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PuTTY
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<h2 id="features">Features</h2> <p>PuTTY supports many variations on the secure remote terminal, and provides user control over the <a href="/facts/Secure_Shell/wjVRw5zv">SSH</a> encryption key and protocol version, alternate ciphers such as <a href="/facts/Advanced_Encryption_Standard/HdXGBY2Q">AES</a>, <a href="/facts/Triple_DES/sgzSD50P">3DES</a>, <a href="/facts/RC4/HAR5kL0T">RC4</a>, <a href="/facts/Blowfish_(cipher)/H6fYatpd">Blowfish</a>, <a href="/facts/Data_Encryption_Standard/STfBjTGb">DES</a>, and <a href="/facts/Public-key/gowoFTxS">public-key</a> authentication. PuTTY uses its own format of key files – PPK (protected by <i>Message Authentication Code</i>).<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> PuTTY supports <a href="/facts/Single_sign-on/qqqLoB8h">SSO</a> through <a href="/facts/Generic_Security_Services_Application_Program_Interface/7rTyX3x5">GSSAPI</a>, including user provided GSSAPI <a href="/facts/Dynamic-link_library/vySyC1dz">DLLs</a>. It also can emulate control sequences from <a href="/facts/Xterm/XcS74d7I">xterm</a>, <a href="/facts/VT220/xcC6bDaQ">VT220</a>, <a href="/facts/VT102/5bQBqBb5">VT102</a> or <a href="/facts/ECMA-48/29l9Yalv">ECMA-48</a> <a href="/facts/Terminal_emulator/yNfevBJd">terminal emulation</a>, and allows local, remote, or dynamic <a href="/facts/Port_forwarding/s5rsSftr">port forwarding</a> with SSH (including <a href="/facts/X11/ac2vRIQL">X11</a> forwarding). The network communication layer supports <a href="/facts/IPv6/d4dg7kIL">IPv6</a>, and the SSH protocol supports the <a href="/facts/Zlib/rExIchaK">zlib</a>@openssh.com delayed compression scheme. It can also be used with local serial port connections. </p><p>PuTTY comes bundled with command-line <a href="/facts/Secure_copy_protocol/letk8brL">SCP</a> and <a href="/facts/SSH_File_Transfer_Protocol/88YptbER">SFTP</a> clients, called "pscp" and "psftp" respectively, and plink, a command-line connection tool, used for non-interactive sessions.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> </p><p>PuTTY does not support <a href="/facts/Tabbed_document_interface/YswKP5Mg">session tabs</a> directly,<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> but many wrappers are available that do.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p> <h2 id="history">History</h2> <p>PuTTY development began in 1996,<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> and was a usable SSH-2 client by October 2000.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a><a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a> </p> <h2 id="components">Components</h2> <p>PuTTY consists of several components: </p> PuTTY the <a href="/facts/Telnet/hxT0e85h">Telnet</a>, <a href="/facts/Rlogin/fB8rLwNJ">rlogin</a>, and <a href="/facts/Secure_Shell/wjVRw5zv">SSH</a> client itself, which can also connect to a <a href="/facts/Serial_port/VpcrH530">serial port</a> PSCP an <a href="/facts/Secure_copy_protocol/letk8brL">SCP</a> client, i.e. command-line secure file copy. Can also use <a href="/facts/SSH_File_Transfer_Protocol/88YptbER">SFTP</a> to perform transfers PSFTP an <a href="/facts/SSH_File_Transfer_Protocol/88YptbER">SFTP</a> client, i.e. general file transfer sessions much like <a href="/facts/File_Transfer_Protocol/THuWgzfw">FTP</a> PuTTYtel a Telnet-only client Plink a command-line interface to the PuTTY back ends. Usually used for <a href="/facts/Tunneling_protocol/jKaT1Czc">SSH Tunneling</a> Pageant an <a href="/facts/Ssh-agent/kC7savh6">SSH authentication agent</a> for PuTTY, PSCP and Plink PuTTYgen an <a href="/facts/RSA_(cryptosystem)/XTzyfHuq">RSA</a>, <a href="/facts/Digital_Signature_Algorithm/0o0FK486">DSA</a>, <a href="/facts/Elliptic_Curve_Digital_Signature_Algorithm/gl0mfnS1">ECDSA</a> and <a href="/facts/EdDSA/IbTRBhK3">EdDSA</a> key generation utility pterm (Unix version only) an X11 client which