pgf.ferrous.com.br DNS Report

Health Score: 68%

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Checked: 4 days before

Parent

NS records at parent servers

lp1.ferrous.com.br [ 187.32.77.196 ]
lp2.ferrous.com.br [ 186.248.69.3 ]
[These were obtained from ns3.ferrous.com.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.
(lp1.ferrous.com.br.	3600	IN	A	187.32.77.196) present at Parent, missing at (187.32.77.196, 186.248.69.3)
(lp2.ferrous.com.br.	3600	IN	A	186.248.69.3) present at Parent, missing at (187.32.77.196, 186.248.69.3)

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 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 0/7

Lame nameservers:
187.32.77.196
186.248.69.3

Missing (stealth) nameservers 7/7

SUCCESS All your nameservers are also listed at the parent servers.

Root missing nameservers 0/7

DANGER There are nameservers not listed at your nameservers:
lp1.ferrous.com.br.
lp2.ferrous.com.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
Serial
Refresh
Retry
Expire
TTL

Serial agreement 7/7

SUCCESS All your nameservers agree that your SOA serial number is 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: , but that server is not listed at the parent servers.

Serial value 0/1

WARNING SOA serial number is: This not 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 : seconds. This seems too small. (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 : seconds. This seems too small. (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 : 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 0/1

WARNING SOA Expire time is : seconds. This seems too small. (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 pgf.ferrous.com.br
lookup pgf.ferrous.com.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 pgf.ferrous.com.br at a.dns.br(200.160.0.10) 111 ms
a.dns.br(200.160.0.10) refer to ns3.ferrous.com.br(187.32.77.211)
lookup pgf.ferrous.com.br at ns3.ferrous.com.br(187.32.77.211) 152 ms
ns3.ferrous.com.br(187.32.77.211) refer to lp2.ferrous.com.br(186.248.69.3)
lookup pgf.ferrous.com.br at lp2.ferrous.com.br(186.248.69.3) 144 ms
got A record 'pgf.ferrous.com.br IN A 187.32.77.210' from pgf.ferrous.com.br(186.248.69.3)
Total time: 417 ms