Tunnel goes up to the host db access via the proxy command. The connection looks like the ASCII art below. The comments, agent forwarding must be enabled on the bastion hosts to Host and have the appropriate keys loaded. L 6035:DBHOST:3306 For a password less login peagent must be running on the desktop With the -nc option to create a tunnel up to the db access host.įor your topology the command executed on desktop machines this on theĬommand prompt looks like this: plink -A ^ It doesĮxecute a local command and uses it as a proxy. Unfortunately there is not much help for the -proxycmd option. Using this new functionality yields a more robust less L $ the release of PuTTY 0.68 plink got a new command line optionĬalled -proxycmd. I am looking for a putty/plink solution for use for access from windows boxes. ![]() Then, SSH creates a separate tunnel inside the existing SSH session that redirects incoming traffic in the remote port to localhost. When remote port forwarding is used, at first, the client connects to the server with SSH. I am able to connect to it with ssh from my Mac (code shown below), so I know that the current configuration of the boxes permits this kind of access. Also often called SSH reverse tunneling, remote port forwarding redirects the remote servers port to the localhosts port. What is the (probably very lengthy) putty and/or plink command line that will enable this?įrom my interpretation of the manual, I've tried this: plink -ssh -2 -i C:\temp\key.ppk -agent -A -t -l user -L 6035:127.0.0.1:6035 ssh -v -L 6035:DBHOST:3306 gets me to the bastion, but it then looks for a private key on the bastion to make the connection to db access. ppk files for the private keys that the script can refer to. To make this as easy to deploy as possible, I want to specify all the configuration on the command line without referring to any saved session data configured in the Putty UI. My co-workers will then use this connection in a desktop db query tool. The Plink code looks like this: plink.exe -ssh username hostname -L 3307:127.0.0. Not sure what is right syntax for three hops, as it need nested quotes and I do not know the. For two hop (an equivalent of rootVPS3 -J rootVPS1,rootVPS2) you can use proxy command like: plink rootVPS2 -proxycmd 'plink rootVPS1'. ![]() │ desktop │───>│ bastion │────>│ db access │────>│ db 3306 │ 1 I am trying to open an SSH tunnel via Plink in the command line to run a few R scripts and I cannot get the R scripts to run and when they do run the tunnel was not created, so the connection to my database crashes. Though this can be achieved more easily using 'SSH to proxy and use port forwarding'. I need to write a script for some co-workers to connect over the following topology, using a private key for authentication (the same key for each person works on both bastion and db access): ┌────────────┐ ┌────────────┐ ┌────────────┐ ┌────────────┐
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