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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><title>gtls Network Stream Driver</title>
</head>
<body>
<h1>gtls Network Stream Driver</h1>
<p>This <a href="netstream.html">network stream
driver</a> implements a TLS protected transport via the <a href="http://www.gnu.org/software/gnutls/" target="_blank">GnuTLS
library</a>.</p>
<p style="font-weight: bold;">Supported Driver Modes</p>
<ul>
<li>0 - unencrypted trasmission (just like <a href="ns_ptcp.html">ptcp</a> driver)</li>
<li>1 - TLS-protected operation</li>
</ul>
Note: mode 0 does not provide any benefit over the ptcp driver. This
mode exists for technical reasons, but should not be used. It may be
removed in the future.<br>
<span style="font-weight: bold;">Supported Authentication
Modes</span><br>
<ul>
<li><span style="font-weight: bold;">anon</span>
- anonymous authentication as
described in IETF's draft-ietf-syslog-transport-tls-12 Internet draft</li>
<li><span style="font-weight: bold;">x509/fingerprint</span>
- certificate fingerprint authentication as
described in IETF's draft-ietf-syslog-transport-tls-12 Internet draft</li>
<li><span style="font-weight: bold;">x509/name</span>
- certificate validation and subject name authentication as
described in IETF's draft-ietf-syslog-transport-tls-12 Internet draft
[NOT YET IMPLEMENTED]</li>
</ul>
Note: "anon" does not permit to authenticate the remote peer. As such,
this mode is vulnerable to man in the middle attacks as well as
unauthorized access. It is recommended NOT to use this mode.<br>
<br>
<b>Known Problems</b><br>
<p>Even in x509/fingerprint mode, both the client and sever
certificate currently must be signed by the same root CA. This is an
artifact of the underlying GnuTLS library and the way we use it. It is
expected that we can resolve this issue in the future.</p>
<p>[<a href="rsyslog_conf.html">rsyslog.conf overview</a>]
[<a href="manual.html">manual index</a>] [<a href="http://www.rsyslog.com/">rsyslog site</a>]
</p>
<p><font size="2">This documentation is part of the
<a href="http://www.rsyslog.com/">rsyslog</a>
project.<br>
Copyright © 2008 by <a href="http://www.gerhards.net/rainer">Rainer
Gerhards</a> and
<a href="http://www.adiscon.com/">Adiscon</a>.
Released under the GNU GPL version 3 or higher.</font></p>
</body></html>
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