On 17/12/18 13:26, Tamir Khason wrote:
That's exactly what i would expect to.
I've checked the performance between client and server inside and outside.
The way of testing:
Outside of channel
speedtest-cli client on the client side, speetest server installed on
VPN server
Inside the channel is not possible to test with speedtest, as you can
understand :)
As you can see from the email, outside the channel i am getting 80-90
mbps
that's why I'd like to see an iperf test inside and outside the tunnel:
- on the server side, install and run iperf
yum install iperf
iperf -s -l 1M
- on the client side, run iperf also
iperf -c <server-IP> -l 1M
iperf -c <tun-IP> -l 1M
then reverse the 'iperf -s' and 'iperf -c' statements and rerun.
It's the *upload* speed of the VPN tunnel that I am most interested in
in this case.
HTH,
JJK
On Mon, Dec 17, 2018 at 2:12 PM Jan Just Keijser <[email protected]
<mailto:[email protected]>> wrote:
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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