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Tool and Usage

Project details
Programming languageC
AuthorYves Rutschle
Latest release1.21 []

Project health

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Why this tool?

A typical use case for multiplexing is to allow serving several services on one port. Port 443 is commonly used, as that is typically opened on firewalls to allow HTTPS traffic. By multiplexing it, you can also use SSH or other services on the same port.

Usage and audience

sslh is commonly used for bypassing firewall rules or protocol multiplexing. Target users for this tool are general public and system administrators.

Author and Maintainers

Sslh is under development by Yves Rutschle.


Supported operating systems

Sslh is known to work on FreeBSD and Linux.

sslh alternatives

Similar tools to sslh:



The sshttp tool helps with protocol multiplexing. This way multiple protocols, like HTTP and SSH, can be used on a single TCP port. This can be useful to bypass strict firewall rules.



Cowrie is a honeypot to emulate SSH and telnet services. It can be used to learn attack methods and as an additional layer for security monitoring.



Dockpot uses Docker containers and HonSSH to create on-demand SSH honeypots. It forwards traffic for analysis and learning about attack patterns.

All sslh alternatives

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Related tool information


This tool is categorized as a protocol multiplexer.

Related terms