Netgear RP114 User Manual download pdf (Page 123)

Reference Guide for the Model RP114 Web Safe Router

Configuring Filters 10-11

Default Filters

The Model RP114 router is preconfigured with the filters shown in Figure 10-1 on page 10-2 and

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 11.5 - Remote Node 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.

Filter 3: TEL_FTP_WEB_WAN

The TEL_FTP_WEB_LAN filter is an IP protocol filter used to block Telnet, HTTP, and FTP

requests to the router from the Internet. The filter blocks TCP packets with a destination port of 21

(FTP), 23 (Telnet), or 80 (HTTP).

This filter is not used, but can be applied in Menu 11.5 - Remote Node Filter as an Input Filter set.

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Netgear RP114 User Manual Page 123