webcat.info DNS Report

Health Score: 59%

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Checked: 2 months before

Parent

NS records at parent servers

dns1.yandex.net
dns12yandex.net
[These were obtained from a2.info.afilias-nst.info.]

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

Skip glue checking. Make sure the nameservers domain is good standing Check yandex.net Check net

Nameservers A records 0/7

Some servers does not provide A records for nameservers.
missing A record(s) for (dns1.yandex.net,dns2.yandex.net) at nameserver 213.180.204.213

Nameservers report identical NS records 7/7

SUCCESS The NS records at all your nameservers are identical.

Nameservers respond 0/10

Some nameservers does not respond:
104.239.213.7

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 0/7

DANGER There are nameservers not listed at the parent servers:
dns2.yandex.net.

Root missing nameservers 0/7

DANGER There are nameservers not listed at your nameservers:
dns12yandex.net.

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
saidnavy.yandex.ru
Serial
2018032903
Refresh
14400
Retry
900
Expire
1209600
TTL
21600

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 2018032903 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: dns1.yandex.net That server is listed at the parent servers, which is correct.

Serial value 1/1

SUCCESS SOA serial number is: 2018032903 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.

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 : 900 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 : 1209600 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 : 21600 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 webcat.info
lookup webcat.info at A.ROOT-SERVERS.NET(198.41.0.4) 14 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a2.info.afilias-nst.info(199.249.113.1)
lookup webcat.info at a2.info.afilias-nst.info(199.249.113.1) 9 ms
a2.info.afilias-nst.info(199.249.113.1) refer to dns12yandex.net(unknow IP)
extra IP lookup for dns12yandex.net at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup dns12yandex.net at A.ROOT-SERVERS.NET(198.41.0.4) 13 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to e.gtld-servers.net(192.12.94.30)
lookup dns12yandex.net at e.gtld-servers.net(192.12.94.30) 11 ms
RECORD does not exist
lookup webcat.info at dns12yandex.net() 14 ms
dns12yandex.net() refer to g.root-servers.net(unknow IP)
extra IP lookup for g.root-servers.net at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup g.root-servers.net at A.ROOT-SERVERS.NET(198.41.0.4) 21 ms
got A record 'g.root-servers.net IN A 192.112.36.4' from g.root-servers.net(198.41.0.4)
lookup webcat.info at g.root-servers.net(192.112.36.4) 59 ms
g.root-servers.net(192.112.36.4) refer to c0.info.afilias-nst.info(199.254.49.1)
lookup webcat.info at c0.info.afilias-nst.info(199.254.49.1) 11 ms
c0.info.afilias-nst.info(199.254.49.1) refer to dns1.yandex.net(unknow IP)
extra IP lookup for dns1.yandex.net at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup dns1.yandex.net at A.ROOT-SERVERS.NET(198.41.0.4) 16 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to e.gtld-servers.net(192.12.94.30)
lookup dns1.yandex.net at e.gtld-servers.net(192.12.94.30) 23 ms
e.gtld-servers.net(192.12.94.30) refer to ns9.z5h64q92x9.net(195.156.199.201)
lookup dns1.yandex.net at ns9.z5h64q92x9.net(195.156.199.201) 115 ms
got A record 'dns1.yandex.net IN A 213.180.204.213' from dns1.yandex.net(195.156.199.201)
lookup webcat.info at dns1.yandex.net(213.180.204.213) 128 ms
got A record 'webcat.info IN A 85.214.124.160' from webcat.info(213.180.204.213)
Total time: 434 ms