ZyWALL 5/35/70 Series User’s Guide

APPENDIX O

NetBIOS Filter Commands

The following describes the NetBIOS packet filter commands. See Appendix M on page 750 for information on the command structure.

Introduction

NetBIOS (Network Basic Input/Output System) are TCP or UDP broadcast packets that enable a computer to connect to and communicate with a LAN.

For some dial-up services such as PPPoE or PPTP, NetBIOS packets cause unwanted calls.

You can configure NetBIOS filters to do the following:

•Allow or disallow the sending of NetBIOS packets from the LAN to the WAN and from the WAN to the LAN.

•Allow or disallow the sending of NetBIOS packets from the LAN to the DMZ and from the DMZ to the LAN.

•Allow or disallow the sending of NetBIOS packets from the WAN to the DMZ and from the DMZ to the WAN.

•Allow or disallow the sending of NetBIOS packets through VPN connections.

•Allow or disallow NetBIOS packets to initiate calls.

Display NetBIOS Filter Settings

Syntax: sys filter netbios disp

This command gives a read-only list of the current NetBIOS filter modes for The ZyWALL.

NetBIOS Display Filter Settings Command Example

=========== NetBIOS Filter Status ===========

Between LAN and WAN: Block

Between LAN and DMZ: Block

Between WAN and DMZ: Block

IPSec Packets: Forward

Trigger Dial: Disabled

Appendix O NetBIOS Filter Commands

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