cprjz.com DNS Report

Health Score: 82%

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Checked: 3 weeks before

Parent

NS records at parent servers

ns1.alidns.com [ 106.11.141.111 106.11.141.121 106.11.211.51 106.11.211.61 140.205.41.11 140.205.41.21 140.205.81.11 140.205.81.21 ]
ns2.alidns.com [ 106.11.141.112 106.11.141.122 106.11.211.52 106.11.211.62 140.205.41.12 140.205.41.22 140.205.81.12 140.205.81.22 ]
[These were obtained from e.gtld-servers.net.]

Glue at parent nameservers 7/7

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

NS

Mismatched glue 0/7

The glue provided by the root servers does not match glue that provided by your authoritative DNS servers.
(ns1.alidns.com.		172800	IN	A	106.11.141.111) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	106.11.141.121) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	106.11.211.51) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	106.11.211.61) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	140.205.41.11) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	140.205.41.21) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	140.205.81.11) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns1.alidns.com.		172800	IN	A	140.205.81.21) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	106.11.141.112) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	106.11.141.122) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	106.11.211.52) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	106.11.211.62) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	140.205.41.12) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	140.205.41.22) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	140.205.81.12) present at Parent, missing at (140.205.81.21, 140.205.81.22)
(ns2.alidns.com.		172800	IN	A	140.205.81.22) present at Parent, missing at (140.205.81.21, 140.205.81.22)

Nameservers A records 0/7

Some servers does not provide A records for nameservers.
missing A record(s) for (ns2.alidns.com,ns1.alidns.com) at nameserver 140.205.81.21
missing A record(s) for (ns2.alidns.com,ns1.alidns.com) at nameserver 140.205.81.22

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
hostmaster.hichina.com
Serial
2017102010
Refresh
3600
Retry
1200
Expire
86400
TTL
600

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 2017102010 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.alidns.com That server is listed at the parent servers, which is correct.

Serial value 1/1

SUCCESS SOA serial number is: 2017102010 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 : 3600 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 : 1200 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 : 600 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 cprjz.com
lookup cprjz.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 cprjz.com at e.gtld-servers.net(192.12.94.30) 8 ms
e.gtld-servers.net(192.12.94.30) refer to ns1.alidns.com(106.11.141.111)
lookup cprjz.com at ns1.alidns.com(106.11.141.111) 231 ms
got A record 'cprjz.com IN A 103.59.102.226' from cprjz.com(106.11.141.111)
Total time: 249 ms