can you try the next command:
dig -x 10.100.128.1
Eliezer
On 03/03/2016 08:04, Dan Charlesworth wrote:
Like this:
# time nslookup httpbin.org
Server: 192.231.203.3
Address: 192.231.203.3#53
Non-authoritative answer:
Name: httpbin.org
Address: 54.175.222.246
real 0m0.026s
user 0m0.001s
sys 0m0.004s
# time dig httpbin.org
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.37.rc1.el6_7.6 <<>> httpbin.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44477
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUESTION SECTION:
;httpbin.org. IN A
;; ANSWER SECTION:
httpbin.org. 577 IN A 54.175.222.246
;; AUTHORITY SECTION:
httpbin.org. 6161 IN NS ns-769.awsdns-32.net.
httpbin.org. 6161 IN NS ns-1074.awsdns-06.org.
httpbin.org. 6161 IN NS ns-410.awsdns-51.com.
httpbin.org. 6161 IN NS ns-1756.awsdns-27.co.uk.
;; ADDITIONAL SECTION:
ns-410.awsdns-51.com. 9966 IN A 205.251.193.154
ns-769.awsdns-32.net. 13639 IN A 205.251.195.1
ns-1074.awsdns-06.org. 11459 IN A 205.251.196.50
ns-1756.awsdns-27.co.uk. 11489 IN A 205.251.198.220
;; Query time: 21 msec
;; SERVER: 192.231.203.3#53(192.231.203.3)
;; WHEN: Thu Mar 3 17:03:04 2016
;; MSG SIZE rcvd: 246
real 0m0.026s
user 0m0.004s
sys 0m0.001s
On 3 Mar 2016, at 4:55 PM, Eliezer Croitoru <eliezer@xxxxxxxxxxxx> wrote:
Hey Dan,
What dig+nslookup queries did you tested for?
Eliezer
On 03/03/2016 07:39, Dan Charlesworth wrote:
Right now we have 1 squid box (out of a lot), running 3.5.13, which does something like this for every request, taking about 10 seconds:
2016/03/03 16:30:48.883 kid1| 78,3| dns_internal.cc(1794) idnsPTRLookup: idnsPTRLookup: buf is 43 bytes for 10.100.128.1, id = 0x733a
2016/03/03 16:30:48.883 kid1| 78,3| dns_internal.cc(1745) idnsALookup: idnsALookup: buf is 29 bytes for httpbin.org, id = 0x8528
2016/03/03 16:30:48.883 kid1| 78,3| dns_internal.cc(1683) idnsSendSlaveAAAAQuery: buf is 29 bytes for httpbin.org, id = 0x69c2
2016/03/03 16:30:48.884 kid1| 78,3| dns_internal.cc(1277) idnsRead: idnsRead: starting with FD 7
2016/03/03 16:30:48.884 kid1| 78,3| dns_internal.cc(1323) idnsRead: idnsRead: FD 7: received 93 bytes from 192.231.203.132:53
2016/03/03 16:30:48.884 kid1| 78,3| dns_internal.cc(1130) idnsGrokReply: idnsGrokReply: QID 0x733a, -3 answers
2016/03/03 16:30:48.884 kid1| 78,3| dns_internal.cc(1195) idnsGrokReply: idnsGrokReply: error Name Error: The domain name does not exist. (3)
2016/03/03 16:30:53.884 kid1| 78,3| dns_internal.cc(1384) idnsCheckQueue: idnsCheckQueue: ID dns8 QID 0x8528: timeout
2016/03/03 16:30:53.884 kid1| 78,3| dns_internal.cc(1384) idnsCheckQueue: idnsCheckQueue: ID dns0 QID 0x69c2: timeout
2016/03/03 16:30:53.885 kid1| 78,3| dns_internal.cc(1277) idnsRead: idnsRead: starting with FD 7
2016/03/03 16:30:53.885 kid1| 78,3| dns_internal.cc(1323) idnsRead: idnsRead: FD 7: received 110 bytes from 172.16.100.4:53
2016/03/03 16:30:53.885 kid1| 78,3| dns_internal.cc(1130) idnsGrokReply: idnsGrokReply: QID 0x69c2, 0 answers
2016/03/03 16:30:58.885 kid1| 78,3| dns_internal.cc(1384) idnsCheckQueue: idnsCheckQueue: ID dns8 QID 0x8528: timeout
2016/03/03 16:30:58.886 kid1| 78,3| dns_internal.cc(1277) idnsRead: idnsRead: starting with FD 7
2016/03/03 16:30:58.886 kid1| 78,3| dns_internal.cc(1323) idnsRead: idnsRead: FD 7: received 246 bytes from 172.16.100.5:53
2016/03/03 16:30:58.886 kid1| 78,3| dns_internal.cc(1130) idnsGrokReply: idnsGrokReply: QID 0x8528, 1 answers
AND YET, every nslookup or dig done at the command line on the same server is lightning fast. I’ve tried local and ISP-level DNS servers and get the same result.
What could be going on here?
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