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Appendix I NetBIOS Filter Commands
ZyWALL 2 Plus User’s Guide
654
The filter types and their default settings are as follows.
NetBIOS Filter Configuration
Syntax:sys filter netbios config <type> <on|off>
where
Table 240 NetBIOS Filter Default Settings
NAME DESCRIPTION EXAMPLE
Between LAN
and WAN
This field displays whether NetBIOS packets are blocked or forwarded
between the LAN and the WAN.
Block
Between LAN
and DMZ
This field displays whether NetBIOS packets are blocked or forwarded
between the LAN and the DMZ.
Block
Between WAN
and DMZ
This field displays whether NetBIOS packets are blocked or forwarded
between the WAN and the DMZ.
Block
IPSec Packets This field displays whether NetBIOS packets sent through a VPN
connection are blocked or forwarded.
Forward
Trigger dial This field displays whether NetBIOS packets are allowed to initiate
calls. Disabled means that NetBIOS packets are blocked from
initiating calls.
Disabled
<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
<on|off> =
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
This command blocks LAN to WAN and WAN to LAN NetBIOS
packets.
sys filter netbios
config 1 off
This command forwards LAN to DMZ and DMZ to LAN NetBIOS
packets.
sys filter netbios
config 3 on
This command blocks IPSec NetBIOS packets.
sys filter netbios
config 4 off
This command stops NetBIOS commands from initiating calls.