DNS report for zone “haining.info”
Hostmaster for zone haining.info is: root@haining.infoIP settings (as seen from ns1.haining.info)
error
You have less than 2 nameservers. You need to have at least 2 nameservers!
info
You have nameservers in several C-Nets, that's good!
Mail settings (as seen from ns1.haining.info)
warn
You have only 1 mailserver. Consider getting a backup one!
Zone as seen from “ns1.haining.info” [61.153.232.98]
info
ns1.haining.info is running the latest version of the zone(2002121062).
info
SOA serial seems to follow good standards. We recommend it to be in YYYYMMDDxx-format, which yours appear to be. This would suggest that your zone was last updated at 2002-12-10, and has been updated 63 times on that day.
warn
This nameserver supports zone transfers. This enables people to fetch a list of all DNS records in your zone. To view the list please click here!
error
Your nameserver supports recursion. This is really bad to have activated on public nameservers since they can then be used for amplification of Denial Of Service attacks! You can find more information about it here: http://www.us-cert.gov/reading_room/DNS-recursion033006.pdf
info
Your nameserver responds to queries via TCP.
info
Your nameserver responds authorative for the zone.
info
Your SOA refresh value of 240 minutes is good.
warn
A SOA retry value of 14400 is too infrequent, we propose you set this to a value inbetween 120 and 7200 seconds.
warn
A SOA expiry value of 3600000 is quite high. You should consider lowering this to a value inbetween 2 and 4 weeks. This value defines for how long the zone should be valid when the slaves are unable to reach the master.
warn
A minimum TTL (Time To Live) of 86400 is quite high. RFC2308 recommends a minimum TTL between 1-3 hours.