TCP port 0 is reserved.
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http://www.isi.edu/in-notes/iana/assignments/port-numbers
Chuck
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Nurarif W
Sent: Thursday, January 18, 2001 11:41 PM
To: [EMAIL PROTECTED]
Subject: TCP port number 0
Hi,
Does anyone know what is the purpose of tcp port number 0 ?
I have an experience catching traffic coming from HTTP server with tcp =
port number 0 and destinated to any IP address with tcp port number 0. =
After I put an incoming acces-list that blocked port number 0, a few =
minute later I saw this packet was never being generated again. The =
access-list is applied for incoming traffic.
For example :
access-list 101 deny tcp host HTTPserver eq 0 any log
access-list 101 deny tcp any any eq 0 log
access-list 101 deny tcp any eq 0 any log
access-list 101 permit ip any any
Thank you
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