* Drunkard Zhang: > My capture command: tcpdump -s 0 -nnnvvv -w 360.cn-`date +%Y%m%d`.pcap > udp port 53 > > 17:59:36 ~ $ dig +nocmd speedtest.360.cn @211.161.192.1 +multiline > +noall +answer > speedtest.360.cn. 215 IN CNAME speedtest.360.cn.cloudcdn.net. > speedtest.360.cn.cloudcdn.net. 325 IN CNAME cloud010005.cachecn.com. > cloud010005.cachecn.com. 368 IN A 61.155.141.28 > > but bind just resolved cloud010005.cachecn.com again.
With a cold cache, I see this: [1au] A? speedtest.360.cn. ar: . OPT UDPsize=4096 OK (45) [1au] A? speedtest.360.cn.cloudcdn.net. ar: . OPT UDPsize=4096 OK (58) [1au] A? cloud010005.cachecn.com. ar: . OPT UDPsize=4096 OK (52) I suspect that the middle CNAME is still in cache in your case. -- Florian Weimer <fwei...@bfk.de> BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstraße 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99 _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users