[ale] OT: What port does Ping (ICMP Echo) Use?

[griffisb at bellsouth.net]

> 
> From: "Jerald Sheets" <jsheets at yahoo.com>
> Date: 2004/05/13 Thu PM 02:16:47 EDT
> To: "'Atlanta Linux Enthusiasts'" <ale at ale.org>
> Subject: RE: [ale] OT: What port does Ping (ICMP Echo) Use?
> 
> RFC 792 is a "must read" for you.
> 
> http://www.faqs.org/rfcs/rfc792.html
> 
> Ping is in it's own world.  While it uses the TCP/IP stack, it has its
> own specil function called "echo".  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 "ICMP echo", 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 [mailto:ale-bounces 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?
> 

Thanks! I'll take a look at the RFC.