dnsauth3.sys.gtei.net DNS record is poisoned???


Today, some of our customers could not resolve
state.gov by our cache server.

I found state.gov is served by dnsauth1.sys.gtei.net,
dnsauth2.sys.gtei.net, dnsauth3.sys.gtei.net. Using
some others' DNS servers I found their IP addresses
should be,, But, our cache
server(BIND9.3.1) got some othere IPs( I've tried
restart bind9.3.1). So, it always failed to resolve
state.gov. After restarting BIND9.3.1 again, I did
"rndc flush" for several times, then it comes back.

Why? is there something poisoned ?


=========== BIND9 got wrong server IP ====

set debug

Server: dnsv2.zjhzptt.net.cn

;; res_nmkquery(QUERY, dnsauth1.sys.gtei.net, IN, A)