Hello Everyone Our two dns servers run solaris 10 and play Maser and Slave role of our department. our bind version are 9.5.0. recently this two boxes refuse to do recursive response at night 22:00 and keep on for several hours (our users' number will reach the peak at that duration) . so I collect the "rndc stats" data and make a gnuplot graphic pictures. Found that: When that time reached,
1, Request and Query recursion number is as high as impossible 2, Query and Query Success number is very low What happened to our server ? are they under attack? for someone wander I upload the pictures to follow urls, picture when Problem happen http://www.flickr.com/photos/ryanqian/2943392841/sizes/o/ picture when it runs normal http://www.flickr.com/photos/ryanqian/2943392843/sizes/o/
