Bay Technical Associates RM356 - Manual (Page 88)

Reference Guide for the Model RM356 Modem Router
8-12 Filter Configuration
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 as described on page 8-10.
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 8-4 shows Menu 21.1.1 - TCP/IP Filter Rule.
Figure 8-4. TCP/IP Filter Rule Menu
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: