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Home » GFI User Forums » Kerio Connect » Not able to connect to "Greylisting: reputation server" after hardening (Hardening of Kerio Connect)
Not able to connect to "Greylisting: reputation server" after hardening [message #147403] Wed, 15 January 2020 08:08
Timmi is currently offline  Timmi
Messages: 15
Registered: August 2014
Hi Guys,

I hardened my Kerio Connect Server via the mailserver.cfg file.

Currently I don't experience any issue except that I'm not able to connect to the greylisting server (reputation-service.kerio.com).

[15/Jan/2020 07:00:10] Greylisting: reputation server 23.22.110.13 cannot establish secure connection: 430 Too many failed STARTTLS attempts.
[15/Jan/2020 07:00:10] Greylisting suspended for 17 minutes. While greylisting is suspended it is not applied to incoming messages.

These are the changes I have made:

<table name="Security">
<variable name="ServerTlsProtocols">TLSv1.2</variable>
  <variable name="ServerTlsCiphers">AESGCM:HIGH:+ECDHE-ECDSA-AES256-GCM-SHA384:+ECDHE-ECDSA-AES128-GCM-SHA256:+ECDHE-RSA-AES128-GCM-SHA256:!CAMELLIA128-SHA:+ECDH-ECDSA-AES256-GCM-SHA384:+ECDHE-RSA-AES256-GCM-SHA384:!CAMELLIA256-SHA:!DHE-RSA-CAMELLIA256-SHA:!AES256-GCM-SHA384:!AES128-GCM-SHA256:!ECDHE-RSA-AES256-SHA384:!ECDHE-RSA-AES128-SHA256:!DHE-RSA-AES256-SHA:!AES256-SHA256:!AES256-SHA:!ECDHE-RSA-AES128-SHA:!DHE-RSA-AES128-SHA256:!DHE-RSA-AES128-SHA:!DHE-RSA-CAMELLIA128-SHA:!AES128-SHA256:!AES128-SHA:!ECDHE-RSA-AES256-SHA:!DHE-RSA-AES256-SHA256</variable>
  <variable name="ClientTlsProtocols">TLSv1.2</variable>
  <variable name="ClientTlsCiphers">AESGCM:HIGH:+ECDHE-ECDSA-AES256-GCM-SHA384:+ECDHE-ECDSA-AES128-GCM-SHA256:+ECDHE-RSA-AES128-GCM-SHA256:!CAMELLIA128-SHA:+ECDH-ECDSA-AES256-GCM-SHA384:+ECDHE-RSA-AES256-GCM-SHA384:!CAMELLIA256-SHA:!DHE-RSA-CAMELLIA256-SHA:!AES256-GCM-SHA384:!AES128-GCM-SHA256:!ECDHE-RSA-AES256-SHA384:!ECDHE-RSA-AES128-SHA256:!DHE-RSA-AES256-SHA:!AES256-SHA256:!AES256-SHA:!ECDHE-RSA-AES128-SHA:!DHE-RSA-AES128-SHA256:!DHE-RSA-AES128-SHA:!DHE-RSA-CAMELLIA128-SHA:!AES128-SHA256:!AES128-SHA:!ECDHE-RSA-AES256-SHA:!DHE-RSA-AES256-SHA256</variable>

<table name="SmtpSecurity">
  <variable name="ServerTlsProtocols">TLSv1.2</variable>
  <variable name="ServerTlsCiphers">AESGCM:HIGH:+ECDHE-ECDSA-AES256-GCM-SHA384:+ECDHE-ECDSA-AES128-GCM-SHA256:+ECDHE-RSA-AES128-GCM-SHA256:!CAMELLIA128-SHA:+ECDH-ECDSA-AES256-GCM-SHA384:+ECDHE-RSA-AES256-GCM-SHA384:!CAMELLIA256-SHA:!DHE-RSA-CAMELLIA256-SHA:!AES256-GCM-SHA384:!AES128-GCM-SHA256:!ECDHE-RSA-AES256-SHA384:!ECDHE-RSA-AES128-SHA256:!DHE-RSA-AES256-SHA:!AES256-SHA256:!AES256-SHA:!ECDHE-RSA-AES128-SHA:!DHE-RSA-AES128-SHA256:!DHE-RSA-AES128-SHA:!DHE-RSA-CAMELLIA128-SHA:!AES128-SHA256:!AES128-SHA:!ECDHE-RSA-AES256-SHA:!DHE-RSA-AES256-SHA256</variable>

Any ideas?
Does this server only support insecure TLS versions and ciphers?

Kerio-Connect version 9.2.10

Best regards
Timmi

[Updated on: Wed, 15 January 2020 08:09]

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