TCPMUX
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The TCPMUX (TCP port service multiplexer) is a little-used internet protocol defined in RFC 1078. Its purpose is to multiplex more than one service through a single TCP port.
A host may connect to a server that supports the TCPMUX protocol, on TCP port 1. The host then sends a name of the service required, followed by carriage return and line feed characters (CRLF). The server replies with a '+' or '-' and an optional message, followed by CRLF. In case of a positive reply ('+') the protocol or service requested is started, otherwise the connection is closed.
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