artsphera.com.ua DNS Report

Health Score: 80%

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Checked: 1 month before

Parent

NS records at parent servers

uns2.1gb.ru
ns1.1gb.ua [ 195.234.4.10 195.234.4.10 ]
[These were obtained from uns2.1gb.ru.]

Glue at parent nameservers 0/7

WARNING The parent servers are not providing glue for all your nameservers. This means that they are supplying the NS records (host.example.com), but not supplying the A records. That may cause some extra milliseconds in DNS. This will usually occur if your DNS servers are not in the same TLD as your domain

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 0/7

Some servers does not provide A records for nameservers.
missing A record(s) for (uns2.1gb.ru) at nameserver 195.234.5.20
missing A record(s) for (uns2.1gb.ru) at nameserver 195.234.4.10

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
noc.1gb.com.ua
Serial
37
Refresh
900
Retry
600
Expire
86400
TTL
3600

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 37 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: ns1.1gb.ua That server is listed at the parent servers, which is correct.

Serial value 0/1

WARNING SOA serial number is: 37 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 0/1

WARNING SOA Retry interval is : 900 seconds. This seems too small. (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 : 600 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 0/1

WARNING SOA Expire time is : 86400 seconds. This seems too small. (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 artsphera.com.ua
lookup artsphera.com.ua at A.ROOT-SERVERS.NET(198.41.0.4) 9 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to cd1.ns.ua(194.0.1.9)
lookup artsphera.com.ua at cd1.ns.ua(194.0.1.9) 3 ms
cd1.ns.ua(194.0.1.9) refer to ba1.ns.ua(74.123.224.37)
lookup artsphera.com.ua at ba1.ns.ua(74.123.224.37) 67 ms
ba1.ns.ua(74.123.224.37) refer to uns2.1gb.ru(unknow IP)
extra IP lookup for uns2.1gb.ru at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup uns2.1gb.ru at A.ROOT-SERVERS.NET(198.41.0.4) 9 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.dns.ripn.net(193.232.128.6)
lookup uns2.1gb.ru at a.dns.ripn.net(193.232.128.6) 121 ms
a.dns.ripn.net(193.232.128.6) refer to ns2.1gb.RU(unknow IP)
extra IP lookup for ns2.1gb.RU at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup ns2.1gb.RU at A.ROOT-SERVERS.NET(198.41.0.4) 9 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.dns.ripn.net(193.232.128.6)
lookup ns2.1gb.RU at a.dns.ripn.net(193.232.128.6) 124 ms
a.dns.ripn.net(193.232.128.6) refer to ns2.1gb.RU(unknow IP)
extra IP lookup for ns2.1gb.RU at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup ns2.1gb.RU at A.ROOT-SERVERS.NET(198.41.0.4) 9 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.dns.ripn.net(193.232.128.6)
lookup ns2.1gb.RU at a.dns.ripn.net(193.232.128.6) 121 ms
a.dns.ripn.net(193.232.128.6) refer to ns3.1gb-ru.com(unknow IP)
extra IP lookup for ns3.1gb-ru.com at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup ns3.1gb-ru.com at A.ROOT-SERVERS.NET(198.41.0.4) 10 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to e.gtld-servers.net(192.12.94.30)
lookup ns3.1gb-ru.com at e.gtld-servers.net(192.12.94.30) 9 ms
e.gtld-servers.net(192.12.94.30) refer to ns1.neuprime.com(94.249.192.15)
lookup ns3.1gb-ru.com at ns1.neuprime.com(94.249.192.15) 93 ms
got A record 'ns3.1gb-ru.com IN A 94.249.192.249' from ns3.1gb-ru.com(94.249.192.15)
lookup ns2.1gb.RU at ns3.1gb-ru.com(94.249.192.249) 96 ms
got A record 'ns2.1gb.RU IN A 195.161.112.91' from ns2.1gb.RU(94.249.192.249)
lookup ns2.1gb.RU at ns2.1gb.RU(195.161.112.91) 130 ms
got A record 'ns2.1gb.RU IN A 195.161.112.91' from ns2.1gb.RU(195.161.112.91)
lookup uns2.1gb.ru at ns2.1gb.RU(195.161.112.91) 140 ms
got A record 'uns2.1gb.ru IN A 195.234.5.20' from uns2.1gb.ru(195.161.112.91)
lookup artsphera.com.ua at uns2.1gb.ru(195.234.5.20) 110 ms
got A record 'artsphera.com.ua IN A 195.234.4.61' from artsphera.com.ua(195.234.5.20)
Total time: 1060 ms