Reply To: Send out modified ip packets, but no reponse ( NAT ) September 10, 2004 at 2:07 pm #5628 hoowaycnParticipant It’s XP. For the PPP, I use RasPPPoE. Enable IP routing? Do you mean set HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters IPEnableRouter to 1. Oh, I did it. And test again, still no response!! Do you need to see the whole code?