1) This server is not allowed to ping. But from one network monitoring machine on the same IP range, we can ping 198.41.0.4
2) The following is dig result form one machine. Thanks and Best Regards, Xiao 2/16/2011 # dig @127.0.0.1 ; <<>> DiG 8.3 <<>> @127.0.0.1 ; (1 server found) ;; res options: init recurs defnam dnsrch ;; got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4 ;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 7 ;; QUERY SECTION: ;; ., type = NS, class = IN ;; ANSWER SECTION: . 5d22h41m23s IN NS h.root-servers.net. . 5d22h41m23s IN NS a.root-servers.net. . 5d22h41m23s IN NS f.root-servers.net. . 5d22h41m23s IN NS m.root-servers.net. . 5d22h41m23s IN NS b.root-servers.net. . 5d22h41m23s IN NS l.root-servers.net. . 5d22h41m23s IN NS d.root-servers.net. . 5d22h41m23s IN NS e.root-servers.net. . 5d22h41m23s IN NS i.root-servers.net. . 5d22h41m23s IN NS k.root-servers.net. . 5d22h41m23s IN NS c.root-servers.net. . 5d22h41m23s IN NS j.root-servers.net. . 5d22h41m23s IN NS g.root-servers.net. ;; ADDITIONAL SECTION: a.root-servers.net. 5d22h41m23s IN A 198.41.0.4 b.root-servers.net. 5d22h41m23s IN A 192.228.79.201 c.root-servers.net. 5d22h41m23s IN A 192.33.4.12 d.root-servers.net. 5d22h41m23s IN A 128.8.10.90 e.root-servers.net. 5d22h41m23s IN A 192.203.230.10 f.root-servers.net. 5d22h41m23s IN A 192.5.5.241 g.root-servers.net. 5d22h41m23s IN A 192.112.36.4 ;; Total query time: 1 msec ;; FROM: www7 to SERVER: 127.0.0.1 127.0.0.1 ;; WHEN: Wed Feb 16 17:59:04 2011 ;; MSG SIZE sent: 17 rcvd: 340 # dig @127.0.0.1 ; <<>> DiG 8.3 <<>> @127.0.0.1 ; (1 server found) ;; res options: init recurs defnam dnsrch ;; got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4 ;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 7 ;; QUERY SECTION: ;; ., type = NS, class = IN ;; ANSWER SECTION: . 5d22h41m23s IN NS h.root-servers.net. . 5d22h41m23s IN NS a.root-servers.net. . 5d22h41m23s IN NS f.root-servers.net. . 5d22h41m23s IN NS m.root-servers.net. . 5d22h41m23s IN NS b.root-servers.net. . 5d22h41m23s IN NS l.root-servers.net. . 5d22h41m23s IN NS d.root-servers.net. . 5d22h41m23s IN NS e.root-servers.net. . 5d22h41m23s IN NS i.root-servers.net. . 5d22h41m23s IN NS k.root-servers.net. . 5d22h41m23s IN NS c.root-servers.net. . 5d22h41m23s IN NS j.root-servers.net. . 5d22h41m23s IN NS g.root-servers.net. ;; ADDITIONAL SECTION: a.root-servers.net. 5d22h41m23s IN A 198.41.0.4 b.root-servers.net. 5d22h41m23s IN A 192.228.79.201 c.root-servers.net. 5d22h41m23s IN A 192.33.4.12 d.root-servers.net. 5d22h41m23s IN A 128.8.10.90 e.root-servers.net. 5d22h41m23s IN A 192.203.230.10 f.root-servers.net. 5d22h41m23s IN A 192.5.5.241 g.root-servers.net. 5d22h41m23s IN A 192.112.36.4 ;; Total query time: 1 msec ;; FROM: www7 to SERVER: 127.0.0.1 127.0.0.1 ;; WHEN: Wed Feb 16 17:59:04 2011 ;; MSG SIZE sent: 17 rcvd: 340 -----Original Message----- From: bind-users-bounces+xhuang=graphnet....@lists.isc.org [mailto:bind-users-bounces+xhuang=graphnet....@lists.isc.org] On Behalf Of Torinthiel Sent: Wednesday, February 16, 2011 5:47 PM To: bind-users@lists.isc.org Subject: Re: Please Help On 02/16/11 23:24, Xiaoxu Huang wrote: > From couple of our DNS servers, we are failed to get correct DNS answer > like followings: > > 1) From server A > # nslookup > Default Server: localhost > Address: 127.0.0.1 > > www.nyc.gov > Server: localhost > Address: 127.0.0.1 > *** localhost can't find www.nyc.gov: Non-existent host/domain#nslookup > > 2) From server B: > # nslookup > > www.nyc.gov > ;; connection timed out; no servers could be reached > > 3) Both servers run bind-9.7.2-P2 And your configuration is? (both named.conf and network topology) Try (from both servers) a) dig @127.0.0.1 b) ping 198.41.0.4 (which is a.root-servers.net's IP address) Torinthiel _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
