hi, i am wanting to make a portable IP scanner such as the program at http://www.advanced-ip-scanner.com/ but i want it to be on a arduino with an internet shield that saves the working computer ips to a SD card. i own arduino uno, seeedstudio ethernet shield, and seeedstudio SD card shield if that helps.
I think it's better to use WiFi shield or another WiFi module, and modify the firmware to use it as packet sniffer.
Best regards.
seeedstudio ethernet shield
Which version? That's why we usually ask for links to the used hardware.
Please define what exactly that scanner should do. In the link software you have to enter the IP network that should be scanned, how do you want to enter that network definition on the Arduino?. It also makes a huge difference if just pingable hosts should be recognized or if also hosts with an active firewall (and disabled ICMP) must be listed.