A direct network connection to a serial port can be established using the "high TCP ports" convention. Each serial port access network service (e.g. SSH, Telnet) has a corresponding network Base Port.
When configured, direct access to a specific serial port is served on the Base Port + the Serial Port #. For example, the base port of SSH is 3000 so to SSH directly to serial port 4 you would SSH to TCP port 3004.
The default base ports used for direct access to serial ports are:
|Service||TCP Base Port|
In addition to the default base ports, alternative base ports may be configured using the System -> Services -> Alternate ... Base fields.
Network services can be enabled for per-serial port using the service checkboxes under Serial & Network -> Serial Ports -> Edit -> Console Server Settings.
Access through the firewall may be configured per-interface and per-service using the System -> Services -> Service Access -> ... to serial ports rows.