DNS Problems Domain Wide

- June 25, 2012

after coming campus christmas , new year's break, began experiencing believe dns issues. internet pages sporadically not loading properly, , many times users "internet explorer cannot display webpage" error. here's example:

usually refreshing page couple of times make page load correctly. haven't changed settings on our dcs. point our dns opendns. i've contacted tech support, claim there nothing wrong dns server configurations. i've flushed dns , manually pointed several pcs on campus other public dns servers, hasn't helped.

my primary dc has no dns error logs, secondary dc has 1 event 5501 error log few days back, nothing 3 weeks ago when problem started.

let me explain 1 other thing...our internet pipe comes our state board office 65 miles our campus. on christmas break, state board replaced router in office our pipe comes through (they made other changes prepare switching on 100mb pipe, don't know details of transpired). network engineers @ state board tell me can find nothing wrong on end, seems odd problem started after returned christmas break, , place changes made @ state board.

does have suggestions can try? i'm @ wits end here :-(

one other thing, clarify, our college on separate domain state board.

thanks,

jeff

it doesnt sound dns issue me. the fact page opened , see of cnn content means can resolve host names. do have proxy system or other filtering on network hampering packets transmitting , forth. can locate problem on 1 part of network? can ask state board people if see same. if not, can determine @ point in network occuring. that should determine look.

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