ZyXEL Prestige 202H Plus ISDN Router 91-003-154001B 用户手册

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P-202H Plus v2 User’s Guide
Chapter 25 Filter Configuration
236
Figure 136   Filter Rule Process
You can apply up to four filter sets to a particular port to block multiple types of packets. With 
each filter set having up to six rules, you can have a maximum of 24 rules active for a single 
port.
25.2  Configuring a Filter Set
The ZyXEL Device includes filtering for NetBIOS over TCP/IP packets by default. To 
configure another filter set, follow the procedure below. 
Enter 21 in the main menu to open menu 21.