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81
Total
70
DNS
90
Email
81
Security
50
Network
100
Availability
Domainirb.hr
IPv41
IPv60
MX records1
StatusActive
Domain technical report

Početna - Institut Ruđer Bošković

irb.hr

Institut je najveći hrvatski znanstveno-istraživački centar multidisciplinarnog karaktera

Generated: 2026-08-12T12:06:08-05:00 · Cached result

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IPv41
IPv60
MX1
NS3

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

3 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

45 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: five.netgencloud.com

i
IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
172.104.136.213

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
10 mail.irb.hr.

TXT

1 record(s)
"v=spf1 mx ip4:161.53.22.8 -all"

NS

3 record(s)
bjesomar.srce.hr.
atlas.irb.hr.
storm.irb.hr.

SOA

1 record(s)
atlas.irb.hr. postmaster.irb.hr. 2026052705 1200 3600 86400 8600

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 mx ip4:161.53.22.8 -all

DMARC

Configured
v=DMARC1; p=none; pct=100; rua=mailto:6bdad3f8@mxtoolbox.dmarc-report.com; ruf=mailto:6bdad3f8@forensics.dmarc-report.com; sp=none; aspf=r;

DKIM

Selector default
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDHvSxI+p2UPMr/05cC+Nx8BJL2lr3Jqb0NlkU0IIOXzp2sWGBGhfTZCDbJ7OeNinsc1SugoAL5zZQvKHxgOPt+ZlodNWLPvZr6L778FU2JmNqPn2bCJO9tW51l9YQectWyngv1fOBiDSkBYaZb7UflVLP/99S60tpK/bUAIqm51QIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Početna - Institut Ruđer Bošković
Description
Institut je najveći hrvatski znanstveno-istraživački centar multidisciplinarnog karaktera
Final URL
https://www.irb.hr/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.irb.hr/
Version
3
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
2016.websummercamp.com
Valid from
2026-06-29T10:55:50-05:00
Valid until
2026-09-27T10:55:49-05:00
Days remaining
45
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

4 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
—
X-Content-Type-OptionsNot detected
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
✓
Permissions PolicyImplemented
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
172.104.136.213
165,10 ms
Cloudflare
1.1.1.1
172.104.136.213
158,03 ms
Quad9
9.9.9.9
172.104.136.213
205,73 ms
OpenDNS
208.67.222.222
172.104.136.213
502,32 ms
AdGuard
94.140.14.14
172.104.136.213
196,41 ms

IP, geolocation and ASNAssociated network information

172.104.136.213

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.216.212
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

mail.irb.hr

Port 25: Closed/unreachable - 123.7 ms - 
Port 465: Closed/unreachable - 4146.7 ms - 
Port 587: Closed/unreachable - 123 ms - 220 mail.irb.hr Microsoft ESMTP MAIL Service ready at Wed, 12 Aug 2026 19:06:13 +0200

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