| Parent | pass | NS records at parent servers | Your NS records at the parent servers are: ns1.virtuaserver.com.br. [ 201.33.19.66 ] ns2.virtuaserver.com.br. [ 69.56.173.126 ] ns3.virtuaserver.com.br. [ 72.20.7.126 ] [These were obtained from e.dns.br.] |
| pass | Glue at parent nameservers | Parent nameservers (I checked with e.dns.br.) know A record for your domain, Very good ! | |
| NS | info | NS records at your nameservers | Your NS records at your nameservers are: At 201.33.19.66 ns.virtuaserver.com.br. [69.56.173.126 ] ns2.virtuaserver.com.br. [69.56.173.126 ] ns1.virtuaserver.com.br. [201.33.19.66 ] ns3.virtuaserver.com.br. [72.20.7.126 ] ns4.virtuaserver.com.br. [173.192.22.156 ] At 69.56.173.126 ns3.virtuaserver.com.br. [72.20.7.126 ] ns.virtuaserver.com.br. [69.56.173.126 ] ns1.virtuaserver.com.br. [201.33.19.66 ] ns2.virtuaserver.com.br. [69.56.173.126 ] ns4.virtuaserver.com.br. [173.192.22.156 ] At 72.20.7.126 ns1.virtuaserver.com.br. [201.33.19.66 ] ns4.virtuaserver.com.br. [173.192.22.156 ] ns2.virtuaserver.com.br. [69.56.173.126 ] ns3.virtuaserver.com.br. [72.20.7.126 ] ns.virtuaserver.com.br. [69.56.173.126 ] |
| pass | Mismatched glue | OK. The DNS report did not detect any discrepancies between the glue provided by the parent servers and that provided by your authoritative DNS servers. | |
| pass | No NS A records at nameservers | OK. Your nameservers do include corresponding A records when asked for your NS records. This ensures that your DNS servers know the A records corresponding to all your NS records. | |
| fail | All nameservers report identical NS records | ERROR. The NS records at all your nameservers are different, check the info above for details. | |
| pass | All nameservers respond | OK. All of your nameservers listed at the parent nameservers responded. | |
| pass | Nameserver name validity | OK. All of the NS records that your nameservers report seem valid (no IPs or partial domain names). | |
| pass | Number of nameservers | OK. You have 3 nameservers. You must have at least 2 nameservers (RFC2182 section 5 recommends at least 3 nameservers), and preferably no more than 7. | |
| pass | Lame nameservers | OK. All the nameservers listed at the parent servers answer authoritatively for your domain. | |
| fail | Missing (stealth) nameservers | ERROR: stealth nameservers (nameservers what does not exist at root servers , but exist at your nameservers) ns.virtuaserver.com.br. at ns1.virtuaserver.com.br. [201.33.19.66] ns4.virtuaserver.com.br. at ns1.virtuaserver.com.br. [201.33.19.66] ns.virtuaserver.com.br. at ns2.virtuaserver.com.br. [69.56.173.126] ns4.virtuaserver.com.br. at ns2.virtuaserver.com.br. [69.56.173.126] ns4.virtuaserver.com.br. at ns3.virtuaserver.com.br. [72.20.7.126] ns.virtuaserver.com.br. at ns3.virtuaserver.com.br. [72.20.7.126] | |
| pass | Missing nameservers 2 | OK. All of the nameservers listed at the parent nameservers are also listed as NS records at your nameservers. | |
| pass | Nameservers on separate class C's | Your nameservers seems to be in different networks. | |
| pass | All NS IPs public | OK. All of your NS records appear to use public IPs. If there were any private IPs, they would not be reachable, causing DNS delays. | |
| SOA | info | SOA record | Your SOA record is: Primary nameserver: ns.virtuaserver.com.br. Hostmaster E-mail address: root.virtuaserver.com.br. Serial #: 1369274253 Refresh: 28800 Retry: 7200 Expire: 604800 Default TTL:39600 |
| pass | NS agreement on SOA Serial # | OK. All your nameservers agree that your SOA serial number is 1369274253. That means that all your nameservers are using the same data. | |
| fail | SOA MNAME Check | ERROR: Your SOA (Start of Authority) record states that your master (primary) name server is: ns.virtuaserver.com.br. That server is not listed at the parent servers, which is not correct. | |
| pass | SOA Serial Number | OK. Your SOA serial number is: 1369274253. This appears to be in the recommended format of YYYYMMDDnn, where 'nn' is the revision. This number must be incremented every time you make a DNS change. | |
| warn | SOA REFRESH value | Your SOA REFRESH interval is : 28800 seconds. This seems too long (about 3600-7200 seconds is good if not using DNS NOTIFY; RFC1912 2.2 recommends a value between 1200 to 43200 seconds (20 minutes to 12 hours)). This value determines how often secondary/slave nameservers check with the master for updates. | |
| pass | SOA RETRY value | Your SOA RETRY interval is : 7200 seconds. This seems normal (about 120-7200 seconds is good). The retry value is the amount of time your secondary/slave nameservers will wait to contact the master nameserver again if the last attempt failed. | |
| pass | SOA EXPIRE value | Your SOA EXPIRE time is : 604800 seconds. This seems normal (about 1209600 to 2419200 seconds (2-4 weeks) is good). RFC1912 suggests 2-4 weeks. This is how long a secondary/slave nameserver will wait before considering its DNS data stale if it can't reach the primary nameserver. | |
| pass | SOA MINIMUM TTL value | Your SOA MINIMUM TTL is : 39600 seconds. This seems normal (about 3,600 to 86400 seconds or 1-24 hours is good). RFC2308 suggests a value of 1-3 hours. This value used to determine the default (technically, minimum) TTL (time-to-live) for DNS entries, but now is used for negative caching. | |