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PuTTY Download - The Ultimate SSH and Telnet Solution for Windows



How to Download and Install PuTTY on Windows




If you need to connect to a remote computer or device over an unsecure network, such as SSH, Telnet, rlogin, or SCP, you may want to use PuTTY, a free and open-source terminal emulator for Windows. In this article, we will show you how to download and install PuTTY on your Windows system, and how to use it for SSH connections.


What is PuTTY and why use it?




PuTTY is a software application that allows you to connect to a remote computer or device using various network protocols, such as SSH, Telnet, rlogin, and SCP. It can also connect to a serial port. PuTTY works on Windows and UNIX platforms and uses an xterm terminal emulator. The name "PuTTY" has no official meaning.




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PuTTY features and benefits




PuTTY supports many variations on the secure remote terminal, and provides user control over the SSH encryption key and protocol version, alternate ciphers such as AES, 3DES, RC4, Blowfish, DES, and Public-key authentication. PuTTY uses its own format of key files PPK (protected by Message Authentication Code).


PuTTY also supports SSO through GSSAPI, including user provided GSSAPI DLLs. It also can emulate control sequences from xterm, VT220, VT102 or ECMA-48 terminal emulation, and allows local, remote, or dynamic port forwarding with SSH (including X11 forwarding). The network communication layer supports IPv6, and the SSH protocol supports the zlib@openssh.com delayed compression scheme. It can also be used with local serial port connections.


PuTTY comes bundled with command-line SCP and SFTP clients, called "pscp" and "psftp" respectively, and plink, a command-line connection tool, used for non-interactive sessions. PuTTY does not support session tabs directly, but many wrappers are available that do.


PuTTY alternatives




While PuTTY is one of the most reliable terminal emulators, it has its limitations. Fortunately, plenty of alternatives offer a more streamlined interface and a wider array of features. Some of the best PuTTY alternatives are:


  • Solar-PuTTY: A free software solution for Windows that includes a protected terminal emulator plus SCP and SFTP. It supports automatic login and reconnect, post-connection scripts, backup or migration of saved sessions, and customizable appearance.



  • Bitvise SSH Client: A free SSH and SFTP client for Windows that supports single-click remote desktop forwarding, auto-reconnecting capability, dynamic port forwarding through an integrated proxy, an FTP-to-SFTP protocol bridge, scripting using sexec, stermc, and stnlc.



  • KiTTY: A fork of the original PuTTY client that adds many extra features to the original software. It supports built-in chat system and text editor, login scripts, command automation and shortcuts, session filtering and auto-saving.



  • SuperPuTTY: A graphical user interface that allows you to manage multiple PuTTY sessions from one window. It supports drag-and-drop operations for organizing sessions.



How to download PuTTY




To download PuTTY on your Windows system, you need to follow these steps:


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Choose the right version for your system




PuTTY is available in different versions for different versions of Windows, such as 32-bit, 64-bit, or ARM. You need to choose the version that matches your system architecture. To check your system type, you can follow these steps:


  • Press the Windows key + R to open the Run dialog box.



  • Type msinfo32 and click OK to open the System Information window.



  • Look for the System Type entry under the System Summary section. It will show you whether your system is x86-based (32-bit) or x64-based (64-bit).



If you have an ARM-based system, such as a Surface Pro X, you need to download the ARM version of PuTTY.


Download the installation package from the official website




Once you know your system type, you can download the PuTTY installation package from the official website:


On this page, you will see different download options for PuTTY. You can choose either the MSI installer or the ZIP archive. The MSI installer is recommended for most users, as it will install PuTTY and all its components automatically. The ZIP archive is useful if you want to run PuTTY without installing it, or if you want to copy it to a USB drive or another computer.


To download the MSI installer, click on the link that corresponds to your system type. For example, if you have a 64-bit system, click on putty-64bit-0.76-installer.msi. This will start the download process and save the file to your default download location.


