mp.ac.gov.br DNS Report

Health Score: 63%

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Checked: 5 days before

Parent

NS records at parent servers

mpns1.ac.gov.br [ 201.72.98.2 ]
mpns2.ac.gov.br [ 201.72.98.6 ]
[These were obtained from ns1.ac.gov.br.]

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.
(mpns1.ac.gov.br.		21600	IN	A	201.72.98.2) present at Parent, missing at (201.72.98.6)
(mpns2.ac.gov.br.		21600	IN	A	201.72.98.6) present at Parent, missing at (201.72.98.6)
(ns1.mpac.mp.br.		3600	IN	A	201.72.98.2) present at (201.72.98.6), missing at Parent
(ns2.mpac.mp.br.		3600	IN	A	201.72.98.6) present at (201.72.98.6), missing at Parent

Nameservers A records 7/7

SUCCESS Nameservers do include corresponding A records when asked for your NS records. This ensures that your DNS servers know the A records corresponding to all your NS records.

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:
201.72.98.2

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:
ns2.mpac.mp.br.
ns1.mpac.mp.br.

Root missing nameservers 0/7

DANGER There are nameservers not listed at your nameservers:
mpns1.ac.gov.br.
mpns2.ac.gov.br.

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
root.sede.ac.gov.br
Serial
2018071802
Refresh
4000
Retry
240
Expire
1500000
TTL
3600

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 2018071802 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: sede.mp.ac.gov.br, but that server is not listed at the parent servers.

Serial value 1/1

SUCCESS SOA serial number is: 2018071802 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 : 4000 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 : 240 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 : 1500000 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 : 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 mp.ac.gov.br
lookup mp.ac.gov.br at A.ROOT-SERVERS.NET(198.41.0.4) 10 ms
A.ROOT-SERVERS.NET(198.41.0.4) refer to a.dns.br(200.160.0.10)
lookup mp.ac.gov.br at a.dns.br(200.160.0.10) 111 ms
a.dns.br(200.160.0.10) refer to ns1.ac.gov.br(179.252.114.130)
lookup mp.ac.gov.br at ns1.ac.gov.br(179.252.114.130) 198 ms
ns1.ac.gov.br(179.252.114.130) refer to mpns2.ac.gov.br(201.72.98.6)
lookup mp.ac.gov.br at mpns2.ac.gov.br(201.72.98.6) 172 ms
got A record 'mp.ac.gov.br IN A 201.72.98.13' from mp.ac.gov.br(201.72.98.6)
Total time: 491 ms