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Firewall advice

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Last Modified: 2012-05-09
Hi,  we recently disconnected our Cisco firewall ASA 5510 when upgrading to a new T3 line through our ISP Qwest. Qwest informed us we no longer needed our firewall, and we provided configuration for the firewall to qwest. They said they have a firewall on their own network and to call them should i need any configuration changes.

My question is, did i make a mistake removing my Cisco firewall and going to qwest, does this leave me open or vulnerable to attacks? We have over 50 clients and 4 servers on our network. Thanks, any advise would be greatly appreciated.
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