How to install PuTTY




To install PuTTY on your Windows system, you need to follow these steps:


Run the installer and follow the steps




After downloading the MSI installer, locate it in your download folder and double-click on it to launch it. You may see a User Account Control prompt asking for permission to run the installer. Click Yes to continue.


The PuTTY Setup Wizard will open and guide you through the installation process. Click Next to proceed.


On the next screen, you can choose the destination folder where PuTTY will be installed. The default location is C:\Program Files\PuTTY\. You can change it by clicking on Browse and selecting a different folder. Click Next to continue.


Customize the installation options if needed




On the next screen, you can customize the installation options for PuTTY. You can choose which components to install, such as PuTTY itself, PuTTYgen (a key generator tool), Pageant (an SSH authentication agent), and PSCP/PSFTP (command-line SCP and SFTP clients). You can also choose whether to create shortcuts on the Start Menu and/or Desktop, and whether to associate PuTTY with SSH and Telnet URLs. By default, all options are selected. You can uncheck any option that you don't need. Click Next to continue.


On the next screen, you can choose whether to create a PuTTY folder in your Documents folder. This folder will store your saved sessions and configuration settings for PuTTY. By default, this option is enabled. You can disable it by unchecking the box. Click Next to continue.


On the final screen, you can review your installation settings and click Install to start the installation process. Wait for a few seconds until the installation is complete.


How to use PuTTY for SSH connections




To use PuTTY for SSH connections, you need to follow these steps:


Launch PuTTY and enter the host name or IP address




After installing PuTTY, you can launch it from the Start Menu or Desktop shortcut. You will see the PuTTY Configuration window with various options and settings.


To connect to a remote computer or device using SSH, you need to enter its host name or IP address in the Host Name (or IP address) box under the Session category. You can also specify a port number if it is different from the default 22.


Accept the security alert if prompted




If this is your first time connecting to this host, you may see a security alert warning you that PuTTY does not recognize its public key fingerprint. This is normal and expected, as PuTTY needs to verify that you are connecting to the right host and not a malicious one.


To accept the security alert and continue with the connection, click Yes. This will add the host's public key fingerprint to PuTTY's cache and prevent this alert from appearing again in future connections.


Enter Enter your login credentials and start using SSH




After accepting the security alert, you will see a terminal window with a login prompt. You need to enter your username and password for the remote host. If you have set up public-key authentication, you may not need to enter your password, or you may need to enter a passphrase for your private key.


Once you are logged in, you can start using SSH commands to interact with the remote host. You can also use PuTTY's menu bar to access various options and settings, such as changing the font size, copying and pasting text, saving the session, and more.


Conclusion




PuTTY is a powerful and versatile terminal emulator that allows you to connect to remote computers or devices using various network protocols, such as SSH, Telnet, rlogin, and SCP. It is free and open-source, and works on Windows and UNIX platforms. In this article, we showed you how to download and install PuTTY on your Windows system, and how to use it for SSH connections. We hope you found this article helpful and informative.


FAQs




Q: How can I save my PuTTY sessions for future use?


  • A: You can save your PuTTY sessions by entering a name in the Saved Sessions box under the Session category, and clicking Save. This will store your host name, port number, protocol, and other settings for that session. To load a saved session, select it from the list and click Load.



Q: How can I generate SSH keys using PuTTY?


A: You can generate SSH keys using PuTTYgen, a key generator tool that comes with PuTTY. To launch PuTTYgen, go to the Start Menu and search for PuTTYgen. Then, follow these steps:


  • - Select the type of key you want to generate (RSA, DSA, ECDSA, or ED25519) from the Parameters section. - Click Generate and move your mouse randomly over the blank area to create randomness for the key. - Enter a passphrase for your key if you want to protect it with encryption. - Click Save public key and Save private key to save your keys in PPK format. - Copy the text in the Public key for pasting into OpenSSH authorized_keys file box and paste it into the authorized_keys file on the remote host.



