PuTTY User Manual - Documentation & Help

PuTTY User Manual

PuTTY is a free (MIT-licensed) Windows Telnet and SSH client. This manual documents PuTTY, and its companion utilities PSCP, PSFTP, Plink, Pageant and PuTTYgen.

Note to Unix users: this manual currently primarily documents the Windows versions of the PuTTY utilities. Some options are therefore mentioned that are absent from the Unix version; the Unix version has features not described here; and the pterm and command-line puttygen utilities are not described at all. The only Unix-specific documentation that currently exists is the man pages.

This manual is copyright 1997-2017 Simon Tatham. All rights reserved. You may distribute this documentation under the MIT licence. See appendix C for the licence text in full.

Chapter 1: Introduction to PuTTY 1.1 What are SSH, Telnet and Rlogin? 1.2 How do SSH, Telnet and Rlogin differ?

Chapter 2: Getting started with PuTTY 2.1 Starting a session 2.2 Verifying the host key (SSH only) 2.3 Logging in 2.4 After logging in 2.5 Logging out

Chapter 3: Using PuTTY 3.1 During your session 3.2 Creating a log file of your session 3.3 Altering your character set configuration 3.4 Using X11 forwarding in SSH 3.5 Using port forwarding in SSH 3.6 Making raw TCP connections 3.7 Connecting to a local serial line 3.8 The PuTTY command line

Chapter 4: Configuring PuTTY 4.1 The Session panel 4.2 The Logging panel

4.3 The Terminal panel 4.4 The Keyboard panel 4.5 The Bell panel 4.6 The Features panel 4.7 The Window panel 4.8 The Appearance panel 4.9 The Behaviour panel 4.10 The Translation panel 4.11 The Selection panel 4.12 The Colours panel 4.13 The Connection panel 4.14 The Data panel 4.15 The Proxy panel 4.16 The Telnet panel 4.17 The Rlogin panel 4.18 The SSH panel 4.19 The Kex panel 4.20 The Host Keys panel 4.21 The Cipher panel 4.22 The Auth panel 4.23 The GSSAPI panel 4.24 The TTY panel 4.25 The X11 panel 4.26 The Tunnels panel 4.27 The Bugs and More Bugs panels 4.28 The Serial panel 4.29 Storing configuration in a file Chapter 5: Using PSCP to transfer files securely 5.1 Starting PSCP 5.2 PSCP Usage Chapter 6: Using PSFTP to transfer files securely 6.1 Starting PSFTP 6.2 Running PSFTP 6.3 Using public key authentication with PSFTP Chapter 7: Using the command-line connection tool Plink 7.1 Starting Plink 7.2 Using Plink 7.3 Using Plink in batch files and scripts 7.4 Using Plink with CVS

7.5 Using Plink with WinCVS Chapter 8: Using public keys for SSH authentication

8.1 Public key authentication - an introduction 8.2 Using PuTTYgen, the PuTTY key generator 8.3 Getting ready for public key authentication Chapter 9: Using Pageant for authentication 9.1 Getting started with Pageant 9.2 The Pageant main window 9.3 The Pageant command line 9.4 Using agent forwarding 9.5 Security considerations Chapter 10: Common error messages 10.1 `The server's host key is not cached in the registry' 10.2 `WARNING - POTENTIAL SECURITY BREACH!' 10.3 `SSH protocol version 2 required by our configuration but server only provides (old, insecure) SSH-1' 10.4 `The first cipher supported by the server is ... below the configured warning threshold' 10.5 `Server sent disconnect message type 2 (protocol error): "Too many authentication failures for root"' 10.6 `Out of memory' 10.7 `Internal error', `Internal fault', `Assertion failed' 10.8 `Unable to use this private key file', `Couldn't load private key', `Key is of wrong type' 10.9 `Server refused our public key' or `Key refused' 10.10 `Access denied', `Authentication refused' 10.11 `No supported authentication methods available' 10.12 `Incorrect CRC received on packet' or `Incorrect MAC received on packet' 10.13 `Incoming packet was garbled on decryption' 10.14 `PuTTY X11 proxy: various errors' 10.15 `Network error: Software caused connection abort' 10.16 `Network error: Connection reset by peer' 10.17 `Network error: Connection refused' 10.18 `Network error: Connection timed out' 10.19 `Network error: Cannot assign requested address' Appendix A: PuTTY FAQ A.1 Introduction A.2 Features supported in PuTTY

A.3 Ports to other operating systems A.4 Embedding PuTTY in other programs A.5 Details of PuTTY's operation A.6 HOWTO questions A.7 Troubleshooting A.8 Security questions A.9 Administrative questions A.10 Miscellaneous questions Appendix B: Feedback and bug reporting B.1 General guidelines B.2 Reporting bugs B.3 Reporting security vulnerabilities B.4 Requesting extra features B.5 Requesting features that have already been requested B.6 Support requests B.7 Web server administration B.8 Asking permission for things B.9 Mirroring the PuTTY web site B.10 Praise and compliments B.11 E-mail address Appendix C: PuTTY Licence Appendix D: PuTTY hacking guide D.1 Cross-OS portability D.2 Multiple backends treated equally D.3 Multiple sessions per process on some platforms D.4 C, not C++ D.5 Security-conscious coding D.6 Independence of specific compiler D.7 Small code size D.8 Single-threaded code D.9 Keystrokes sent to the server wherever possible D.10 640?480 friendliness in configuration panels D.11 Automatically generated Makefiles D.12 Coroutines in ssh.c D.13 Single compilation of each source file D.14 Do as we say, not as we do Appendix E: PuTTY download keys and signatures E.1 Public keys E.2 Security details

E.3 Key rollover Appendix F: SSH-2 names specified for PuTTY

F.1 Connection protocol channel request names F.2 Key exchange method names F.3 Encryption algorithm names

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