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Add a real-life postrule example now that we have one

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fyodor
2011-03-29 00:01:58 +00:00
parent cd462ade8f
commit c4f133158b
1 changed files with 14 additions and 7 deletions
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21
docs/scripting.xml
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@@ -562,13 +562,20 @@ Black Hat Briefings in 2010.</para>
<listitem>
<para>These scripts run after Nmap has scanned all of its
targets. They can be useful for formatting and presenting
Nmap output. For example, a postrule script could print a
reverse-index of the Nmap output&mdash;showing which hosts
run a particular service rather than just listing the
services on each host. They are distinguished from other
script types by containing a <literal>postrule</literal>
function.
targets. They can be useful for formatting and presenting
Nmap output. For example, <ulink role="hidepdf"
url="http://nmap.org/nsedoc/scripts/ssh-hostkey.html">ssh-hostkey</ulink>
is best known for its service (portrule) script which
connects to SSH servers, discovers their public keys, and
prints them. But it also includes a postrule which checks
for duplicate keys amongst all of the hosts scanned, then
prints any that are found. Another potential use for a
postrule script is printing a reverse-index of the Nmap
output&mdash;showing which hosts run a particular service
rather than just listing the services on each host.
Postrule scripts are identified by containing a
<literal>postrule</literal> function.
</para>
<para>Many scripts could potentially run as either a prerule