Firewall Wizards mailing list archives

port designation question


From: "Kertesz Imre" <kertesz_imre () bah com>
Date: Wed, 10 Feb 1999 11:06:09 -0500

Being green in the firewall world, I have a basic question involving the
process by which a workstation designates ports for an application's
use.

Applications that use reserved ports, such as e-mail and telnet clients,
will not have a problem traversing a firewall. The request and
corresponding reply will use a pre-determined port that the firewall
will allow.

However, applications that do not use reserved ports are assigned a port
from an available pool of ports. The request traverses the firewall but
the response will be blocked (provided the firewall is tight).

Is there a way to force the application to use a particular outbound
port so that the firewall can be configured to open only that port?

thanks - I
__________________________________________
"Failure is not an option. It comes bundled 
with your Microsoft product."
-- Ferenc Mantfeld

Imre Kertész
BAH 410.684.6564



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