[lwip-users] Cannot ping, STM32CubeMX, Keil, PPPoS

[sarp]

I use PPPoS of LWIP and successfully assigned static IP for the GSM module. 
I have activated ICMP in STM32CubeMX; however, I cannot ping the GSM module
and, examples use LWIP_PING_APP to initialize ping. 
Should I download and compile lwip/ping.h and ping.c?
I have seen that lwip firewall settings are to limit pings; therefore,
unless firewall is used, gsm module must be pinged freely..
Any help is appreciated..



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