ZyXEL Communications P-334WT Support Notes page 135

Apply the first filter set 'NetBIOS_WAN' to the
activating it.
Configure the second filter set 'NetBIOS_LAN' by selecting the Filter Set number 2.
Rule 1-Source port number 137, Destination port number 53 with protocol number 6 (TCP)
'Output Protocol Filter'
Menu 11.5 - Remote Node Filter
Input Filter Sets:
protocol filters=
device filters=
Output Filter Sets:
protocol filters=
device filters=
Call Filter Sets:
protocol filters=
device filters=
Press ENTER to Confirm or ESC to Cancel:
Menu 21.2.1 - TCP/IP Filter Rule
Filter #: 2,1
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6
Destination: IP Addr= 0.0.0.0
Source: IP Addr= 0.0.0.0
IP Source Route= No
IP Mask= 0.0.0.0
Port #= 53
Port # Comp= Equal
IP Mask= 0.0.0.0
Port #= 137
Port # Comp= Equal
in menu 11.5 for