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18.6.3. Enabling Encrypted Transport

Confidentiality and integrity in network transmissions can be provided by either the TLS or GSSAPI encryption protocol.
Transport Layer Security (TLS) is a cryptographic protocol designed to provide communication security over the network. When using TLS, rsyslog messages are encrypted before sending, and mutual authentication exists between the sender and receiver.
Generic Security Service API (GSSAPI) is an application programming interface for programs to access security services. To use it in connection with rsyslog you must have a functioning Kerberos environment.