Sslv3 kerio connect install#
Sslv3 kerio connect full#

Install Intermediate Certificates (If Applicable).Import the Renewed Certificate in Kerio Connect.Note: Kerio Connect server certificate type is Apache based.įollow these steps for re-issuing SSL certificates: This article shares the process of re-issuing the SSL certificate to fix this issue. The default value, 1, allows Kerio Connect decide which cipher set to use regardless of the client preferences.At times, administrators may have issues renewing the SSL certificate using a new CRT file provided by the Certification Authority (CA).

Sslv3 kerio connect full#

Leave the variable empty to use a default cipher list.įor the full syntax of cipher lists, see the OpenSSL website. In this variable, you can change the client cipher list. Leave the variable empty to use a default set of SSL/TLS protocols: TLSv1,TLSv1.1įor example: SSLv3,TLSv1,TLSv1.1,TLSv1.2 ClientTlsCiphers In this variable, you can change the SSL/TLS protocols used when Kerio Connect acts as a client, for example, when sending messages via the SMTP protocol. To use a custom cipher list, type the cipher list in the variable.įor the full syntax of cipher lists, see the OpenSSL website. Leave the variable empty to use a default cipher list: AESGCM:HIGH:+EDH-RSA-DES-CBC3-SHA:+EDH-DSS-DES-CBC3-SHA:+DES-CBC3-SHA In this variable, you can change the cipher list used by Kerio Connect. To use a custom set of protocols, list the protocol names, separated by commas, in the variable.įor example: SSLv3,TLSv1,TLSv1.1,TLSv1.2 ServerTlsCiphers Leave the variable empty to use a default set of SSL/TLS protocols: TLSv1,TLSv1.1,TLSv1.2 In this variable, you can change the SSL/TLS protocols used by Kerio Connect. If you set the variable to 0, some older implementations of SSL may not connect to Kerio Connect servers. The default value, 1, disables the OpenSSL workaround for the CVE-2011-3389 vulnerability. ECDHE is more efficient than DHE and uses shorter keys. The server generates a random ephemeral public key for each session so that attackers cannot decipher past sessions. The default value, 1, enables ECDHE for key exchange. You can change the default value to 1024, 2048, or 4096 AllowEphemeralECDH Make sure the DisableEphemeralDH is enabled. The default value, 0, sets the size of DHE to 2048 (1024 for SMTP services). These ciphers are not recommended for compliance: Weak Ciphers

Here is a list of strong ciphers available: Strong ciphers (Recommended) It is recommended to use only strong ciphers suites to ensure compliance with various compliance standards.

Kerio Connect sets the default values of all the SSL/TLS variables.

Delete any variable in the Security or SmtpSecurity sections.

To reset the SSL/TLS configuration in the configuration file:

Change the settings in the Security or SmtpSecurity sections.

Open the configuration file mailserver.cfg for editing. For more information refer to Configuration files.

Kerio Connect uses different variables for the SSL/TLS protocols configuration. (You can test your server, for example, at Qualys SSLlabs test site). You might need to adjust the security settings when a flaw in a security protocol is found or to get a good security rating for your server.

SMTP services separately (for SMTP on port 25 and SMTPS on port 465).

Kerio Connect allows you to enable or disable specific security protocols and cipher sets manually for: