Contribute to OpenVPN/openvpn development by creating an account on GitHub. NCP negotiation replaces worst cast crypto overhead with actual one in data channel frame. That frame params are used by mssfix. Fragment frame still contains worst case overhead. Because of that
OpenVPNで通信速度に影響する下記設定について検証。 ・udp or tcp ・comp-lzo の有無 ・tcp-nodelay の有無（tcpのみ） ・mssfix、fragment のチューニング mssfix … カプセル化されるTCPパケットのサイズ制限（デフォルト値：1450） fragment UDP… To set the MSS for OpenVPN, in your OpenVPN configuration file (the file originally sent ending in .ovpn), add the following configuration line (replacing 1420 with the appropriate value). mssfix 1420 Just setup a new Ubuntu box - got OpenVPN installed, simple iptables/masquerade setup. I can tell the server speed to where I am (China) is really snappy. Then the most bizarre thing happens. I connect to the OpenVPN server on my box with my mac (using Viscosity), everything works. Load the first webpage, loads in an instant (@ about 175k/sec). client dev tun proto udp remote ovpn-ext-vip1.srv.mst.edu 1194 remote ovpn-ext-vip2.srv.mst.edu 1194 remote ovpn-ext-vip1.srv.mst.edu 11941 remote ovpn-ext-vip2.srv
OpenVPNのスループットと最適化 - 1
Jul 22, 2020
Some recommend them to increase MTU on tunnel interface up to 48000, some say they should tune mssfix parameter, but none really helps. Sometimes people say that OpenVPN is so slow because it's userspace and this is its' usual speed. That's Nonsense! A little bit of history. It's July, 2004.
Jan 25, 2009 · # openvpn guttersnipe-TO-SW.ovpn Tue Jan 20 02:47:04 2009 OpenVPN 2.1_rc7 x86_64-pc-linux-gnu [SSL] [LZO2] [EPOLL] built on Jun 11 2008 Tue Jan 20 02:47:04 2009 IMPORTANT: OpenVPN's default port number is now 1194, based on an official port number assignment by IANA. OpenVPN 2.0-beta16 and earlier used 5000 as the default port. OpenVPNで通信速度に影響する下記設定について検証。 ・udp or tcp ・comp-lzo の有無 ・tcp-nodelay の有無（tcpのみ） ・mssfix、fragment のチューニング mssfix … カプセル化されるTCPパケットのサイズ制限（デフォルト値：1450） fragment UDP… To set the MSS for OpenVPN, in your OpenVPN configuration file (the file originally sent ending in .ovpn), add the following configuration line (replacing 1420 with the appropriate value). mssfix 1420