knipp.net DNS Report

Health Score: 74%

Need help fixing DNS ? Get an expert advise at support forum

Checked: 10 months before

Parent

NS records at parent servers

ns2.knipp.de
ns3.knipp.de
ns17.knipp.net [ 195.253.51.61 ]
[These were obtained from a.gtld-servers.net.]

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 (ns2.knipp.de,ns3.knipp.de) at nameserver 195.253.6.52
missing A record(s) for (ns2.knipp.de,ns3.knipp.de) at nameserver 194.64.105.66

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:
2a01:5b0:2:56::3d

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 5/5

SUCCESS You have 3 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
dnsmaster.knipp.de
Serial
2017112263
Refresh
86400
Retry
10800
Expire
864000
TTL
86400

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 2017112263 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: ns2.knipp.de That server is listed at the parent servers, which is correct.

Serial value 1/1

SUCCESS SOA serial number is: 2017112263 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 0/1

WARNING SOA Retry interval is : 86400 seconds. This seems too big;. (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 : 10800 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 : 864000 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 knipp.net
lookup knipp.net at A.ROOT-SERVERS.NET(198.41.0.4) 19 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.gtld-servers.net(192.5.6.30)
lookup knipp.net at a.gtld-servers.net(192.5.6.30) 10 ms
a.gtld-servers.net(192.5.6.30) refer to ns17.knipp.net(195.253.51.61)
lookup knipp.net at ns17.knipp.net(195.253.51.61) 80 ms
RECORD does not exist
Total time: 109 ms