Default Filters; Filter 1: Netbios_Wan; Filter 2: Netbios_Lan - NETGEAR RP114 Reference Manual

Default Filters

The Model RP114 router is preconfigured with the filters shown in
in this section.

Filter 1: NetBIOS_WAN

The NetBIOS_WAN filter is an IP protocol filter used to prevent the sending of Windows
NetBIOS name service packets to the ISP. The ports used by NetBIOS name service are:
• 137 (TCP and UDP) NetBIOS Name Service
• 138 (TCP and UDP) NetBIOS Datagram Service
• 139 (TCP and UDP) NetBIOS Session Service
This filter is applied in Menu 4.1 - WAN Port Filter as an Output Filter set.

Filter 2: NetBIOS_LAN

The NetBIOS_LAN filter is an IP protocol filter used to block NetBIOS name service requests
from a local PC to the DNS server of the ISP. These requests are UDP packets having a source port
of 137 (NNS) and a destination port of 53 (DNS).
This filter is applied in Menu 3.1 - LAN Port Filter as an Input Filter set.
Configuring Filters
Reference Guide for the Model RP114 Web Safe Router
Figure 10-1 on page 10-2 and
10-11