Network stream drivers are a layer
between various parts of rsyslogd (e.g. the imtcp module) and the
transport layer. They provide sequenced delivery, authentication and
confidentiality to the upper layers. Drivers implement different
capabilities.
Users need to know about netstream drivers because
they need to configure the proper driver, and proper driver properties,
to achieve desired results (e.g. a TLS-protected syslog transmission).
The following drivers exist:
ptcp - the plain tcp network transport (no security)
gtls - a secure TLS transport implemented via the GnuTLS library
