Thank you for the reply Client is Debian, Server is CentOS. Both running the latest version (all test environment) I've measured with speedtest-cli (just for the reference). Since it've been used in all cases, it should have a good representation of the issue. Changing fragments to 1400 or 0 (as well as mtu) improves/decrease the performance *somehow*. While i think that the problem is more generic. I'd expect improvement of x10 or x20 not +-1mbps.
What might be the problem here... On Mon, Dec 17, 2018 at 2:00 PM Jan Just Keijser <[email protected]> wrote: > On 17/12/18 12:48, Tamir Khason wrote: > > Currently it's UDP > But i've tried with TCP also. > > Which OS are client and server running? And which version of OpenVPN? > How are you measuring network performance? Iperf? Iperf3? > > Try playing with "--fragment" in UDP mode; don't change the MTU but add > fragment 1400 > mssfix > to both client and server configs, then decrease the fragment parameter to > see if that has any effect. > > HTH, > > JJK > > > On Mon, Dec 17, 2018 at 1:35 PM Giles Coochey <[email protected]> wrote: > >> >> On 17/12/2018 10:25, Tamir Khason wrote: >> > Hi, >> > Setup is following: >> > 1) VPS running OpenVPN server (default config) >> > Network performance from this server is 700-800 mbps to the "Known Host" >> > 2) Client running OpenVPN client (default config) >> > Network performance from this client to server 1 is 80-90 mbps >> > 3) Client performance to the "Known Host" without VPN is 70-80 mbps >> > When client is connecting to the "Known Host" via VPN it's >> > getting 8-10 mbps >> > >> > Tried following: >> > Played with snd/rcv buffers, removed encryption, played with mtu - >> > nothing, even if there is a speed increase, it's around 1mbps. >> > Tries another client (powerful pc) - same >> > Tried another server (not my config) - getting decent speed (cannot >> > validate it to exactly the same server, but the speed is decent). >> > >> > This brings me to the conclusion that the issue is somewhere in the >> > OpenVPN server. >> > >> > I would expect at least 50-60 from this client to the "Known Host" . >> > But this not happens. >> > Please, assist... I'm out of ideas >> > >> Is your OpenVPN set up using TCP or UDP? >> >> >> >> _______________________________________________ >> Openvpn-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/openvpn-users >> > > > > > _______________________________________________ > Openvpn-users mailing > [email protected]https://lists.sourceforge.net/lists/listinfo/openvpn-users > > >
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