Hi all, Im trying to troubleshoot and find out the reason why some of our DNS lookup take a long time :
ns-dev ~ # rndc flushname www.paypal.com ; dig www.paypal.com @localhost ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> www.paypal.com @localhost ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29297 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 3, ADDITIONAL: 2 ;; QUESTION SECTION: ;www.paypal.com. IN A ;; ANSWER SECTION: www.paypal.com. 300 IN A 64.4.241.33 www.paypal.com. 300 IN A 64.4.241.49 www.paypal.com. 300 IN A 66.211.169.2 www.paypal.com. 300 IN A 66.211.169.65 ;; AUTHORITY SECTION: paypal.com. 252 IN NS ns2.isc-sns.com. paypal.com. 252 IN NS ns3.isc-sns.info. paypal.com. 252 IN NS ns1.isc-sns.net. ;; ADDITIONAL SECTION: ns3.isc-sns.info. 3559 IN A 63.243.194.1 ns3.isc-sns.info. 86352 IN AAAA 2001:5a0:10::1 ;; Query time: 5119 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Fri Nov 26 12:05:49 2010 ;; MSG SIZE rcvd: 225 Doing trace : ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> www.paypal.com @localhost +trace ;; global options: printcmd . 516870 IN NS i.root-servers.net. . 516870 IN NS j.root-servers.net. . 516870 IN NS k.root-servers.net. . 516870 IN NS l.root-servers.net. . 516870 IN NS m.root-servers.net. . 516870 IN NS a.root-servers.net. . 516870 IN NS b.root-servers.net. . 516870 IN NS c.root-servers.net. . 516870 IN NS d.root-servers.net. . 516870 IN NS e.root-servers.net. . 516870 IN NS f.root-servers.net. . 516870 IN NS g.root-servers.net. . 516870 IN NS h.root-servers.net. ;; Received 492 bytes from 127.0.0.1#53(127.0.0.1) in 2 ms com. 172800 IN NS b.gtld-servers.net. com. 172800 IN NS h.gtld-servers.net. com. 172800 IN NS f.gtld-servers.net. com. 172800 IN NS m.gtld-servers.net. com. 172800 IN NS c.gtld-servers.net. com. 172800 IN NS e.gtld-servers.net. com. 172800 IN NS d.gtld-servers.net. com. 172800 IN NS a.gtld-servers.net. com. 172800 IN NS g.gtld-servers.net. com. 172800 IN NS l.gtld-servers.net. com. 172800 IN NS j.gtld-servers.net. com. 172800 IN NS i.gtld-servers.net. com. 172800 IN NS k.gtld-servers.net. ;; Received 504 bytes from 192.36.148.17#53(i.root-servers.net) in 57 ms paypal.com. 172800 IN NS ns1.isc-sns.net. paypal.com. 172800 IN NS ns2.isc-sns.com. paypal.com. 172800 IN NS ns3.isc-sns.info. ;; Received 177 bytes from 192.33.14.30#53(b.gtld-servers.net) in 5498 ms www.paypal.com. 300 IN A 66.211.169.65 www.paypal.com. 300 IN A 64.4.241.33 www.paypal.com. 300 IN A 64.4.241.49 www.paypal.com. 300 IN A 66.211.169.2 paypal.com. 300 IN NS ns3.isc-sns.info. paypal.com. 300 IN NS ns1.isc-sns.net. paypal.com. 300 IN NS ns2.isc-sns.com. ;; Received 285 bytes from 72.52.71.1#53(ns1.isc-sns.net) in 174 ms Version of bind installed : bind-9.3.6-4.P1.el5_4.2 IPv6 has been disabled on the host and firewall turned off during the test. Any toughts ? Regards, Rianto
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