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3.6. Using stunnel

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The stunnel program is an encryption wrapper between a client and a server. It listens on the port specified in its configuration file, encrypts the communication with the client, and forwards the data to the original daemon listening on its usual port. This way, you can secure any service that itself does not support any type of encryption, or improve the security of a service that uses a type of encryption that you want to avoid for security reasons, such as SSL versions 2 and 3, affected by the POODLE SSL vulnerability (CVE-2014-3566). See Resolution for POODLE SSLv3.0 vulnerability (CVE-2014-3566) for components that do not allow SSLv3 to be disabled via configuration settings. OpenLDAP older than 2.4.39 (before Red Hat Enterprise Linux 6.6) and CUPS are examples of components that do not provide a way to disable SSL in their own configuration.

3.6.1. Installing stunnel

Install the stunnel package by running the following command as root:
~]# yum install stunnel
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