Figure 9-6. Menu 21.1.1 - Tcp/Ip Filter Rule Menu - NETGEAR RT338 Reference Manual

Reference Guide for the Model RT338 ISDN Router
Set "Active" to Yes, and specify the IP Protocol as 17, which is the UDP protocol number
3.
(in decimal) from the Assigned Numbers RFC.
Specify Source Port #137, NetBIOS Naming Service, and set the Port # Comparison field
4.
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.
Press ENTER to Confirm or ESC to Cancel:
Figure 9-6. Menu 21.1.1 - TCP/IP Filter Rule Menu
9-12
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
Configuring Filters