The well-known SSH/Telnet program PuTTY 0.75 has been released with security fixes, certificates, and protocol upgrades. PuTTY is a free and open source program that integrates a virtual terminal, system console, and network file transfer. It supports multiple network protocols, including SCP, SSH, Telnet, Rlogin, and raw socket connections, and it can also connect to serial ports. The software name “PuTTY” has no meaning.

Introduction to the

The PuTTY’s official website: www.chiark.greenend.org.uk/~sgtatham/p… In June 2007, the highest stable release was 0.6.

PuTTY is a cross-platform remote login tool that includes a set of programs, including:

  • PuTTY (Telnet and SSH client)
  • PSCP (SCP client, which is similar to the SCP command in Unix/Linux.)
  • PSFTP (SFTP command line client, similar to FTP file transfer, but using SSH port 22 instead of FTP port 21, similar to Unix/Linux SFTP command)
  • PuTTYtel (just a Telnet client)
  • Plink (command line tool that executes commands on remote servers)
  • Pageant (SSH authentication agent that uses PuTTY, PSCP, or Plink to authenticate users without having to enter a password every time
  • PuTTYgen (tool used to generate RSA and DSA keys).

Although it contains so much, I often see only using PuTTY to log in to the server, which does not give full play to the powerful functions of PuTTY. PuTTY is also used as a component in many software, such as FileZilla and WinSCP. Unless otherwise specified, the default login protocol is SSH. After all, using PuTTY is mainly for logging in to the SSH host. Telnet and RLogin do not provide the powerful functions of PuTTY.

Version 0.76

These features are new in 0.76 (released 2021-07-17):

  • New option to abandon an SSH connection if the server allows you to authenticate in a trivial manner.
  • Bug fix: Windows PuTTY crashed when the ‘Use system colours’ option was used.
  • Bug fix: crash on Windows when using MIT Kerberos together with ‘Restart Session’.
  • Bug fix: Windows PuTTY leaked named pipes after contacting Pageant.
  • Bug fix: Windows PuTTY didn’t update the window while you held down the scrolbar arrow buttons long enough to ‘key-repeat.
  • Bug fix: user colour-palette reconfiguration via ‘Change Settings’ were delayed-action.
  • Bug fix: server colour-palette reconfigurations were sometimes lost.
  • Bug fix: a tight loop could occur on reading a truncated private key file.
  • Bug fix: the Windows Pageant GUl key list didn’t display key lengths.

Here are nine new features in version 0.76 (released at 2021-07-17) :

  1. Discard the new option for SSH connections if the server allows you to authenticate in a simple manner.
  2. Bug fix: Windows PuTTY crashes when using the use system color option.
  3. Bug fix: Windows crashes when using MIT Kerberos and “restart session”.
  4. Bug fix: Windows PuTTY leaks named pipes after contacting Pageant.
  5. Bug fix: Windows PuTTY does not update Windows when you hold down the scrollbar arrow key long enough to “repeat the key”.
  6. Bug fix: User palette reconfiguration was delayed by “change Settings”.
  7. Bug fix: Server palette reconfiguration is sometimes lost.
  8. Bug fix: tight loops may occur while reading truncated private key files.
  9. Bug fix: Windows Pageant GUl button list does not show button length.