ZyXEL 2WG Betriebsanweisung

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Chapter 41 Filter Configuration
ZyWALL 2WG User’s Guide
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If you do not activate the firewall, it is advisable to apply filters.
41.6.1  Applying LAN Filters
LAN traffic filter sets may be useful to block certain packets, reduce traffic and prevent 
security breaches. Go to menu 3.1 (shown next) and enter the number(s) of the filter set(s) that 
you want to apply as appropriate. You can choose up to four filter sets (from twelve) by 
entering their numbers separated by commas, e.g., 3, 4, 6, 11. Input filter sets filter incoming 
traffic to the ZyWALL and output filter sets filter outgoing traffic from the ZyWALL. For 
PPPoE or PPTP encapsulation, you have the additional option of specifying remote node call 
filter sets.
Figure 413   Filtering LAN Traffic
41.6.2  Applying DMZ Filters
DMZ traffic filter sets may be useful to block certain packets, reduce traffic and prevent 
security breaches. Go to menu 5.1 (shown next) and enter the number(s) of the filter set(s) that 
you want to apply as appropriate. You can choose up to four filter sets (from twelve) by 
entering their numbers separated by commas, e.g., 3, 4, 6, 11. Input filter sets filter incoming 
traffic to the ZyWALL and output filter sets filter outgoing traffic from the ZyWALL. The 
ZyWALL already has filters to prevent NetBIOS traffic from triggering calls, and block 
incoming telnet, FTP and HTTP connections. 
Figure 414   Filtering DMZ Traffic
         Menu 3.1 - LAN Port Filter Setup
Input Filter Sets:                    
  protocol filters=                       
    device filters=                  
Output Filter Sets:                    
  protocol filters=                      
    device filters= 
Press ENTER to Confirm or ESC to Cancel:
     Menu 5.1 - DMZ Port Filter Setup
Input Filter Sets:  
  protocol filters=     
    device filters=
Output Filter Sets:  
  protocol filters=    
    device filters=
Press ENTER to Confirm or ESC to Cancel: