Aide Aux Ports ouvert D'un Firewall??

J'ai analyser avec plusieurs test de firewall, mon firewall des Zone alarm le normal, mais certaint prot sont ouvert, mais comment les cacher?:

-"ICMP Ping Ping. Ping is a network troubleshooting utility. It asks your computer to acknowledge its existence. If your computer responds positively to a ping, hackers are more likely to target your computer. " Port Ouvert

-"113 Ident / Authentication. This service is required by some mail, news, or relay chat servers to allow access. A stealth result on this port could cause performance problems. "
Port fermé mais pas cacher

Merci pour votre aide