I am fairly new to the PIX admin team but have what seems to be a strange problem. Our PIXs are setup to perform an explicit deny to all WWW traffic from our retail stores minus exceptions. We had a rule to allow our pharmacies to visit The Center for Disease Control (www.cdc.gov) but over the last few weeks the rule no longer works. If you perform a lookup on www.cdc.gov, it responds with a DCS address (*.mirror-image.net). How can I create a rule on the PIX using this information which will allow http traffic to www.cdc.gov?