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DNS issue with barracuda 210 web filter

dankyle67 asked
Last Modified: 2012-05-11
recently we installed a barracuda 210 web filter in our network and for some reason when we go to certain sites its really slow to load but yahoo loads instantly.  Support said they had to clear dns cache on their end but still have problem.  They also ran unix tool to do a lookup on our secondary dns server which we input onto the ip settings of the barracuda and they said it didnt respond however when i ping it on our internal network no problem.  I actually ran namebench software to check for fastest dns server in our area and it found a better address so put that as our primary and used google dns as secondary.  My question is that when i looked at our internal dns server i didnt see any external ip address in there referencing either the primary or secondary dns server that we use on both the barracuda and on netscreen 5gt router we have.  Is there supposed to be an entry in the internal dns server referencing or listing at least one of the dns servers? Thanks.
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