ZyWALL 5/35/70 Series User’s Guide

The filter types and their default settings are as follows.

Table 272 NetBIOS Filter Default Settings

NAME

DESCRIPTION

EXAMPLE

 

 

 

Between LAN

This field displays whether NetBIOS packets are blocked or forwarded

Block

and WAN

between the LAN and the WAN.

 

Between LAN

This field displays whether NetBIOS packets are blocked or forwarded

Block

and DMZ

between the LAN and the DMZ.

 

Between WAN

This field displays whether NetBIOS packets are blocked or forwarded

Block

and DMZ

between the WAN and the DMZ.

 

IPSec Packets

This field displays whether NetBIOS packets sent through a VPN

Forward

 

connection are blocked or forwarded.

 

Trigger dial

This field displays whether NetBIOS packets are allowed to initiate

Disabled

 

calls. Disabled means that NetBIOS packets are blocked from initiating

 

 

calls.

 

NetBIOS Filter Configuration

Syntax:sys filter netbios config <type> <onoff>

where

 

 

 

<type>

=

Identify which NetBIOS filter (numbered 0-3) to configure.

 

 

0

= Between LAN and WAN

 

 

1

= Between LAN and DMZ

 

 

2

= Between WAN and DMZ

 

 

3

= IPSec packet pass through

 

 

4

= Trigger Dial

<onoff>

=

For type 0 and 1, use on to enable the filter and block NetBIOS

 

 

packets. Use off to disable the filter and forward NetBIOS packets.

For type 3, use on to block NetBIOS packets from being sent through a VPN connection. Use off to allow NetBIOS packets to be sent through a VPN connection.

For type 4, use on to allow NetBIOS packets to initiate dial backup calls. Use off to block NetBIOS packets from initiating dial backup calls.

Example commands

sys filter netbios config 0 on

sys filter netbios config 1 off

This command blocks LAN to WAN and WAN to LAN NetBIOS packets.

This command forwards LAN to DMZ and DMZ to LAN NetBIOS packets.

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Appendix O NetBIOS Filter Commands