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Date:      Tue, 16 Jan 2007 10:11:46 -0800
From:      Chuck Swiger <cswiger@mac.com>
To:        Randall Stewart <rrs@cisco.com>
Cc:        freebsd-net <freebsd-net@freebsd.org>
Subject:   Re: Problem with port 0
Message-ID:  <E7D65849-3A24-4A84-B1B4-D888BDB6E18E@mac.com>
In-Reply-To: <45ACCFF4.4040709@cisco.com>
References:  <f9876c510701120903r65543ef4nafc7eeead2becb42@mail.gmail.com> <20070112163057.2a3ec8f0.rnsanchez@wait4.org> <45A807F8.7080603@FreeBSD.org> <45ACCFF4.4040709@cisco.com>

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On Jan 16, 2007, at 5:15 AM, Randall Stewart wrote:
> So... I guess this really leads to a question..
>
> What does "reserved" mean by IANA.

"reserved" means one "SHOULD NOT" use that port, where the phrase in  
caps is defined in RFC-2119 (http://www.ietf.org/rfc/rfc2119.txt).  And:

   http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

...states: "0/tcp,udp: Reserved; do not use (but is a permissible  
source port value if the sending process does not expect messages in  
response)"

-- 
-Chuck




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