jobs-lab.org DNS Report

Health Score: 79%

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Checked: 1 week before

Parent

NS records at parent servers

wx20.wadax.ne.jp
wns01.wadax.ne.jp
[These were obtained from d0.org.afilias-nst.org.]

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 wadax.ne.jp

Nameservers A records 0/7

Some servers does not provide A records for nameservers.
missing A record(s) for (wx20.wadax.ne.jp,wns01.wadax.ne.jp) at nameserver 202.189.182.2
missing A record(s) for (wns01.wadax.ne.jp) at nameserver 211.1.224.194

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
postmaster.jobs-lab.org
Serial
3941664385
Refresh
28800
Retry
14400
Expire
2419200
TTL
86400

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 3941664385 That means that all your nameservers are using the same data.

SOA MNAME 0/3

DANGER SOA (Start of Authority) record states that your master (primary) name server is: jobs-lab.org, but that server is not listed at the parent servers.

Serial value 1/1

SUCCESS SOA serial number is: 3941664385 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 : 28800 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 0/1

WARNING SOA Retry interval is : 14400 seconds. This seems too big;. (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 : 86400 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 jobs-lab.org
lookup jobs-lab.org at A.ROOT-SERVERS.NET(198.41.0.4) 25 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to d0.org.afilias-nst.org(199.19.57.1)
lookup jobs-lab.org at d0.org.afilias-nst.org(199.19.57.1) 13 ms
d0.org.afilias-nst.org(199.19.57.1) refer to wx20.wadax.ne.jp(unknow IP)
extra IP lookup for wx20.wadax.ne.jp at root server A.ROOT-SERVERS.NET(198.41.0.4)
lookup wx20.wadax.ne.jp at A.ROOT-SERVERS.NET(198.41.0.4) 24 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.dns.jp(203.119.1.1)
lookup wx20.wadax.ne.jp at a.dns.jp(203.119.1.1) 194 ms
a.dns.jp(203.119.1.1) refer to ns02.idc.jp(64.56.165.91)
lookup wx20.wadax.ne.jp at ns02.idc.jp(64.56.165.91) 220 ms
got A record 'wx20.wadax.ne.jp IN A 202.189.182.2' from wx20.wadax.ne.jp(64.56.165.91)
lookup jobs-lab.org at wx20.wadax.ne.jp(202.189.182.2) 226 ms
got A record 'jobs-lab.org IN A 202.189.182.2' from jobs-lab.org(202.189.182.2)
Total time: 702 ms