The --proto options changed a bit in OpenVPN v2.4. This tries to expand this section, explaining the new variants and how they related to older OpenVPN versions.
Signed-off-by: David Sommerseth <dav...@openvpn.net> --- doc/openvpn.8 | 37 ++++++++++++++++++++++++++++++++++--- 1 file changed, 34 insertions(+), 3 deletions(-) diff --git a/doc/openvpn.8 b/doc/openvpn.8 index a4189ac2..ca4c652e 100644 --- a/doc/openvpn.8 +++ b/doc/openvpn.8 @@ -413,10 +413,10 @@ Use protocol for communicating with remote host. .B p can be -.B udp, -.B tcp\-client, +.B udp, udp4, udp6 +.B tcp\-client, tcp4\-client, tcp6\-client, or -.B tcp\-server. +.B tcp\-server, tcp4\-server, tcp6\-server. The default protocol is .B udp @@ -445,6 +445,37 @@ option) and try again infinite or up to N retries (adjustable via the option). Both TCP client and server will simulate a SIGUSR1 restart signal if either side resets the connection. +When using just +.B udp +or +.B tcp +(not udp4/udp6/tcp4/tcp6) OpenVPN will deploy a dual-stack approach connecting +to remote hosts and binding to local interfaces. If a hostname resolves to +both an IPv4 and IPv6 address, OpenVPN will most commonly try to connect using +IPv6 first before trying the IPv4 address; this is decided by the operating +system's resolver. To enforce OpenVPN to only use either IPv4 or IPv6, the +.B udp4/tcp4 +and +.B udp6/tcp6 +variants needs to be used. + +A quick overview of what gives the most similar behaviour between OpenVPN 2.3 +and v2.4. + +.nf +.ft 3 +.in +4 +.B \ OpenVPN 2.3\ \ \ \ \ OpenVPN 2.4 +============================== + udp udp4 + udp6 udp + tcp-server tcp4-server + tcp6-server tcp-server + tcp-client tcp4-client + tcp6-client tcp-client +.in -4 +.fi + OpenVPN is designed to operate optimally over UDP, but TCP capability is provided for situations where UDP cannot be used. In comparison with UDP, TCP will usually be -- 2.13.5 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Openvpn-devel mailing list Openvpn-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-devel
