pa.infobox.ru DNS Report

Health Score: 96%

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Checked: 11 months before

Parent

NS records at parent servers

ns1.pa.infobox.ru [ 77.221.140.41 ]
ns2.pa.infobox.ru [ 77.221.128.146 ]
[These were obtained from ns3.infobox.org.]

Glue at parent nameservers 7/7

SUCCESS Parent nameservers know A records for your domain, Very good !

NS

Mismatched glue 7/7

SUCCESS The DNS report did not detect any discrepancies between the glue provided by the parent servers and that provided by your authoritative DNS servers.

Nameservers A records 7/7

SUCCESS 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.

Nameservers report identical NS records 7/7

SUCCESS The NS records at all your nameservers are identical.

Nameservers respond 10/10

SUCCESS All of your nameservers listed at the parent nameservers responded.

Nameserver name validity 7/7

SUCCESS All of the NS records that your nameservers report are valid (no IPs or partial domain names).

Number of nameservers 2/5

WARNING You have 2 nameservers. You must have at least 2 nameservers (RFC2182 section 5 recommends at least 3 nameservers), and preferably no more than 7.

Lame nameservers 7/7

SUCCESS All the nameservers listed at the parent servers answer authoritatively for your domain.

Missing (stealth) nameservers 7/7

SUCCESS All your nameservers are also listed at the parent servers.

Root missing nameservers 7/7

SUCCESS All of the nameservers listed at the parent nameservers are also listed as NS records at your nameservers.

Nameservers on separate class C's 7/7

SUCCESS Nameservers are in a different networks.

public IPs 7/7

SUCCESS All of your NS records appear to use public IPs.

SOA

SOA record

SOA record is:
Hostmaster email
no-reply.infobox.ru
Serial
1219711
Refresh
14400
Retry
7200
Expire
2419200
TTL
3600

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 1219711 That means that all your nameservers are using the same data.

SOA MNAME 3/3

SUCCESS SOA (Start of Authority) record states that your master (primary) name server is: ns1.pa.infobox.ru That server is listed at the parent servers, which is correct.

Serial value 0/1

WARNING SOA serial number is: 1219711 This not 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.

Refresh value 1/1

SUCCESS SOA Retry interval is : 14400 seconds. This seems OK. (Values 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.

Retry value 1/1

SUCCESS SOA Retry interval is : 7200 seconds. This seems OK. (Values 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.

Expire value 1/1

SUCCESS SOA Expire time is : 2419200 seconds. This seems OK. (Values 604800 to 2419200 seconds (1-4 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.

TTL value 1/1

SUCCESS SOA Expire time is : 3600 seconds. This seems OK. (about 300 to 86400 seconds or 5 min - 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.

Info

DNS trace

Trace to pa.infobox.ru
lookup pa.infobox.ru at A.ROOT-SERVERS.NET(198.41.0.4) 14 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.dns.ripn.net(193.232.128.6)
lookup pa.infobox.ru at a.dns.ripn.net(193.232.128.6) 134 ms
a.dns.ripn.net(193.232.128.6) refer to ns4.infobox.org(unknow IP)
extra IP lookup for ns4.infobox.org at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup ns4.infobox.org at A.ROOT-SERVERS.NET(198.41.0.4) 41 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a0.org.afilias-nst.info(199.19.56.1)
lookup ns4.infobox.org at a0.org.afilias-nst.info(199.19.56.1) 155 ms
a0.org.afilias-nst.info(199.19.56.1) refer to dns1.name-services.com(unknow IP)
extra IP lookup for dns1.name-services.com at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup dns1.name-services.com at A.ROOT-SERVERS.NET(198.41.0.4) 35 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.gtld-servers.net(192.5.6.30)
lookup dns1.name-services.com at a.gtld-servers.net(192.5.6.30) 26 ms
a.gtld-servers.net(192.5.6.30) refer to dns1.name-services.com(162.88.61.23)
lookup dns1.name-services.com at dns1.name-services.com(162.88.61.23) 12 ms
got A record 'dns1.name-services.com IN A 162.88.61.23' from dns1.name-services.com(162.88.61.23)
lookup ns4.infobox.org at dns1.name-services.com(162.88.61.23) 8 ms
got A record 'ns4.infobox.org IN A 109.120.180.17' from ns4.infobox.org(162.88.61.23)
lookup pa.infobox.ru at ns4.infobox.org(109.120.180.17) 100 ms
ns4.infobox.org(109.120.180.17) refer to ns2.pa.infobox.ru(77.221.128.146)
lookup pa.infobox.ru at ns2.pa.infobox.ru(77.221.128.146) 117 ms
RECORD does not exist
Total time: 642 ms