Q: How can I transfer files using PuTTY?


A: You can transfer files using PuTTY by using PSCP or PSFTP, command-line SCP and SFTP clients that come with PuTTY. To use PSCP or PSFTP, you need to open a Command Prompt window and enter the appropriate commands. For example, to copy a file from your local system to a remote host using PSCP, you can use this command:


  • - pscp [options] source destination - where source is the path of the file on your local system, and destination is the username@host:path of the file on the remote host. - For example: pscp C:\Users\Alice\Documents\report.docx alice@example.com:/home/alice/report.docx - To copy a file from a remote host to your local system using PSCP, you can use this command: - pscp [options] source destination - where source is the username@host:path of the file on the remote host, and destination is the path of the file on your local system. - For example: pscp alice@example.com:/home/alice/report.docx C:\Users\Alice\Downloads\report.docx - To use PSFTP, you need to first establish an SFTP connection to the remote host by entering this command: - psftp [options] [user@]host - where user is your username on the remote host, and host is its host name or IP address. - For example: psftp alice@example.com - Then, you can use commands such as cd, ls, get, put, mget, mput, etc. to navigate directories and transfer files.



Q: How can I change the appearance of PuTTY?


  • A: You can change the appearance of PuTTY by using the options under the Window and Colours categories in the PuTTY Configuration window. You can adjust the size and position of the window, the font type and size of the text, the cursor shape and blinking mode, the scrollback lines, and the colours of the text and background.



Q: How can I troubleshoot PuTTY errors?


A: Some of the common PuTTY errors are:


- Network error: Connection refused: This means This means that the remote host is not accepting connections on the port you specified. This could be due to several reasons, such as:


- The remote host is not running an SSH server or it is configured to use a different port. - The remote host is behind a firewall that blocks the port you specified. - The remote host is down or unreachable due to network issues. - To fix this error, you need to check the following:


- Make sure that the remote host is running an SSH server and that it is listening on the port you specified. You can use a tool such as nmap to scan the remote host for open ports. - Make sure that the remote host is not behind a firewall that blocks the port you specified. You may need to contact the network administrator or the host provider to allow the port through the firewall. - Make sure that the remote host is up and reachable by pinging it or using another network tool such as traceroute. - Network error: Connection timed out: This means that PuTTY did not receive a response from the remote host within a certain time limit. This could be due to several reasons, such as:


- The remote host is too busy or overloaded to respond. - The network connection between your system and the remote host is slow or unstable. - The network connection between your system and the remote host is interrupted by a router, proxy, or firewall. - To fix this error, you need to check the following:


- Make sure that the remote host is not too busy or overloaded to respond. You can try connecting at a different time or using a different protocol. - Make sure that the network connection between your system and the remote host is fast and stable. You can try using a different network or changing your network settings. - Make sure that the network connection between your system and the remote host is not interrupted by a router, proxy, or firewall. You may need to adjust your router, proxy, or firewall settings to allow PuTTY traffic through. - PuTTY Fatal Error: Server unexpectedly closed network connection: This means that PuTTY received a disconnection message from the server unexpectedly. This could be due to several reasons, such as:


- The server has a bug or a configuration error that causes it to close the connection abruptly. - The server has detected an unauthorized or malicious activity from your system and has terminated the connection for security reasons. - The server has reached its maximum number of connections or users and has rejected your connection request. - To fix this error, you need to check the following:


  • - Make sure that the server does not have a bug or a configuration error that causes it to close the connection abruptly. You may need to contact the server administrator or update the server software. - Make sure that your system does not have any unauthorized or malicious activity that triggers the server's security measures. You may need to scan your system for viruses, malware, or spyware, and avoid using any suspicious programs or scripts. - Make sure that the server does not have a limit on the number of connections or users and that it accepts your connection request. You may need to contact the server administrator or wait for some connections or users to disconnect.



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