--- a/html/cgi-bin/ovpnmain.cgi	
+++ a/html/cgi-bin/ovpnmain.cgi	
@@ -388,6 +388,9 @@ sub writeserverconf {
          print CONF "push \"dhcp-option WINS $wins_server\"\n";
      }
  
+    if ($vpnsettings{BLOCK_OUTSIDE_DNS} eq 'on') {
+        print CONF "push \"block-outside-dns\"\n";
+    }
      if ($vpnsettings{MAX_CLIENTS} eq '') {
  	print CONF "max-clients 100\n";
      }
@@ -1098,6 +1101,7 @@ if ($cgiparams{'ACTION'} eq 
$Lang::tr{'save-adv-options'}) {
      $vpnsettings{'DHCP_DOMAIN'} = $cgiparams{'DHCP_DOMAIN'};
      $vpnsettings{'DHCP_DNS'} = $cgiparams{'DHCP_DNS'};
      $vpnsettings{'DHCP_WINS'} = $cgiparams{'DHCP_WINS'};
+    $vpnsettings{'BLOCK_OUTSIDE_DNS'} = $cgiparams{'BLOCK_OUTSIDE_DNS'};
      $vpnsettings{'ROUTES_PUSH'} = $cgiparams{'ROUTES_PUSH'};
      $vpnsettings{'DATACIPHERS'} = $cgiparams{'DATACIPHERS'};
      $vpnsettings{'DCIPHER'} = $cgiparams{'DCIPHER'};
@@ -2722,6 +2726,9 @@ ADV_ERROR:
      $selected{'DPROTOCOL'}{'tcp'} = '';
      $selected{'DPROTOCOL'}{$vpnsettings{'DPROTOCOL'}} = 'SELECTED';
  
+    $checked{'BLOCK_OUTSIDE_DNS'}{'off'} = '';
+    $checked{'BLOCK_OUTSIDE_DNS'}{'on'} = '';
+    $checked{'BLOCK_OUTSIDE_DNS'}{$vpnsettings{'BLOCK_OUTSIDE_DNS'}} = 
'CHECKED';
      $checked{'REDIRECT_GW_DEF1'}{'off'} = '';
      $checked{'REDIRECT_GW_DEF1'}{'on'} = '';
      $checked{'REDIRECT_GW_DEF1'}{$vpnsettings{'REDIRECT_GW_DEF1'}} = 
'CHECKED';
@@ -2936,6 +2943,12 @@ END
  						<input type='TEXT' name='DHCP_WINS' value='$wins_servers' size='30' 
/>
  					</td>
  				</tr>
+				<tr>
+					<td>$Lang::tr{'ovpn block outside dns'}</td>
+					<td>
+						<input type='checkbox' name='BLOCK_OUTSIDE_DNS' 
$checked{'BLOCK_OUTSIDE_DNS'}{'on'} />
+					</td>
+				</tr>
  			</table>
  
  			<h6>$Lang::tr{'ovpn routing settings'}</h6>
--- a/langs/en/cgi-bin/en.pl	
+++ a/langs/en/cgi-bin/en.pl	
@@ -2068,6 +2068,7 @@ 
  'override mtu' => 'Override default MTU',
  'ovpn' => 'OpenVPN',
  'ovpn add conf' => 'Additional configuration',
+'ovpn block outside dns' => 'Block outside DNS',
  'ovpn ciphers' => 'Ciphers',
  'ovpn con stat' => 'OpenVPN Connection Statistics',
  'ovpn config' => 'OVPN-Config',