SSL-Tools

SSL check results of hzsmsk.cz

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Discover if the mail servers for hzsmsk.cz can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

JSON Refresh

Report created Sat, 18 Jul 2020 20:33:52 +0000

No connection to the mailservers of hzsmsk.cz could be established.

Servers

Incoming Mails

These servers are responsible for incoming mails to @hzsmsk.cz addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
barrca.hzsmsk.cz
195.113.188.138
Results incomplete
10
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s
rs.cesnet.cz
2001:718:1:1::144:199
Results incomplete
200
supported
rs.cesnet.cz
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
rs.cesnet.cz
195.113.144.199
Results incomplete
200
supported
rs.cesnet.cz
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s

Outgoing Mails

We have not received any emails from a @hzsmsk.cz address so far. Test mail delivery

Certificates

First seen at:

CN=rs.cesnet.cz,O=CESNET,L=Praha,C=CZ

Certificate chain
Subject
Country (C)
  • CZ
Locality (L)
  • Praha
Organization (O)
  • CESNET
Common Name (CN)
  • rs.cesnet.cz
Alternative Names
  • rs.cesnet.cz
Issuer
Country (C)
  • NL
State (ST)
  • Noord-Holland
Locality (L)
  • Amsterdam
Organization (O)
  • TERENA
Common Name (CN)
  • TERENA SSL CA 3
validity period
Not valid before
2017-07-28
Not valid after
2020-08-05
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
EA:8F:7C:1C:41:3A:57:59:A5:D7:BC:EB:CA:96:0F:47:6C:A6:40:C4:10:9F:44:B2:2C:15:61:CB:F5:56:5F:B6
SHA1
F5:EA:35:1E:70:10:88:DE:30:ED:90:82:1A:C1:90:4A:3E:21:0F:1A
X509v3 extensions
authorityKeyIdentifier
  • keyid:67:FD:88:20:14:27:98:C7:09:D2:25:19:BB:E9:51:11:63:75:50:62
subjectKeyIdentifier
  • DB:B6:90:9A:33:C8:5E:A0:EC:CB:64:CD:05:CE:F3:AF:EB:9B:F6:F5
crlDistributionPoints
  • Full Name:
  • URI:http://crl3.digicert.com/TERENASSLCA3.crl
  • Full Name:
  • URI:http://crl4.digicert.com/TERENASSLCA3.crl
certificatePolicies
  • Policy: 2.16.840.1.114412.1.1
  • CPS: https://www.digicert.com/CPS
  • Policy: 2.23.140.1.2.2
authorityInfoAccess
  • OCSP - URI:http://ocsp.digicert.com
  • CA Issuers - URI:http://cacerts.digicert.com/TERENASSLCA3.crt

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.rs.cesnet.cz
  • DANE-TA: Trust Anchor Assertion
  • Use full certificate
  • SHA-256 Hash
valid
—
_25._tcp.rs.cesnet.cz
  • DANE-TA: Trust Anchor Assertion
  • Use full certificate
  • SHA-256 Hash
valid
valid