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<th colspan="3" align="center">LPRng Reference Manual: 24
Sep 2004 (For LPRng-3.8.28)</th>
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<h1 class="SECT1"><a name="AEN8967" id="AEN8967">17.5. Complex
Permission Checking</a></h1>
<p>One of the more useful types of permission checking is to
restrict access to your printers from users outside your
networks. The IP pattern can specify a list of IP addresses and
netmasks to apply to them.</p>
<p>For example <tt class="LITERAL">IP=10.3.4.0/24</tt> would
match all hosts with the IP addresses <tt class=
"LITERAL">IP=10.3.4.0</tt> to <tt class=
"LITERAL">IP=10.3.4.255</tt>.</p>
<p>Similarly, the HOST pattern can specify a set of hostnames
or patterns to match against based on the GLOB notation.</p>
<p>For example <tt class="LITERAL">REMOTEHOST=*.private</tt>
would match all hosts with a DNS entry which ended with
<tt class="FILENAME">private</tt>.</p>
<p>The NOT keyword reverses the match sense. For example
<tt class="LITERAL">REJECT NOT
REMOTEHOST=*.private,*.murphy.com</tt> would reject all
requests from hosts which did not have a DNS entry ending in
<tt class="FILENAME">private</tt> or <tt class=
"FILENAME">murphy.com</tt>.</p>
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