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<?xml version="1.0" encoding="utf-8"?>
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<page xmlns="http://projectmallard.org/1.0/" type="topic" style="reference" id="net-firewall-ports" xml:lang="pa">
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<link type="guide" xref="net-security"/>
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<link type="seealso" xref="net-firewall-on-off"/>
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<revision pkgversion="3.4.0" date="2012-02-20" status="final"/>
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<desc>You need to specify the right network port to enable/disable network access for a program with your firewall.</desc>
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<name>Paul W. Frields</name>
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<email>stickster@gmail.com</email>
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<include xmlns="http://www.w3.org/2001/XInclude" href="legal.xml"/>
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<title>Commonly-used network ports</title>
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<p>This is a list of network ports commonly used by applications that provide network services, like file sharing or remote desktop viewing. You can change your system's firewall to <link xref="net-firewall-on-off">block or allow access</link> to these applications. There are thousands of ports in use, so this table isn't complete.</p>
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<table shade="rows" frame="top">
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<p>Allows systems to find each other, and describe which services they offer, without you having to specify the details manually.</p>
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<p>Allows you to send print jobs to a printer over the network.</p>
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<p>Allows you to share your printer with other people over the network.</p>
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<p>Allows you to advertise your instant messaging status to other people on the network, such as "online" or "busy".</p>
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<p>Allows you to share your desktop so other people can view it or provide remote assistance.</p>
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<p>Music sharing (DAAP)</p>
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<p>Allows you to share your music library with others on your network.</p>