OpenVPN Connect is the commercial implementation of OpenVPN. OpenVPN Connect has a free version but this version is limited to two connections. It does require some configuring, but ultimately it has no cost for the user. The OpenVPN community project team is proud to release OpenVPN 2.5.7.

This is mostly a bugfix release, but adds limited support for OpenSSL 3.0. ChaCha20-Poly1305 cipher in the OpenVPN data channel (Requires OpenSSL 1.1.0 or newer).Improved TLS 1.3 support when using OpenSSL 1.1.1 or newer.Client-specific tls-crypt keys (-tls-crypt-v2).Improved Data channel cipher negotiation.Removal of BF-CBC support in default configuration (see below for possible incompatibilities).HMAC based auth-token support for seamless reconnects to standalone servers or a group of servers.Asynchronous (deferred) authentication support for auth-pam plugin.Asynchronous (deferred) support for client-connect scripts and plugins.Support IPv4 configs with /31 netmasks now.New option -block-ipv6 to reject all IPv6 packets (ICMPv6).Netlink integration (OpenVPN no longer needs to execute ifconfig/route or ip commands).Wintun driver support, a faster alternative to tap-windows6.Allow unicode search string in -cryptoapicert option.

EasyRSA3, a modern take on OpenVPN CA managementĬipher handling for the data channel cipher has been significantly changed between OpenVPN 2.3/2.4 and v2.5, most notably there are no 'default cipher BF-CBC' anymore because it is no longer considered a reasonable default.BF-CBC is still available, but it needs to be explicitly configured now.įor connections between OpenVPN 2.4 and v2.5 clients and servers, both ends will be able to negotiate a better cipher than BF-CBC. By default they will select one of the AES-GCM ciphers, but this can be influenced using the -data-ciphers setting.Ĭonnections between OpenVPN 2.3 and v2.5 that have no -cipher setting in the config (= defaulting to BF-CBC and not being negotiation-capable) must be updated. Unless BF-CBC is included in -data-ciphers or there is a '-cipher BF-CBC' in the OpenVPN 2.5 config, a v2.5 client or server will refuse to talk to a v2.3 server or client, because it has no common data channel cipher and negotiating a cipher is not possible.

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