Firewall Wizards mailing list archives

Re: ICMP Well-Known Port


From: Mikael Olsson <mikael.olsson () enternet se>
Date: Wed, 29 Sep 1999 14:15:53 +0200



wpl1 () jps net wrote:

Evidently I'm really missing the boat.  I've been trying to find the
well-known port for ICMP.  Is there no such thing?


You're right; you are missing the boat.
Ports only apply to UDP and TCP.
ICMP does not run over UDP or TCP, it runs straight under
IP, which means that it has an IP protocol number.

ICMP is protocol number 1
TCP is protocol number 6
UDP is protocol number 17

-- 
Mikael Olsson, EnterNet Sweden AB, Box 393, S-891 28 ÖRNSKÖLDSVIK
Phone: +46-(0)660-105 50           Fax: +46-(0)660-122 50
WWW: http://www.enternet.se        E-mail: mikael.olsson () enternet se



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