serial data over ethernet on a linux box

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http://unix.stackexchange.com – I'm trying to connect a widget ( through Ethernet (serial to Ethernet) to a Linux box. Under Windows using a virtual device driver mapping I can see the serial data, so I know the widget serial to Ethernet is working. Now when I point to a Linux box all I am getting is a connection attempt when I use tcpdump: 21:00:07.322019 IP > development.local.8234: Flags [R], seq 4096, win 0, length 0 So the Ethernet packets are getting through but I can't find a way to map the serial data (over port 8234 Ethernet) to a device. Many variations of socat do (HowTos)