Echo and Echo-Reply Port Numbers?

and ICMP doesn't have any port numbers. It only has status codes.

Well, why don't you simply look into RFC 792 or at Wikipedia, Google it up or RTFM?

play around with ping or traceroute and capture the packets, then you'll see the different answer types.

...here a detailed description:

M

That's no real surprise, since ICMP doesn't have ports.

You believe wrong. ICMP is an IP protocol of its own that has nothing to do with TCP or UDP.

cu

59cobalt

As others have posted - ICMP does not have ports. See RFC792 (or RFC0792) at any search engine. ICMP Echo Request is a Type 8 Code 0, and the reply will be a Type 0 Code 0.

0792 Internet Control Message Protocol. J. Postel. September 1981. (Format: TXT=30404 bytes) (Obsoletes RFC0777) (Updated by RFC0950, RFC4884) (Also STD0005) (Status: STANDARD)

See also

echo 7/tcp Echo echo 7/udp Echo

Notice these are TCP and/or UDP, and not ICMP. This is a different service,

0862 Echo Protocol. J. Postel. May 1983. (Format: TXT=1237 bytes) (Also STD0020) (Status: STANDARD)

but when microsoft invented IP networking 13 years after everyone else, they didn't bother to implement this service - they have a habit of not bothering to follow existing standards. This isn't a big deal, as this service isn't required by RFC1122 (while the ICMP version _is_ required).

1122 Requirements for Internet Hosts - Communication Layers. R. Braden, Ed.. October 1989. (Format: TXT=295992 bytes) (Updated by RFC1349, RFC4379) (Also STD0003) (Status: STANDARD)

As only a few operating systems include the TCP and UDP Echo service, you will rarely see packets for port 7 - mainly from skript kiddiez who haven't learned how to read yet.

Old guy

Oh, but they did. However, it's only available with the server versions, and it's not installed by default (you need to install the Simple TCP/IP services).

cu

59cobalt