Appendix M Netbios Filter Commands - ZyXEL Communications ZyWALL 5 User Manual

The following describes the NetBIOS packet filter commands. See the Command Interpreter appendix
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
sys filter netbios disp
Syntax:
This command gives a read-only list of the current NetBIOS filter modes for The ZyWALL.
=========== NetBIOS Filter Status ===========
Diagram M-1 NetBIOS Display Filter Settings Command Example
The filter types and their default settings are as follows.
NAME
Between LAN This field displays whether NetBIOS packets are blocked or forwarded
and WAN between the LAN and the WAN.
Between LAN This field displays whether NetBIOS packets are blocked or forwarded
and DMZ between the LAN and the DMZ.
Between WAN This field displays whether NetBIOS packets are blocked or forwarded
and DMZ between the WAN and the DMZ.
IPSec Packets This field displays whether NetBIOS packets sent through a VPN connection
are blocked or forwarded.
NetBIOS Filter Commands
NetBIOS Filter Commands
Between LAN and WAN: Block
Between LAN and DMZ: Block
Between WAN and DMZ: Block
IPSec Packets: Forward
Trigger Dial: Disabled
Chart M-1 NetBIOS Filter Default Settings
DESCRIPTION
ZyWALL 5 Internet Security Appliance
Appendix M
EXAMPLE
Block
Block
Block
Forward
M-1