Netgear RT338 RT338 Reference Manual - Page 159

Filter.fm Page 12 Friday, October 6, 2000 5:28 PM Reference Guide for the Model RT338 ISDN Router 3. Set "Active" to Yes, and specify the IP Protocol as 17, which is the UDP protocol number (in decimal) from the Assigned Numbers RFC. 4. Specify Source Port #137, NetBIOS Naming Service, and set the Port # Comparison field to look for port numbers "equal" to 137. For packets that match this comparison, you want to drop the packet, so set Action Matched to "Drop." For packets not matching, you want to continue to the next rule, so set Action Not Matched to "Check Next Rule." Figure 9-6 shows Menu 21.1.1 - TCP/IP Filter Rule. Menu 21.1.1 - TCP/IP Filter Rule Filter #: 1,1 Filter Type= TCP/IP Filter Rule Active= Yes IP Protocol= 17 IP Source Route= No Destination: IP Addr= 0.0.0.0 IP Mask= 0.0.0.0 Port #= 0 Port # Comp= None Source: IP Addr= 0.0.0.0 IP Mask= 0.0.0.0 Port #= 137 Port # Comp= Equal TCP Estab= N/A More= No Log= None Action Matched= Drop Action Not Matched= Check Next Rule Press ENTER to Confirm or ESC to Cancel: Figure 9-6. Menu 21.1.1 - TCP/IP Filter Rule Menu 9-12 Configuring Filters