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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

arno-iptables-firewall

ARNO-IPTABLES-FIREWALL(8)												 ARNO-IPTABLES-FIREWALL(8)

NAME

       arno-iptables-firewall - Single- & multi-homed firewall script with DSL/ADSL support.

SYNOPSIS

       /etc/init.d/arno-iptables-firewall [start|stop|status|force-reload|restart]

DESCRIPTION

       arno-iptables-firewall  is  an  iptables configuration script with support for both IPv4 & IPv6.  While it is extremely easy to use one can
       nevertheless use it in quite complicated environments.

       All available options are explained in the extensively documented configuration file.

       The external interface of the system needs to be set up properly in the firewalls configuration file (EXT_IF).  The default behavior of the
       firewall is to deny all incoming connections.

       For  additional	requirements not covered by the configuration file custom iptables rules can be placed in /etc/arno-iptables-firewall/cus-
       tom-rules.  This file is automatically parsed by the service script.

       See the README file (eg. in /usr/(local/)share/doc/arno-iptables-firewall) for an example how to manage logging of firewall events  through
       syslogd.

       The arno-fwfilter script can be used to make the firewall logs more readable for humans (see manpage).

       Several plugins for the firewall script are available online. Plugins can be downloaded from http://rocky.eld.leidenuniv.nl/ Please see the
       README file for more information.

FILES

       /etc/init.d/arno-iptables-firewall	       system service script
       /etc/arno-iptables-firewall/firewall.conf       firewall configuration
       /etc/arno-iptables-firewall/conf.d/	       firewall configuration directory
       /etc/arno-iptables-firewall/custom-rules        custom iptables rules
       /etc/arno-iptables-firewall/blocked-hosts       host blacklist
       /etc/arno-iptables-firewall/mac-addresses       mac filter list

       Please note, that the last two files do exist in the initial configuration and their use is disabled  in  /etc/arno-iptables-firewall/fire-
       wall.conf

SEE ALSO

       iptables(8), arno-fwfilter(1), syslog.conf(5)

       The http://rocky.eld.leidenuniv.nl/ web site.

AUTHOR

       arno-iptables-firewall was written by Arno van Amersfoort <arnova@rocky.eld.leidenuniv.nl>.

       This manual page was written by Michael Hanke <michael.hanke@gmail.com>, for the Debian project (but may be used by others).

Michael Hanke							  March 14, 2012					 ARNO-IPTABLES-FIREWALL(8)