diff -up ypbind-mt-1.20.4/man/ypbind.8_old ypbind-mt-1.20.4/man/ypbind.8
--- ypbind-mt-1.20.4/man/ypbind.8_old	2008-12-03 14:13:46.000000000 +0100
+++ ypbind-mt-1.20.4/man/ypbind.8	2008-12-03 14:15:56.000000000 +0100
@@ -14,7 +14,7 @@
 ypbind \- NIS binding process
 .SH "SYNOPSIS"
 .HP 7
-\fBypbind\fR [\-c] [\-d | \-debug] [\-verbose] [\-broadcast] [\-broken\-server] [\-ypset] [\-ypsetme] [\-no\-ping] [\-f\ \fIconfigfile\fR] [\-local\-only] [\-ping\-interval\ \fIping\-interval\fR] [\-no\-dbus]
+\fBypbind\fR [\-c] [\-d | \-debug] [\-verbose] [\-broadcast] [\-broken\-server] [\-ypset] [\-ypsetme] [\-no\-ping] [\-p \fIport\fR] [\-f\ \fIconfigfile\fR] [\-local\-only] [\-ping\-interval\ \fIping\-interval\fR] [\-no\-dbus]
 .HP 7
 \fBypbind\fR \-\-version
 .SH "DESCRIPTION"
@@ -140,6 +140,13 @@ will not check if the binding is alive. 
 \fBypbind\fR
 from keeping the connection unnessecarily open or causing autodials.
 .TP 3n
+\fB\-p\fR port
+\fBypbind\fR
+will bind itself to this port.
+This makes it possible to have a router filter packets
+to the NIS ports, so that access to this service from
+hosts on the Internet can be restricted.
+.TP 3n
 \fB\-f\fR configfile
 \fBypbind\fR
 will use