supports the same terminal emulation as PuTTY <h2 id="see-also">See also</h2> <ul> <li>Free and open-source software portal</li></ul> <ul><li><a href="/facts/Comparison_of_SSH_clients/tEjXUnp6">Comparison of SSH clients</a></li> <li><a href="/facts/Tera_Term/h5fWEmx9">Tera Term</a></li> <li><a href="/facts/Mintty/5eIRIXrD">mintty</a></li> <li><a href="/facts/WinSCP/7tagd8zu">WinSCP</a></li> <li><a href="/facts/Minicom/dIkqr8Rk">minicom</a></li></ul> <h2 id="external-links">External links</h2> Wikimedia Commons has media related to PuTTY. <ul><li><a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/">Official website</a> </li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"PuTTY FAQ". www.chiark.greenend.org.uk. <a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-pronounce" target="_blank">https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-pronounce</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"PuTTY FAQ". [PuTTY is] the name of a popular SSH and Telnet client. Any other meaning is in the eye of the beholder. It's been rumoured that 'PuTTY' is the antonym of 'getty', or that it's the stuff that makes your Windows useful, or that it's a kind of plutonium Teletype. We couldn't possibly comment on such allegations. <a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-meaning" target="_blank">https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-meaning</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"PuTTY for Symbian OS". s2putty.sourceforge.net. <a href="https://s2putty.sourceforge.net/" target="_blank">https://s2putty.sourceforge.net/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Forum Nokia Wiki – PuTTY for Symbian OS". Archived from the original on 16 July 2012. <a href="https://archive.today/20120716084848/http://wiki.forum.nokia.com/index.php/PuTTY_for_symbian_OS" target="_blank">https://archive.today/20120716084848/http://wiki.forum.nokia.com/index.php/PuTTY_for_symbian_OS</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"SSH and Transfer Files using Putty Private Key (.ppk)". D4Nyll. 21 June 2016. Archived from the original on 18 May 2021. <a href="https://web.archive.org/web/20210518105614/http://blog.danyll.com/ssh-and-transfer-files-using-putty-private-key-ppk/" target="_blank">https://web.archive.org/web/20210518105614/http://blog.danyll.com/ssh-and-transfer-files-using-putty-private-key-ppk/</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Barrett, Daniel; Silverman, Richard; Byrnes, Robert (2005). SSH, The Secure Shell: The Definitive Guide. O'Reilly Media. pp. 577–579. ISBN 9780596008956. <a href="9780596008956" target="_blank">9780596008956</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"PuTTY wish multiple-connections". www.chiark.greenend.org.uk. <a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/multiple-connections.html" target="_blank">https://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/multiple-connections.html</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>(e.g. SuperPuTTY, MTPuTTY, mRemoteNG, WinSSHTerm, PuTTY Manager, PuttyTabs or TWSC (Terminal Window ShortCuts)). <a href="https://github.com/jimradford/superputty" target="_blank">https://github.com/jimradford/superputty</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Tatham, Simon (12 March 2025). "Iconography of the PuTTY tools". <a href="https://www.chiark.greenend.org.uk/~sgtatham/quasiblog/putty-icons/" target="_blank">https://www.chiark.greenend.org.uk/~sgtatham/quasiblog/putty-icons/</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>"PuTTY FAQ". www.chiark.greenend.org.uk. <a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-ssh2" target="_blank">https://www.chiark.greenend.org.uk/~sgtatham/putty/faq.html#faq-ssh2</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>"PuTTY Change Log". www.chiark.greenend.org.uk. <a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html" target="_blank">https://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> </ol>