Nortel Contivity 221 User Manual page 483

This command forwards WAN to LAN and WAN to LAN NetBIOS packets
sys filter netbios config 3 on
Command:
This command blocks IPSec NetBIOS packets
sys filter netbios config 4 off
Command:
This command stops NetBIOS commands from initiating calls.
NetBIOS Filter Commands J-3
Contivity 221 VPN Switch User's Guide