I want to achieve difficult firewall on Rpi, which will filter trafic from 10 different machines->eth1->eth0->Internet.
But before using it in my project, a want to test how efficient(productive) this firewall is. So i need to create rules, which will filter all trafic, but i don't know how can i test, which ports/services/packets should i filter. Could i tell me some examples, which i can use e.g filter http packets.
I already have some simple rules, but can't think up more difficult rulles, filterin internet trafic.