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bd9aa06feb
As requested on the mailing list and in trac ticket #410, add an option to disable 'traditional' Diffie Hellman key exchange. People want to be able to create ecdh-only configurations. This patch also disables RSA key exchange by default for OpenSSL builds, to prevent that people who set "--dh none" but have an OpenSSL version that doesn't support ECDH end up with a less secure connection. Note that users that specify their own --tls-cipher override these defaults and thus can still use whatever OpenSSL supports (and might thus end up with less secure connections). PolarSSL does not allow to easily disable RSA key exchange during runtime, but its default compile options do not include RSA key exchange based cipher suites. Finally update the manpage to reflect the new behaviour, and while touching it change the text to motivate users towards a more secure configuration. v2 - disable RSA key exchange by default Signed-off-by: Steffan Karger <steffan@karger.me> Acked-by: Arne Schwabe <arne@rfc2549.org> Message-Id: <1420141569-11773-1-git-send-email-steffan@karger.me> URL: http://article.gmane.org/gmane.network.openvpn.devel/9376 Signed-off-by: Gert Doering <gert@greenie.muc.de> |
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| openvpn.8 | ||
| README.plugins | ||
OpenVPN Plugins
---------------
Starting with OpenVPN 2.0-beta17, compiled plugin modules are
supported on any *nix OS which includes libdl or on Windows.
One or more modules may be loaded into OpenVPN using
the --plugin directive, and each plugin module is capable of
intercepting any of the script callbacks which OpenVPN supports:
(1) up
(2) down
(3) route-up
(4) ipchange
(5) tls-verify
(6) auth-user-pass-verify
(7) client-connect
(8) client-disconnect
(9) learn-address
See the openvpn-plugin.h file in the top-level directory of the
OpenVPN source distribution for more detailed information
on the plugin interface.
Included Plugins
----------------
auth-pam -- Authenticate using PAM and a split privilege
execution model which functions even if
root privileges or the execution environment
have been altered with --user/--group/--chroot.
Tested on Linux only.
down-root -- Enable the running of down scripts with root privileges
even if --user/--group/--chroot have been used
to drop root privileges or change the execution
environment. Not applicable on Windows.
examples -- A simple example that demonstrates a portable
plugin, i.e. one which can be built for *nix
or Windows from the same source.
Building Plugins
----------------
cd to the top-level directory of a plugin, and use the
"make" command to build it. The examples plugin is
built using a build script, not a makefile.