SSL/SSH Multiplexer accepts connections on specified ports, and forwards them further based on tests performed on the first data packet sent by the remote client. ((sslh Documentation))
sslh can be installed with the Pakfire web interface or via the console:
pakfire install sslh
There is no web interface for this Addon. To run this Addon open the client console or terminal and access the IPFire box via SSH.
FIXME - add more info about sslh and how to use. Maybe an example?