Troubleshooting slow DNS lookup
Tony Finch
dot at dotat.at
Wed Dec 8 17:16:58 UTC 2010
On Wed, 8 Dec 2010, Rianto Wahyudi wrote:
>
> - Does any one have a good example of prominent website that have
> DNSEC setup properly other than paypal?
> - Any example of dns record that send packet larger than 512 ?
; <<>> DiG 9.6.2-P2 <<>> +multiline +dnssec www.cam.ac.uk
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27436
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 8, ADDITIONAL: 11
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 4096
;; QUESTION SECTION:
;www.cam.ac.uk. IN A
;; ANSWER SECTION:
www.cam.ac.uk. 77902 IN A 131.111.8.46
www.cam.ac.uk. 77902 IN RRSIG A 5 4 86400 20110103030147 (
20101204030850 34770 cam.ac.uk.
m80OuIdqTxhSGGCbpzoksKHjdSyfaS9eALUEE0X7dwnh
Z2jrhoGKaz2snJ3XbRUwebJSNSt7Ej4Mw50buRD77Rlj
kMumdYEmzYDSOewZ93CEE54nVzkGUQWYnVxsK1uRxSYK
vA== )
;; AUTHORITY SECTION:
cam.ac.uk. 4362 IN NS dns0.eng.cam.ac.uk.
cam.ac.uk. 4362 IN NS bitsy.mit.edu.
cam.ac.uk. 4362 IN NS ns2.ic.ac.uk.
cam.ac.uk. 4362 IN NS dns0.cl.cam.ac.uk.
cam.ac.uk. 4362 IN NS authdns1.csx.cam.ac.uk.
cam.ac.uk. 4362 IN NS authdns0.csx.cam.ac.uk.
cam.ac.uk. 4362 IN NS dns1.cl.cam.ac.uk.
cam.ac.uk. 81614 IN RRSIG NS 5 3 86400 20110105004959 (
20101206071226 34770 cam.ac.uk.
XuKl+Pwh7HenDLpOmoIssHE5ZOSug1b9+SLhIEdXtWDb
cB4zViCtCxJFz8yC41feAy5g2w+6Cc9RAiNexZf3E+PU
gQQd+w3UHn5VwNRJroDw4TKMAlsG7LcFvOYuPOKeXyIv
Jw== )
;; ADDITIONAL SECTION:
ns2.ic.ac.uk. 73348 IN A 155.198.142.82
dns0.cl.cam.ac.uk. 14636 IN A 128.232.0.19
dns0.cl.cam.ac.uk. 14636 IN AAAA 2001:630:200:ac70::d:a0
dns0.eng.cam.ac.uk. 162 IN A 129.169.8.8
dns1.cl.cam.ac.uk. 14636 IN A 128.232.0.18
authdns1.csx.cam.ac.uk. 162 IN A 131.111.12.37
authdns1.csx.cam.ac.uk. 162 IN AAAA 2001:630:200:8120::d:a1
ns2.ic.ac.uk. 73348 IN RRSIG A 5 4 86400 20101228214539 (
20101128205350 4743 ic.ac.uk.
VGps8nLXC3hA9vuNKD9K4unAxNeL02U4DQuBe9XRXbgk
OCRRQpgzxSNw8S+MS5H740EiquYCb4GhARRwP32Jpxya
tR+eGlersDIsGZGpH88mZ9zm8kReZaHNTv3+ENU0fDKt
LOou+4SfA+ca7/348PAKmRsR8EA/KpMFm6ofIYs= )
authdns1.csx.cam.ac.uk. 162 IN RRSIG A 5 5 86400 20110104233031 (
20101206031205 34770 cam.ac.uk.
JKDGs3+vXx+OkFGXQ+ZZZllikf4Q1ab9hiteQNthlQ6y
j7nFtg6HvoGqPFT6DicPeMLUCI68GLpWKJcuC+Z8z5IE
pMxnAKAjMKdlHibdRzTCT6JBu+4Q7w0opKo0cEI81i/G
8Q== )
authdns1.csx.cam.ac.uk. 162 IN RRSIG AAAA 5 5 86400 20101225154130 (
20101125184850 34770 cam.ac.uk.
CLGNGErElJOiOufuNl5M3q3rfZWlxxNzCIBHRf6hjuKS
1KfoAdhLuFJCTcYHj7seN0PqHeKi0cniKXIh1KPX9knk
TUrzfxettAcige0vgez7t8HliB3001Xie49hujWYiZvP
/g== )
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Dec 8 17:17:18 2010
;; MSG SIZE rcvd: 1088
Tony.
--
f.anthony.n.finch <dot at dotat.at> http://dotat.at/
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