Hi,
On 17/12/18 13:04, Tamir Khason wrote:
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...
it could be many things - esp as you are testing network performance in
one direction only.
I'd recommend to run an iperf test between the OpenVPN client and
server, both inside and outside the tunnel. That is the most "basic"
number you can tweak. How fast your OpenVPN server can route traffic
from "known host 1" to your VPN client is secondary to that.
With Unix/Linux clients and servers you can achieve nearly 90% of
linespeed , with a limit of ~200 Mbps without any special tweaks.
HTH,
JJK
On Mon, Dec 17, 2018 at 2:00 PM Jan Just Keijser <[email protected]
<mailto:[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]
<mailto:[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?
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