Isolate server on LAN but still give internet access

I am working on a migration project from SBS 2003 to 2011 for a client out of state.
At this point, I need to be able to set up the migrated server with internet access without allowing it to touch the LAN or other machines using the clients existing WAN connection.

Any thoughts? The new server MUST be isolated from the LAN or it will be a bad day for everyone! Thanks.
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JP_TechGroupAsked:
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Norm DickinsonGuruCommented:
You will probably want to separate your network into at least two different VLANs, or virtual Local Area Networks. It's done at Layer 2 of the OSI model and would suffice for your purposes. See http://www.smallnetbuilder.com/lanwan/lanwan-howto/30071-vlan-how-to-segmenting-a-small-lan for an overview or some more detailed, Cisco-specific information at http://www.cisco.com/en/US/docs/routers/7600/ios/12.2SXF/configuration/guide/vlans.pdf to get you started.
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djcanterCommented:
Second the VLAN suggestion.  Broadcast and UDP traffic will be constrained to the VLAN and will not cause SBS to panic. If your network gear isnt VLAN capable, you can just setup a second router and switch to accommodate the new server.
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Red-KingIT ManagerCommented:
As tqfdotus said, you can add a new VLAN to the network if you have a switch and that you can manage. Alternatively you can just create a new subnet for the new server which should require all traffic between subnets to be sent to the router.
On the router you will need an ACL or something to that effect to prevent traffic being passed between the 2 subnets.
You could also add a rule to the firewall of the clients on the original subnet which will reject traffic from the new subnet.
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JP_TechGroupAuthor Commented:
Yea, the VLAN was the way I wanted to go... unfortunately they lack the hardware...
I was considering using a separate router, but I am not positive that this will isolate the box to my satisfaction. I think I'll give the subnet mask a try (now why didn't I think of that).
Be back in a few! Thanks all.
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