Why should I use Firewall Zones and not just Address Objects?

Posted by SRobertJames on Server Fault See other posts from Server Fault or by SRobertJames
Published on 2011-01-16T02:18:59Z Indexed on 2011/01/16 2:54 UTC
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Filed under:

networking

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firewall

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cisco

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sonicwall

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juniper

I appreciate Firewall Address Objects and Address Groups - they simplify management by letting me give a name to a group of addresses.

But I don't understand what Firewall Zones (LAN, WAN, DMZ, etc.) do for me over Address Groups. I know all firewalls have them, so there must be a good reason. But what do I gain by stating a rule applies to all traffic from LAN Zone to WAN Zone which comes from LAN Address Group to WAN Address Group? Why not just mention the Address Groups?

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