Sniffer socket

Question

Hi everyone ! Here is my problem... I don't manage to run this source correctly : http://www.c-sharpcorner.com/Network/SimpleSnifferInCSLM.asp Actually I manage to run it, but when I click on the Start button, a messagebox appears : "The specified parameter is unvalid (wrong range). Name of the param : newAdress". This exception coms from : ReceiveAll.CreateAndBindSocket(ip); I don't understand why it doesn't work :( I tried with my LAN ip and my ppp ip but there is always a problem. Is there anyone who may know where it comes from ? I'd like to make it work so much cause there isn't any sniffer I like on the web. Thanks Nico