Hi guys I've just installed OpenVPN-2.6.0-I003-amd64.msi on Microsoft Windows 11 (build 22621.1105).
The contents of a sample config file from my commercial VPN vendor/provider are as follows: client dev tun resolv-retry infinite nobind persist-key persist-tun verb 3 remote-cert-tls server ping 10 ping-restart 60 sndbuf 524288 rcvbuf 524288 cipher AES-256-CBC tls-cipher TLS-DHE-RSA-WITH-AES-256-GCM-SHA384:TLS-DHE-RSA-WITH-AES-256-CBC-SHA proto tcp4 pull-filter ignore "route-ipv6" pull-filter ignore "ifconfig-ipv6" auth-user-pass password.txt auth-nocache ca ca.crt service xyzopenvpn block-outside-dns remote 11.22.33.44 443 My computer was able to connect to the VPN vendor's server. According to the connection log, the data channel offload (ovpn-dco) was opened. However, I was unable to surf the internet. The error "Server Not Found" appeared in my Firefox browser. What I did next was to add the following line to the config file: --data-ciphers-fallback AES-256-CBC The contents of the config file have changed as follows: client dev tun resolv-retry infinite nobind persist-key persist-tun verb 3 remote-cert-tls server ping 10 ping-restart 60 sndbuf 524288 rcvbuf 524288 cipher AES-256-CBC --data-ciphers-fallback AES-256-CBC tls-cipher TLS-DHE-RSA-WITH-AES-256-GCM-SHA384:TLS-DHE-RSA-WITH-AES-256-CBC-SHA proto tcp4 pull-filter ignore "route-ipv6" pull-filter ignore "ifconfig-ipv6" auth-user-pass password.txt auth-nocache ca ca.crt service xyzopenvpn block-outside-dns remote 11.22.33.44 443 My computer is able to connect to the VPN provider's server. This time, however, ovpn-dco is disabled according to the first line in my connection log: Note: cipher 'AES-256-CBC' in --data-ciphers is not supported by ovpn-dco, disabling data channel offload. With ovpn-dco disabled, I can surf the internet and browse websites without issues. It appears that the kernel of Microsoft Windows 11 rejects and prevents ovpn-dco from working. What do you guys think? Best regards. Stella _______________________________________________ Openvpn-users mailing list Openvpn-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-users
