Re: a death loop with DNS query
On Wed, Jul 06, 2011 at 08:23:45AM -0500, Lyle Giese wrote a message of 56 lines which said: > That is not a loop at all. I disagree. As dig clearly says, there is an horizontal referral: the name servers are supposed to be authoritative for blogchina.org and mytest.blogchina.org but keep sending back the delegation (and with AA set). % dig @112.90.143.36 s1.mytest.blogchina.org ; <<>> DiG 9.7.1 <<>> @112.90.143.36 s1.mytest.blogchina.org ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56637 ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;s1.mytest.blogchina.org. IN A ;; AUTHORITY SECTION: mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. > However at least from here and it appears from where you are doing > the querys, these name servers are not responding. Wrong. They do reply but incorrectly. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: a death loop with DNS query
On 7/6/2011 5:52 AM, Feng He wrote: When I dig this: dig s1.mytest.blogchina.org +trace I got many these info: mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 183.60.59.217#53(ns1.dnsv5.com) in 6 ms mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 112.90.143.36#53(ns1.dnsv5.com) in 116 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 180.153.162.153#53(ns2.dnsv5.com) in 27 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 221.130.12.61#53(ns2.dnsv5.com) in 165 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 122.225.217.194#53(ns2.dnsv5.com) in 24 ms mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. What does this death loop mean? How it happened? Thanks. That is not a loop at all. If you do an A record query for ns1.dnsv5.com and ns2.dnsv5.com, you get four A records returned each. However at least from here and it appears from where you are doing the querys, these name servers are not responding. So Dig is just trying all A records returned. Lyle Giese LCR Computer Services, Inc. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
a death loop with DNS query
When I dig this: dig s1.mytest.blogchina.org +trace I got many these info: mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 183.60.59.217#53(ns1.dnsv5.com) in 6 ms mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 112.90.143.36#53(ns1.dnsv5.com) in 116 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 180.153.162.153#53(ns2.dnsv5.com) in 27 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 221.130.12.61#53(ns2.dnsv5.com) in 165 ms mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. ;; BAD (HORIZONTAL) REFERRAL ;; Received 95 bytes from 122.225.217.194#53(ns2.dnsv5.com) in 24 ms mytest.blogchina.org. 600 IN NS ns1.dnsv5.com. mytest.blogchina.org. 600 IN NS ns2.dnsv5.com. What does this death loop mean? How it happened? Thanks. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
