Hello, Please see the dig info below. ns1.dns-diy.com is the auth-server of duowan.com domain. My question is, when ns1.dns-diy.com answer with a CNAME for "udb.duowan.com", and the answer also include an A RR for that alias, how will the public DNS cache servers handle this answer? Will the DNS cache use this A RR as result directly, or they make a new request for the alias domain name udb.duowan.blogchina.org and find the result?
Thanks! $ dig udb.duowan.com +trace ; <<>> DiG 9.4.2-P2 <<>> udb.duowan.com +trace ;; global options: printcmd . 108212 IN NS d.root-servers.net. . 108212 IN NS e.root-servers.net. . 108212 IN NS m.root-servers.net. . 108212 IN NS b.root-servers.net. . 108212 IN NS g.root-servers.net. . 108212 IN NS l.root-servers.net. . 108212 IN NS c.root-servers.net. . 108212 IN NS i.root-servers.net. . 108212 IN NS k.root-servers.net. . 108212 IN NS a.root-servers.net. . 108212 IN NS j.root-servers.net. . 108212 IN NS h.root-servers.net. . 108212 IN NS f.root-servers.net. ;; Received 512 bytes from 202.96.128.86#53(202.96.128.86) in 4 ms com. 172800 IN NS h.gtld-servers.net. com. 172800 IN NS g.gtld-servers.net. com. 172800 IN NS e.gtld-servers.net. com. 172800 IN NS c.gtld-servers.net. com. 172800 IN NS d.gtld-servers.net. com. 172800 IN NS a.gtld-servers.net. com. 172800 IN NS l.gtld-servers.net. com. 172800 IN NS f.gtld-servers.net. com. 172800 IN NS k.gtld-servers.net. com. 172800 IN NS b.gtld-servers.net. com. 172800 IN NS i.gtld-servers.net. com. 172800 IN NS m.gtld-servers.net. com. 172800 IN NS j.gtld-servers.net. ;; Received 492 bytes from 128.8.10.90#53(d.root-servers.net) in 340 ms duowan.com. 172800 IN NS ns1.dns-diy.com. duowan.com. 172800 IN NS ns2.dns-diy.com. ;; Received 204 bytes from 192.35.51.30#53(f.gtld-servers.net) in 300 ms udb.duowan.com. 90000 IN CNAME udb.duowan.blogchina.org. udb.duowan.blogchina.org. 5 IN A 64.38.63.4 ;; Received 86 bytes from 218.85.139.33#53(ns1.dns-diy.com) in 19 ms -- Free SmartDNS Hosting: http://DNSbed.com/ _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
