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Re: TWO WEEK LAST CALL: Regularizing Port Numbers for SSL

From: Robert Goodwin <robert.goodwin@mcc.ac.uk>
Date: Thu, 6 Feb 1997 10:58:29 +0000 (GMT)
Message-Id: <9744.9702061058@mcchpd.mcc.ac.uk>
To: ietf-tls@w3.org
Eric Murray wrote:
> The biggest drawback to seperate assigned ports for the TLS versions
> of N services is the limited port number space below 1024.
> Is there any reason (other than convention) for using port
> numbers under 1024?  I know some filtering router "firewalls"
> will need to be re-programmed, but other than that small problem
> why not use ports over 1024?

Ports below 1024 are treated differently under unix-like systems: only
root can initiate services on these ports[1], thus the operating system
provides for some protection against a user on the system trying to subvert
services - important particularly in the context of "secure" services.


[1]gross oversimplification, but adequate in the circumstances I think :-)
Received on Thursday, 6 February 1997 06:00:42 UTC

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