Two nics or firewall appliance if a dynamic ip address?

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Hi all,

I'm a relative SBS newbie (a lot of book learnin' but not a lot of
real-world..) and have come into an SBS 2003 Standard with:

* one nic
* only NAT on the router as a "firewall"
* users (5) using pop
* a dsl service that includes a *dynamic* ip address (could move up to
static for $40 more per month - ouch)

I want to give them a real firewall solution and set the users up with
Exchange.

To get around the dynamic ip address I plan to use the DNS2Go Dynamic
DNS service.

I read the great posts here on switching from pop to Exchange which I'm
going to follow.

I was considering adding a nic and setting this box up the "SBS way"
with the included firewall. But would the two nic solution work with
the DNS2Go Dynamic DNS service?

Or should I just use a hardware firewall like a SonicWALL instead of
the two nic solution in this case?

Thanks in advance for any ideas!

Ray

.



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