[no subject]

<a  rel="nofollow" href="http://www.faqs.org/rfcs/rfc792.html";>http://www.faqs.org/rfcs/rfc792.html</a>

Ping is in it's own world.  While it uses the TCP/IP stack, it has its
own specil function called &quot;echo&quot;.  Echo doesn't function on a port, but
at an integrated low layer of the stack.  RFC 792 says it much better
than I ever could...have a looksee.

Also, Ethereal, and Network General's Sniffer as well as TCPDUMP, NA
Sniffer, etc.  All recognize a ping as &quot;ICMP echo&quot;, and this is how you
will see them in your trace.  You can even set filters to only show ICMP
echos on the segment you are sniffing.

Hope that helps.

--JMS

-----Original Message-----
From: ale-bounces at ale.org [<a  rel="nofollow" href="mailto:ale-bounces";>mailto:ale-bounces</a> at ale.org] On Behalf Of
griffisb at bellsouth.net
Sent: Thursday, May 13, 2004 10:34 AM
To: ale at ale.org
Subject: [ale] OT: What port does Ping (ICMP Echo) Use?


Okay, I should know this. Or, I should open up ethereal and set
port-forwarding on my switch, so please pardon my laziness. Anyone know
what port and protocol Ping uses? I looked it up and saw TCP port 7 and
UDP port 7, then saw something else regarding ICMP Echo. 

So, any of you capture a ping? What port and protocol does it use?

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