Which port is used by ICMP?

There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply

permit icmp any any echo Or the same using the icmp code permit icmp any any 0

permit icmp any any 8