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Franck Dernoncourt
Asked: 2016-03-23 20:20:52 +0800 CST

Converting SSH command to a PuTTY command

  • 772

I am trying to translate the SSH command:

ssh -N -L 1521:server1.com:1521 [email protected]

into PuTTY.

  • -N: Do not execute a remote command. This is useful for just forwarding ports (protocol version 2 only).
  • -L [bind_address:]port:host:hostport: Specifies that the given port on the local (client) host is to be forwarded to the given host and port on the remote side.

The command first SSH to [email protected], which in turn connect to server1 so that it fowarrds port 1521 (server behind NAT).

In a more abstract way, the command could be written as:

ssh -L MY_LOCAL_PORT:FOREIGN_ADDRESS:FOREIGN_PORT MYUSER@SSH_SERVER

I tried to write the following PuTTY command:

putty -N -D 1521 -P 1521 server2.com [email protected]

with:

  • -N: suppress starting a shell or command.
  • -D: set up SOCKS-based dynamic port forwarding on a local port.
  • -P: specify a port number

according to the PuTTY manual.

However I get:

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What could be the issue?

I disabled the firewall, and checked that putty.exe allowed to communicate with Internet.

Using the PuTTY GUI, the tunnel works with the following configuration:

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ssh

3 Answers

  1. Best Answer

    I am trying to translate the SSH command ssh -N -L 1521:server1.com:1521 [email protected] into PuTTY.

    If all you need is just forwarding port - you can use plink instead

    > plink.exe -ssh -N -L 1521:server1.com:1521 [email protected]

    I'd curious how to fix the putty.exe command as well

    the same things

    > G:\putty.exe -ssh -P 2222 -N -L :2222:192.168.88.130:2222 [email protected] -i C:\Users\ALex\.ssh\node1.ppk

    enter image description here

    • 6

  2. Putty requires the protocol to be mentioned as well. Since you are using ssh, add '-ssh' option as well. You can refer the following link :

    putty command line options

    So a simple command would look like:

    putty.exe -ssh -P 22 admin@server
    • 1

  3. It might have to do with your ability/inability to assign a port on the local computer. Try running puTTy with administrative privileges on your local machine.

    • 0