ZyWALL 10/50 Internet Security Gateway
18.6 Applying a Filter and Factory Defaults
This section shows you where to apply the filter(s) after you design it (them). Sets of factory default filter rules have been configured in menu 21 to prevent NetBIOS traffic from triggering calls, and block incoming telnet, FTP and HTTP connections.
If you do not activate the firewall, it is advisable to apply these default filters as
shown next.18.6.1 LAN traffic
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. See the appendix on filter commands for information on the factory default NetBIOS filter.
| Menu 3.1 – LAN Port Filter Setup |
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| Apply your LAN traffic | |
| Input Filter Sets: |
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| protocol filters= |
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| filters here. |
| device filters= |
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| Output Filter Sets: |
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| protocol filters= |
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| device filters= |
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| Press ENTER to Confirm or ESC to Cancel: |
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18.6.2 Remote Node Filters
Go to menu 11.5 (shown below – note that call filter sets are only present for PPPoE encapsulation) and enter the number(s) of the filter set(s) as appropriate. You can cascade up to four filter sets by entering their
Filter Configuration |