IP Forwarding

[RPC]

Hello, I have a question about LWIP functionality.

I'd like to know if it's possible to redirect a tcp request received on the pppos interface, to a device that is connected onto the ethernet interface and listening on the desired port.
Thanks in advance!

[STea · Accepted solution]

Hello @RPC ,

I assume that would be possible as mentioned in LwIP documentation and this can be done by setting 

#define IP_FORWARD   1

(add this to lwipopts.h)

IP_FORWARD==1: Enables the ability to forward IP packets across network interfaces. If you are going to run lwIP on a device with only one network interface, define this to 0. refer to lwIP: IPv4.
Regards

[Andrew Neil]

https://www.nongnu.org/lwip/2_0_x/group__lwip__opts__ipv4.html#ga881d32ff5ee02af01f758953f1b51d59