socat: tunnel IP through TTY

Question

Is it possible to get an bidirectional IP-tunnel over ttyS0-like serial (modem) devices with the socat utility? I tried to use TUN option but still can\'t g

Answer 1

based on what I have tried, you don't need socat to establish a tunnel. you can just do the following:

PC1:
 1, sudo slattach -s 19200 -p slip -dL /dev/ttyUSB0
 2, sudo ifconfig sl0 10.0.0.1/24 up
 3, sudo route add default gw 10.0.0.254 sl0

PC2:
 1, sudo slattach -s 19200 -p slip -dL /dev/ttyUSB0
 2, sudo ifconfig sl0 10.0.0.2/24 up
 3, sudo route add default gw 10.0.0.254 sl0

After the setup, I can ping PC2 from PC1, and vice versa.

There is another pre-condition: your Linux kernel must have slip module loaded.