<div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"></div><div class="gmail_quote"><div class="gmail_attr">I also heard this policy is used by some ISPs as a excuse of "stealing" the traffic or kind of rent-seeking for purging cache. It's complex and not a pure technical problem. </div><div class="gmail_attr"><br></div><div class="gmail_attr">Davey</div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Sometimes the long time stale response is caused by a sensitive "use stale response when encounter timeout or servfail to authoriative nameserver" policy</div>
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