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IP Forwarding

RPC
Associate III

‎2025-01-21 08:07 AM

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!

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STea
ST Employee

‎2025-02-18 02:59 AM

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


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