The document contains firewall configuration settings that mark packets for various protocols like HTTP, DNS, POP3, SMTP, Winbox and P2P with different packet marks as they pass through the prerouting and postrouting chains. Specific ports are marked for protocols like HTTP (port 80), DNS (ports 53 and 53/UDP), POP3 (port 110), SMTP (port 25) and Winbox (port 8291). All P2P traffic is also marked.