SSL-Tools

SSL check results of api1.investika.cz

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Discover if the mail servers for api1.investika.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

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Report created Tue, 16 Apr 2024 11:03:49 +0000

We can not guarantee a secure connection to the mailservers of api1.investika.cz!

Please contact the operator of api1.investika.cz and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/api1.investika.cz

Servers

Incoming Mails

These servers are responsible for incoming mails to @api1.investika.cz addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mx1.nux.cz
80.95.253.68
 10
supported
*.nux.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
9 s
mx2.nux.cz
89.233.139.110
 20
supported
*.nux.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
9 s
mx3.nux.cz
149.56.46.205
Results incomplete
30
unsupported
not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s

Outgoing Mails

We have not received any emails from a @api1.investika.cz address so far. Test mail delivery

Certificates

First seen at:

CN=*.nux.cz,O=nux.cz,OU=Proxmox Mail Gateway

Certificate chain
  • *.nux.cz (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Organizational Unit (OU)
  • Proxmox Mail Gateway
Organization (O)
  • nux.cz
Common Name (CN)
  • *.nux.cz
Issuer

Certificate is self-signed.

validity period
Not valid before
2021-10-14
Not valid after
2031-10-12
Fingerprints
SHA256
30:6B:BE:55:77:A8:0F:DC:14:A0:62:DD:91:E7:8D:89:A5:17:5F:5E:AD:19:04:91:D0:04:93:05:F3:30:00:9C
SHA1
E5:4E:C2:13:07:7B:A1:AB:30:5B:FA:01:47:FF:BD:78:C2:75:21:6E
First seen at:

CN=*.nux.cz,O=nux.cz,OU=Proxmox Mail Gateway

Certificate chain
  • *.nux.cz (Certificate is self-signed.)
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Organizational Unit (OU)
  • Proxmox Mail Gateway
Organization (O)
  • nux.cz
Common Name (CN)
  • *.nux.cz
Issuer

Certificate is self-signed.

validity period
Not valid before
2021-10-14
Not valid after
2031-10-12
Fingerprints
SHA256
23:A7:5C:73:0B:FA:A6:1D:3E:9B:73:B3:DE:2F:CC:AE:5B:44:25:5F:C7:C1:76:60:11:35:F2:BB:B0:8F:C5:C4
SHA1
F0:47:5E:95:2E:5C:DF:D3:AC:E0:CE:7B:B2:82:47:29:3A:DB:DD:8F