Firewall Wizards mailing list archives
Re: ECHO Protocol
From: Tim Donahue <tdonahue () vonsystems com>
Date: Wed, 02 Jul 2008 10:08:49 -0400
Quoting peng liu <cleverpigboy () gmail com>:
OK. This is the tricky part since ICMP is built basd on IP protocol and it works on thesame layer as TCP/UDP. Then why my local services file contains: echo 7/tcp echo 7/udp
This is the echo daemon, see http://www.faqs.org/rfcs/rfc862.html for details.
So the echo here is different than the Echo, Echo-reply protocol we are talking here?
The ping command uses ICMP in Windows. Yes, I know that there are alternate "ping" programs that will allow you to use TCP, UDP or possibly anything that programmer could think of, but the traditional ping uses ICMP. Two of the ICMP types are referred to as echo and echo reply, which are the ICMP types used for ping. See the ICMP RFC (http://www.faqs.org/rfcs/rfc792.html) for more detailed information.
On 6/30/08, Keith A. Glass <salgak () speakeasy net> wrote:Echo is a specific member of the ICMP family of protocols. But not the ONLY member. . . Ping is typically Echo and Echo-reply. Hope that clears it up Keith Security Geek * Curmudgeon at Large * Short on Sleep On Thu Jun 26 6:00 , "peng liu" sent: >All, > >I am checking the ICMP protocol these days and some documents say that Ping command in Windows uses ICMP protocol, while others say that Ping uses ECHO protocol, which is through TCP port 7. > >So my question is which protocol is actually used by PING command in Windows? > >Pengy
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Current thread:
- Re: ECHO Protocol peng liu (Jul 02)
- Re: ECHO Protocol Tim Donahue (Jul 09)
- <Possible follow-ups>
- Re: ECHO Protocol Haim [Howard] Roman (Jul 02)
- Re: ECHO Protocol Secure Scorp (Jul 02)
- FW: ECHO Protocol David Hurst (Jul 09)