHOST, enter the following commands:
# SSH -L 2001:localhost:23 VMSHOST1
# TELNET localhost 2001
Result: The login prompt is displayed for VMSHOST1.
Remote port forwarding
On system NONVMSHOST, enter the following command:
# SSH -R 2001:localhost:23 VMSHOST1
On system VMSHOST1, enter the following command:
$ TELNET localhost 2001
Result: The login prompt is displayed for VMSHOST1.
