Must take personal firewall offline to see the network?

I installed a Cisco 871 router on my network as a firewall to a DSL connection with the firewall set to medium. I used the same IP range I had been using with my previous firewall and set up DHCP.

Since I made the changes, I have one user that has to take their personal firewall down to see the network. (It is Norton)

Do you have any idea why?
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Matrix1000Asked:
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RPPreacherCommented:
Probably they mucked up the rules in the norton firewall.  Look at their block rules.
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Fatal_ExceptionSystems EngineerCommented:
I believe this has little to do with your router.. and agree with RPP that Norton is the culprit..  personally, I don't allow any of these 'security' software appliances on any of my internal clients..  always causes issues with a P2P network..   (Norton AV is okay, although I would not use it either due to many things, inlcuding its overhead..)
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Fatal_ExceptionSystems EngineerCommented:
Thanks, and best of luck with this..!

FE
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