#!/usr/bin/perl -w
use NET::SNMP;
use strict;
use vars qw($session $error $response $syscontact $table $oid);

Usage() unless(defined $ARGV[0]);
Usage() unless(defined $ARGV[1]);

($session, $error) = Net::SNMP->session(
	-hostname => $ARGV[0],
	-community => $ARGV[1]
);

die "session error: $error" unless ($session);

my $tableid = "1.3.6.1.4.1.1991.1.1.4.6.1.1";
$table = $session->get_table($tableid);
die "request error: ".$session->error unless (defined $table);
foreach $oid (keys %$table) {
 if ($oid=~/1.3.6.1.4.1.1991.1.1.4.6.1.1.4.[0-9]+/) {
   my @digits = split (/\./, $oid);
   my $enddig = $digits[-1];
   my $rsportoid = "1.3.6.1.4.1.1991.1.1.4.6.1.1.5.$enddig";
   my $vsnameoid = "1.3.6.1.4.1.1991.1.1.4.6.1.1.2.$enddig";
   my $vsportoid = "1.3.6.1.4.1.1991.1.1.4.6.1.1.3.$enddig";
   print "Real server ".$table->{"$oid"}.", port ".$table->{"$rsportoid"}.", is bound to virtual server ".$table->{"$vsnameoid"}.", on port ".$table->{"$vsportoid"}."\n";
	}
}

$syscontact = $session->get_request("1.3.6.1.2.1.1.4.0");
die "request error: ".$session->error unless (defined $syscontact);
print "For help or questions contact: ".$syscontact->{"1.3.6.1.2.1.1.4.0"}."\n";

$session->close;

sub Usage{
 print(
   "\n",
   "  You didn't provide target hostname or IP address and community string!\n",
   "  Usage: snmp1.pl host_ip|name community_string\n",
   "  Net::SNMP       $Net::SNMP::VERSION\n");
   exit 1;
   }