ZyXEL Communications Internet Security Gateway ZyWALL 2 Series - Manual (Page 581)

ZyWALL 2 Series User’s Guide
NetBIOS Filter Commands M-1
Appendix M
NetBIOS Filter Commands
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 between the LAN and 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
Diagram M-1 NetBIOS Display Filter Settings Command Example
Syntax: sys filter netbios disp
This command gives a read-only list of the current NetBIOS filter modes.
Diagram M-2 NetBIOS Display Filter Settings Command Example
The filter types and their default settings are as follows.
ras> sys filter netbios disp
=========== NetBIOS Filter Status ===========
Between LAN and WAN: Block
IPSec Packets: Forward
Trigger Dial: Disabled