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PuTTY user manual (copy from 2022) PuTTY (/ ˈ p ʌ t i /) [4] is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port. The name "PuTTY" has no official meaning. [5]
Standard connection protocols - X-Win32 offers six standard connection protocols: ssh, telnet, rexec, rlogin, rsh, and XDMCP Window modes - Like other X servers for Microsoft Windows, X-Win32 has two window modes, Single and Multiple.
The Inter-Client Exchange (ICE) Protocol implemented by the Inter-Client Exchange Library for direct communication between X11 clients uses the same MIT-MAGIC-COOKIE-1 authentication method, but has its own iceauth utility for accessing its own .ICEauthority file, the location of which can be overridden with the environment variable ICEAUTHORITY.
The client establishes the connection, sending the first packet. The server answers by sending back a packet stating the acceptance or refusal of the connection, or with a request for a further authentication. If the connection is accepted, the acceptance packet contains data for the client to use in the subsequent interaction with the server.
NAT passthrough: the ability to connect to the server behind a NAT without configuring the router's port forwarding rules. It offers an advantage when you can't reconfigure the router/firewall (for example in case it is on the Internet service provider's side), but is a serious security risk (unless the traffic is end-to-end encrypted), because ...
secure connection, remote access: ... (synchronization, copy, remote delete) capability using PuTTY as a back ... Example of tunneling an X11 application ...
The X Window System (X11, or simply X; stylized 𝕏) is a windowing system for bitmap displays, common on Unix-like operating systems. X originated as part of Project Athena at Massachusetts Institute of Technology (MIT) in 1984. [3] The X protocol has been at version 11 (hence "X11") since September 1987.
Xming may be used with implementations of Secure Shell (SSH) to securely forward X11 sessions from other computers. [7] It supports PuTTY and ssh.exe, and comes with a version of PuTTY's plink.exe. The Xming project also offers a portable version of PuTTY.