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Mac OS X 10.5 Leopard: About the Application Firewall

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Old 11-21-2008
Mac OS X 10.5 Leopard: About the Application Firewall
Mac OS X 10.5 Leopard includes a new technology called the Application Firewall. One of the basic purposes of a firewall is to control connections made to your computer from other computers on the network. In most firewall software, you must know the network ports and protocols an application uses to communicate, in order to control that application's network connections. Note: This article applies to the version of the Application Firewall included with Mac OS X 10.5.1 and later. Update to Mac OS X 10.5.1 or later if you have not yet done so. The Firewall in Leopard is an Application Firewall. This type of firewall allows you to control connections on a per-application basis, rather than a per-port basis. This makes it easier for less experienced users to gain the benefits of firewall protection and helps prevent undesirable applications from taking control of network ports that have been opened for legitimate applications. The Firewall applies to the Internet protocols most commonly used by applications, TCP and UDP. It does not affect AppleTalk. The Firewall may be set to block incoming ICMP "pings" by enabling Stealth Mode in the Advanced settings. Earlier ipfw technology is still accessible from the command line (in Terminal) and the Application Firewall does not overrule rules set with ipfw; if ipfw blocks an incoming packet, the Application Firewall will not process it. This article applies to the version of the Application Firewall included with Mac OS X 10.5.1 and later.

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LEARN ABOUT DEBIAN

lire::firewall

Firewall(3pm)						  LogReport's Lire Documentation					     Firewall(3pm)

NAME

       Lire::Firewall - supplies a subroutine enabling TCP and UDP portnumber-to-name mapping

SYNOPSIS

	use Lire::Firewall qw/:firewall_number2names /;

DESCRIPTION

       The Lire::Firewall::firewall_number2names converts numbers for network services, as commonly found in firewall log files, to their
       descriptive names.

       firewall_revolve FIXME TODO

       It takes a firewall Lire dlf object as argument, and operates on its to_port, from_port and protocol properties.

       TCP services, UDP services and ICMP types are supported.

SEE ALSO

       RPC 792 for ICMP types.

VERSION

       $Id: Firewall.pm,v 1.5 2006/07/23 13:16:27 vanbaal Exp $

COPYRIGHT

       Copyright (C) 2000, 2001, 2002 Stichting LogReport Foundation LogReport@LogReport.org

       This file is part of Lire.

       Lire is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with
       http://www.gnu.org/copyleft/gpl.html.

AUTHOR

       Francis J. Lacoste <flacoste@logreport.org>.  The first Lire implementation of a TCP and UDP portnumber-to-name mapping was written by
       Plamen Bozukov.

Lire 2.1.1							    2006-07-23							     Firewall(3pm)