diff -up ypbind-mt-1.29.91/man/ypbind.8.xml.man-port ypbind-mt-1.29.91/man/ypbind.8.xml
--- ypbind-mt-1.29.91/man/ypbind.8.xml.man-port	2009-06-15 16:29:18.000000000 +0200
+++ ypbind-mt-1.29.91/man/ypbind.8.xml	2009-10-26 17:55:32.000000000 +0100
@@ -47,6 +47,7 @@
       <arg choice='opt'>-ypset </arg>
       <arg choice='opt'>-ypsetme </arg>
       <arg choice='opt'>-no-ping </arg>
+      <arg choice='opt'>-p <replaceable>port</replaceable></arg>
       <arg choice='opt'>-f <replaceable>configfile</replaceable></arg>
       <arg choice='opt'>-local-only </arg>
       <arg choice='opt'>-ping-interval <replaceable>ping-interval</replaceable></arg>
@@ -238,6 +239,15 @@ from keeping the connection unnecessaril
   </listitem>
   </varlistentry>
   <varlistentry>
+  <term><option>-p</option> port</term>
+  <listitem>
+<para><command>ypbind</command>
+will bind itself to this port. This makes it possible to have a router 
+filtering packets to the NIS ports, so that access to this service from
+hosts on the Internet can be restricted.</para>
+  </listitem>
+  </varlistentry>
+  <varlistentry>
   <term><option>-f</option> configfile</term>
   <listitem>
 <para><command>ypbind</command>