Carnell Chan
New Member
Hi there,
Recently I observed a very weird phenomenon, that some of the DNS requests for my domain will return 0.0.0.0 on the primary local DNS while resolve correctly on the secondary local DNS. This happens elsewhere too (on several public DNS), but not everywhere.
The questionable domain query is for @.cxqn.info., which I set an A record directly at ZoneEdit (no URL Forwarder etc.). Here are several query results:
Can anyone suggest some probable cause? Thanks in advance!
Recently I observed a very weird phenomenon, that some of the DNS requests for my domain will return 0.0.0.0 on the primary local DNS while resolve correctly on the secondary local DNS. This happens elsewhere too (on several public DNS), but not everywhere.
The questionable domain query is for @.cxqn.info., which I set an A record directly at ZoneEdit (no URL Forwarder etc.). Here are several query results:
- $ dig cxqn.info @ns19.zoneedit.com
cxqn.info. 450 IN A 172.96.126.76
- $ dig cxqn.info @8.8.8.8 (Google Public DNS)
cxqn.info. 449 IN A 172.96.126.76
- $ dig cxqn.info @208.67.222.222 (OpenDNS primary)
cxqn.info. 23287 IN A 0.0.0.0 - $ dig cxqn.info @208.67.220.220 (OpenDNS secondary)
cxqn.info. 450 IN A 172.96.126.76
- $ dig cxqn.info @dns-a.tsinghua.edu.cn (institutional DNS primary)
cxqn.info. 18753 IN A 0.0.0.0
- $ dig cxqn.info @dns-b.tsinghua.edu.cn (institutional DNS secondary)
cxqn.info. 5444 IN A 172.96.126.76
- $ dig cxqn.info @219.141.136.10 (ISP DNS primary, China Telecom Beijing)
cxqn.info. 450 IN A 172.96.126.76
- $ dig cxqn.info @219.141.136.10 (ISP DNS secondary, China Telecom Beijing)
cxqn.info. IN A
Can anyone suggest some probable cause? Thanks in advance!