sslh
A protocol multiplexer that shares SSH, HTTPS, and other services on a single port by inspecting the first data packet.
What is sslh?
sslh is a protocol multiplexer (or switchboard) that allows multiple network services to share a single port by inspecting the initial client packet. It solves the problem of accessing restricted services like SSH behind firewalls that only allow common ports such as 443, enabling secure remote access without requiring port forwarding or complex network changes.
System administrators, network engineers, and DevOps professionals who need to run multiple services on limited ports, especially in restricted corporate or firewall-heavy environments.
Developers choose sslh for its reliable protocol detection, transparent proxying capabilities, and mature feature set—including support for modern TLS extensions (SNI/ALPN), IPv6, and containerized deployments—making it a robust solution for production use.
Overview
Applicative Protocol Multiplexer (e.g. share SSH and HTTPS on the same port)
Use Cases
Best For
- Running SSH and HTTPS simultaneously on port 443 to bypass corporate firewall restrictions
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