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RFC2217.md

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RFC 2217 server (TCP to COM port redirector)

You have a server computer with physical COM7 port and you'd like to share it through the network by the RFC 2217 (Telnet Com Port Control Option) protocol:

Start the com2tcp-rfc2217.bat on COM7 port (see hub4com's ReadMe.txt for more info). For example:

  • com2tcp-rfc2217.bat COM7 7000 for LAN mode without encryption

or set physical serial port to COM7

  • ngrok4com -7 for LAN mode without encryption
  • ngrok4com 7 for ngrok mode with encryption

It will listen TCP/IP port 7000 for incaming connections and redirect them to COM7 port.

or select physical serial port

  • ngrok4com -0 for LAN mode without encryption
  • ngrok4com for ngrok mode with encryption

It will listen TCP/IP port 7000 for incaming connections and redirect them to selected physical serial port.

or select physical serial port and set TCP/IP port to 8000

  • ngrok4com -0 8000 for LAN mode without encryption
  • ngrok4com 0 8000 for ngrok mode with encryption

It will listen TCP/IP port 8000 for incaming connections and redirect them to selected physical serial port.

RFC 2217 client (COM port to TCP redirector)

You have a server computer 192.168.1.1 with physical serial port shared through the network by the RFC 2217 protocol (see above example) and you'd like to use it on the client computer like a virtual serial port.

With the com0com's Setup Command Prompt create COM11<->CNCB0 virtual COM port pair (see com0com's ReadMe.txt for more info). For example:

  • setupc install 0 PortName=COM#,RealPortName=COM11,EmuBR=yes,AddRTTO=10,AddRITO=10 -

    Start the com2tcp-rfc2217.bat on CNCB0 port. For example:

  • com2tcp-rfc2217.bat \\.\CNCB0 192.168.1.1 7000 for LAN mode without encryption

or set TCP/IP host to 192.168.1.1

  • ngrok4com -192.168.1.1 for LAN mode without encryption
  • ngrok4com 192.168.1.1 for LAN mode with encryption

It will redirect virtual serial port COM11 on the second computer to the physical serial port on the first computer over TCP/IP port 7000.

or set TCP/IP host to 192.168.1.1 and TCP/IP port to 8000

  • ngrok4com -192.168.1.1 8000 for LAN mode without encryption
  • ngrok4com 192.168.1.1 8000 for LAN mode with encryption

It will redirect virtual serial port COM11 on the second computer to the physical serial port on the first computer over TCP/IP port 8000.

or use ngrok tunnel created on first computer

  • ngrok4com for ngrok mode with encryption

It will redirect virtual serial port COM11 on the second computer to the physical serial port on the first computer over ngrok tunnel.