Re: TCP_DENIED when port !=80 and <= 1024

From: Henrik Nordstrom <hno@dont-contact.us>
Date: Thu, 13 May 1999 00:58:43 +0200

Knut A. Syed wrote:

> Port 81 was actually just one example. Todays log contains at least
> these ports: 81, 82, 90, 180, 1010, 1024.
>
> In what way would it be unsafe to accept all ports?

Because in the past hackers have abused HTTP proxies to hide their
identity when contacting all kinds of TCP/IP services (telnet, SMTP, IRC
and a lot of other non-HTTP services)

Besides, most HTTP servers on non-common ports >1024 are rouge servers
anyway, usually carrying questionable material.

--
Henrik Nordstrom
Received on Wed May 12 1999 - 16:56:56 MDT

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