Hello, >From the dig info below:
C:\dig>dig +nocmd www.nsbeta.info +noall +answer @ns1.google.com www.nsbeta.info. 3497 IN CNAME nsbeta.info. nsbeta.info. 2434 IN A 74.117.232.204 C:\dig>dig +nocmd www.nsbeta.info +noall +answer @ns1.google.com www.nsbeta.info. 3492 IN CNAME nsbeta.info. nsbeta.info. 2429 IN A 74.117.232.204 C:\dig>dig +nocmd www.nsbeta.info +noall +answer @ns1.google.com www.nsbeta.info. 3486 IN CNAME nsbeta.info. nsbeta.info. 2423 IN A 74.117.232.204 I think my office network's DNS is tainted. because: 1) ns1.google.com is authoritative nameserver only, which shouldn't answer this query. 2) the TTL is decreased each time, if it's a real authority answer, the TTL should be all the same. And this is the full output of dig: C:\dig>dig www.nsbeta.info @ns1.google.com ; <<>> DiG 9.3.2 <<>> www.nsbeta.info @ns1.google.com ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1183 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.nsbeta.info. IN A ;; ANSWER SECTION: www.nsbeta.info. 3111 IN CNAME nsbeta.info. nsbeta.info. 2048 IN A 74.117.232.204 ;; Query time: 15 msec ;; SERVER: 216.239.32.10#53(216.239.32.10) ;; WHEN: Wed Jun 08 11:09:09 2011 ;; MSG SIZE rcvd: 74 How to deal with this case? Thanks. Regards. ____________________________________________________________ FREE 3D EARTH SCREENSAVER - Watch the Earth right on your desktop! Check it out at http://www.inbox.com/earth _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users