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Sun, Mar 31, 2024 8:11 pm

Configuring PuTTY for X forwarding

The X Window System, aka X11 or simply X, provides a mechanism that allows you to have the graphical user interface (GUI) for an application running on a remote system to be displayed on the system on which you are running X server software. For systems running a Microsoft Windows operating system, you can use the free PuTTY program to establish a Secure Shell (SSH) connection to an SSH server and configure PuTTY to allow X forwarding so that you can run programs on the SSH server, but have their GUI displayed on the Microsoft Windows system on which you are running PuTTY.

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[/os/windows/network/ssh/putty] permanent link

Sat, Mar 02, 2024 9:01 pm

Location for PuTTY Tunnel Information

PuTTY stores information about sessions you have created to connect to a particular host in the Windows Registry at HKEY_CURRENT_USER\SOFTWARE\SimonTatham\PuTTY\Sessions. If you want to view the SSH tunnels configured for a particular host, i.e., the port forwarding settings for that host, you can navigate to HKEY_CURRENT_USER\SOFTWARE\SimonTatham\PuTTY\Sessions\SessionName\PortForwardings where SessionName is the name you have given to the session associated with the host. E.g., suppose you regularly establish an SSH connection to and have named a session for that site MySite. You could navigate to HKEY_CURRENT_USER\SOFTWARE\SimonTatham\PuTTY\Sessions\MySite\PortForwardings to find the port forwardings settings. If you had named the session My Site, there would be a %20 in the session name stored in the registry as %20 is an HTML representation for the space character. You can doubleclick on the PortForwardings key in the right pane of the registry window to see the values stored in the key. You might see something like the following:


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[/os/windows/network/ssh/putty] permanent link

Mon, Feb 29, 2016 11:07 pm

Using SSH Keys with PuTTY

PuTTY is a free and open source network utility that allows you to establish Telnet and Secure Shell (SSH) connections to servers. It is commonly used on Microsoft Windows systms, but is also available for Linux and Apple OS X systems. You can use it for interactive SSH logins where you provide a userid and password to authenticate with an SSH server, but you can also use it for public key-based logins where the server has a public key that is matched against a private key stored on the system from which you are connecting. By a mathematical calculation based on large prime numbers, the public key and private key can be matched with one another as a means of authenticating the login.

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[/os/windows/network/ssh/putty] permanent link

Sun, Feb 07, 2016 8:04 pm

Changing the appearance of a PuTTY session

If you wish to be able to easily distinguish Secure Shell (SSH) sessions to a particular server when using PuTTY, a free and open-source SSH and Telnet client application available for Microsoft Windows, OS X, and Linux systems, you can change the background color used for connections to a particular server through PuTTY's "Change Settings" option, which will allow you to change the background and foreground colors (the foreground color is used for text). Colors are specified by RGB value.

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[/os/windows/network/ssh/putty] permanent link

Fri, Jun 12, 2015 10:12 pm

Port forwarding with PuTTY

The free PuTTY program for Microsoft Windows systems allows you to establish SSH connections. The program includes port forwarding capability, so that you can forward connectivity to a port on the system running PuTTY to a port on the SSH server to which you have connected using PuTTY or even another system accessible from the SSH server. E.g., suppose you can remotely connect to a SSH server at your home or business, but you can't access a web server at home or at the business location remotely. One option you can use is have PuTTY "listen" on the system on which it runs on a port, e.g., port 8888, and for any connection to that port on the local system on which PuTTY is running, forward the connection to the remote web server through the SSH server as explained at Port forwarding to another device with PuTTY. Such port forwarding can be performed to any TCP port.

Alternatively, you can set up a SOCKS proxy using PuTTY as noted at Using PuTTY to set up a SOCKS Proxy Connection. Instructions for configuring some browsers ito use a SOCKS proxy are provided from the links below:

[/os/windows/network/ssh/putty] permanent link

Wed, Feb 25, 2015 11:22 pm

Where PuTTY Stores SSH port forwarding information

You can configure PuTTY, a free telnet/SSH client program, to port forward connections over an SSH connection by going to "SSH" then "Tunnels" when configuring a session.

PuTTY Configuration - Port Forwarding

Once you've added instances of port forwarding you can't edit those instances through the PuTTY configuration window though you can remove them and add new ones. The information for port forwarding is stored in the registry under the following key where Session_Name is the name for a stored session:


Updates are stored when you save a session.

E.g., if I saved a session with the name Omega using the tunneling configuration shown above, the registry entry at HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\Omega for a dynamic SOCKS proxy at port 1080 and forwarding for RDP using local port 30,089 forwarded to port 3389 on a system with IP address would be as follows:

Value name:PortForwardings
Value data:D1080=,L30089=

Regedit - PuTTY Port Forwardings

I could change the details for the port forwardings by editing the registry entry. I would see the changed values when I loaded the session. I could check the information from a command prompt with the following command:

C:\>reg query "HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions\Omega" /v PortForwardings

    PortForwardings    REG_SZ    D1080=,L30089=

[/os/windows/network/ssh/putty] permanent link

Sat, Oct 19, 2013 10:01 pm

Pasting from PuTTY to Linux

If you are using PuTTY for SSH or telnet connections to a Linux system and need to copy and paste text from the Microsoft Winodws system on which PuTTY is running into a file or application on a Linux system, you can paste the data you've copied into the clipboard on the Windows system into the file/application on the Linux system by hitting both buttons on your mouse simultaneously or by hitting the Shift and Insert keys simultaneously.

[/os/windows/network/ssh/putty] permanent link

Fri, May 18, 2012 11:37 pm

Port Forwarding RDP With PuTTY

You can use PuTTY, which is a free implementation of Telnet and SSH clients for Windows and Unix platforms to log into a system via SSH and by using the SSH port forwarding functionality that PuTTY provides, establish a Remote Desktop Protocol (RDP) connection through a "tunnel" you establish via the SSH connection.

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[/os/windows/network/ssh/putty] permanent link

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