PSSH VS OpenSSH

• Parallel Execution
  PSSH allows you to execute SSH commands in parallel, significantly reducing the time taken to run commands on multiple servers compared to executing them sequentially.
• Efficiency
  By parallelizing SSH operations, PSSH can make efficient use of system resources, especially when managing a large number of servers.
• Ease of Use
  PSSH provides a simple command-line interface that is easy to learn and use for users familiar with SSH, reducing the learning curve for new users.
• Scalability
  It is suitable for managing a large number of servers, as it can handle concurrent SSH connections effectively.
• Open Source
  Being an open-source tool, users can modify and improve the codebase as needed and also benefit from community contributions.

Possible disadvantages

• Limited Features
  PSSH is primarily focused on executing commands in parallel and may lack some advanced features found in more comprehensive SSH management tools.
• Maintenance
  The project is archived on Google Code Archive, which may indicate a lack of ongoing maintenance and updates, potentially leading to compatibility issues with future SSH protocols or security vulnerabilities.
• Error Handling
  Error handling in PSSH might not be as robust or informative as needed for complex use cases, potentially requiring additional debugging and scripting efforts.
• Dependency on Python
  PSSH is a Python-based tool, which means that users will need to have a compatible Python environment installed and may face issues with differing Python versions or dependencies.

• Security
  OpenSSH provides secure encrypted communications between two untrusted hosts over an insecure network, offering strong encryption standards and authentication mechanisms.
• Open Source
  As an open-source project, OpenSSH is free to use and benefits from contributions and transparency from a wide community of developers and users.
• Portability
  OpenSSH is highly portable and available across many operating systems, including Linux, macOS, and Windows, making it a versatile tool for different environments.
• Rich Feature Set
  In addition to basic SSH functionality, OpenSSH includes features like secure file transfer (SFTP and SCP), tunneling, forwarding, and key management.
• Strong Community Support
  OpenSSH benefits from extensive community and developer support, ensuring regular updates, patches, and a wealth of documentation and user discussions.

Possible disadvantages

• Complexity
  Configuring and managing OpenSSH can be complex, especially for beginners, and requires a good understanding of security principles and SSH protocols.
• Performance Overhead
  Encryption and decryption processes can introduce performance overhead, which can be a concern in environments with high traffic or limited resources.
• Dependency on Proper Configuration
  The security of OpenSSH heavily depends on proper configuration; misconfigurations can lead to vulnerabilities, defeating the purpose of using a secure protocol.
• Limited GUI Tools
  OpenSSH primarily operates via command-line interface (CLI), which may not be as user-friendly as graphical user interface (GUI) tools for some users.
• Compatibility Issues
  While OpenSSH is highly portable, there can be compatibility issues with certain legacy systems or non-standard SSH implementations.

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Ubuntu Server 18.04 Administration Guide Part 02 - Securing OpenSSH

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• is ssh (OpenSSH) impacted by CVE-2022-3786 and CVE-2022-3602

  I haven't found a clear answer to this. After checking openssh.com I haven't found any mention. Source: almost 4 years ago