I am helpless and look for advice.
I have a setup with two freebsd boxes. BOX (A) is the OpenVPN Server, BOX (B) the OpenVPN Client. Behind BOX A are two Windows 2019 Server. Behind BOX B are Centos 8 server. Centos & Windows should exchange data through OpenVPN.
Both BOX have a Xeon E3-1230 v3 @ 3.30GHz and enabled HW crypto but i assumes its not used.
Bandwith betwen both boxes is a symetrical 1Gbit/s connection through public internet.
Lines are professional, not end user with filtering or traffic shaping.
Everything works and iperf confirmed the connection speed without OpenVPN.
But there is unexepected low bandwidth in one direction.
Server -> Client 250 - 270Mbits .. which is kind of what i expected.
Client -> Server 17,7Mbits. I am that precise because that is how iperf looks:
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Connecting to host 192.168.1.240, port 5201
[ 4] local 172.16.220.70 port 37189 connected to 192.168.1.240 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 30.4 MBytes 255 Mbits/sec
[ 4] 1.00-2.00 sec 31.2 MBytes 262 Mbits/sec
[ 4] 2.00-3.00 sec 31.8 MBytes 266 Mbits/sec
[ 4] 3.00-4.00 sec 31.5 MBytes 264 Mbits/sec
[ 4] 4.00-5.00 sec 31.8 MBytes 266 Mbits/sec
(...)
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Connecting to host 172.16.220.70, port 5201
[ 5] local 192.168.1.240 port 55676 connected to 172.16.220.70 port 5201
[ ID] Interval Transfer Bandwidth
[ 5] 0.00-1.00 sec 3.68 MBytes 30.8 Mbits/sec
[ 5] 1.00-2.00 sec 1.64 MBytes 13.8 Mbits/sec
[ 5] 2.00-3.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 3.00-4.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 4.00-5.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 5.00-6.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 6.00-7.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 7.00-8.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 8.00-9.00 sec 2.11 MBytes 17.7 Mbits/sec
[ 5] 9.00-10.00 sec 2.11 MBytes 17.7 Mbits/sec
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[ 5] local 192.168.1.240 port 48692 connected to 172.16.220.70 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 3.71 MBytes 31.1 Mbits/sec
[ 5] 1.00-2.00 sec 1.76 MBytes 14.8 Mbits/sec
[ 5] 2.00-3.00 sec 2.29 MBytes 19.2 Mbits/sec
[ 5] 3.00-4.00 sec 1.58 MBytes 13.3 Mbits/sec
[ 5] 4.00-5.00 sec 1.58 MBytes 13.3 Mbits/sec
[ 5] 5.00-6.00 sec 1.58 MBytes 13.3 Mbits/sec
[ 5] 6.00-7.00 sec 1.41 MBytes 11.8 Mbits/sec
[ 5] 7.00-8.00 sec 1.41 MBytes 11.8 Mbits/sec
[ 5] 8.00-9.00 sec 1.58 MBytes 13.3 Mbits/sec
[ 5] 9.00-10.00 sec 1.23 MBytes 10.3 Mbits/sec
I dont get it. Did i miss something obvious?
Any suggestions?
Thanks alot!