I've got a server going online tomorrow, to handle email, http, ssh & ftp for the domain it'll host. It's not clear to me what ICMP packets I (1) must allow, (2) which are optional but recommended, and (3) which I should not allow.
I'd be most appreciative if someone could educate me (or tell me which
fine manual to read), regarding ICMP. Thanks in advance.
-ste
