I'm setting up some Global Rules in Comodo Firewall for ICMP traffic, and I'd like some advice. I noticed Outgoing ICMP from my PC to my router, type 8, code 0 which I've gathered to be Echo Requests. If I block them eventually I lose my internet connection, so I'm inclined to allow them. Should I make the rule only to allow it from my PC to my gateway (router)? What are some other ICMP traffic I could/should allow safely? When I set the FW up to stealth my ports to everyone it made rules for Fragmentation Needed and Time Exceeded, though I don't recall if it allowed it in or out (I removed them). I'd be greatly obliged if somebody could recommend some ICMP rules for me, to allow useful traffic and block the rest. Info. on my setup: Single PC, XP Pro SP3, NetBios disabled over TCP/IP, Comodo Firewall/D+ (proactive), Avira Personal, Firefox 3.6.17. I use the internet just for basic use (browsing).