Reheated Bagle comes with side of source code

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name one that does?

Name one OS that does start its firewall services prior to its networking services? Mac, all the *nix variants, even portable devices all start their network services first, and then follow with the firewall and other security services. Firewall services are usually dependent upon the underlying protcol stacks in order to function. Regardless of which OS you use, network funcionality is always brought online prior to firewall services, if it weren't, DHCP and BootP wouldn't be able to function, as the service wouldn't be able to identify the interface network address in use (since they don't exist at that point) and thus it wouldn't know what to block or what not to block.

Firewalls primarily function at layer 3 and 4 of the OSI model, if you want to coneptualize it (some can function at layer 2, but require an underlaying switched architecture for the protected networks and related software to be of any use) (and yes I know they also function at layer 1 and 2, but the basic firewall services aren't provided until layer 3 and 4). Network services have to be brought online so that the interface card and stacks are initialized (layer 1 and layer 2), then the protocol stacks come online (layer 3), and then the rest proceeds upward. Until the protocol stacks are initialized, a firewall is useless, and seeing as how it depends on them by its very nature, they can't start without it already being in place, in much the same way a traffic light can't function without the streets already in place.

Though MS starts the network services, it DOESnot actually engage its workstation or server services completely before the firewall is loaded, like all other OS's. The network services start first, then the firewall services, then the network application services (workstation, server, email, web, etc).

Posted by: tamuhockey   Posted on: 07/06/04 You are currently: a Guest | Members login | Terms of Use

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