Hi, Just to be sure, you also checked your internet connection - at home or wherever you were at the time? Best Mara Am 7. Juli 2021 17:41:17 MESZ schrieb "Clément Péron" <peron.clem@xxxxxxxxx>: >Hi, > >I was trying to have a SSH tunnel with at least 150Mbps/s in both >directions. > >I have a laptop computer under Ubuntu 20.04.2 and a remote server also >under Ubuntu 20.04.2. > >I measured the speed of my internet connection with Iperf3 and without >SSH Tunnel it is OK. >$> iperf3 -c <SERVER_IP> -p 7503 >- 500 Mbits/sec laptop -> server >$> iperf3 -c <SERVER_IP> -p 7503 -R >- 927 Mbits/sec laptop <- server > >Then I open a SSH Tunnel: laptop -> server >$> ssh -L 7503:127.0.0.1:7503 root@my_server > >Doing the iperf3 test again >$> iperf3 -c 127.0.0.1 -p 7503 >- 13.6 Mbits/sec >$> iperf3 -c 127.0.0.1 -p 7503 -R >- 672 Mbits/sec > >And now the speed is terrible from my laptop to the server. > >In the iperf console this looks like this >[ ID] Interval Transfer Bitrate Retr Cwnd >[ 5] 0.00-1.00 sec 11.2 MBytes 94.3 Mbits/sec 2 1023 KBytes >[ 5] 1.00-2.00 sec 0.00 Bytes 0.00 bits/sec 1 639 KBytes >[ 5] 2.00-3.00 sec 1.25 MBytes 10.5 Mbits/sec 0 639 KBytes >[ 5] 3.00-4.00 sec 0.00 Bytes 0.00 bits/sec 0 639 KBytes >[ 5] 4.00-5.00 sec 1.25 MBytes 10.5 Mbits/sec 0 639 KBytes >[ 5] 5.00-6.00 sec 0.00 Bytes 0.00 bits/sec 0 639 KBytes >[ 5] 6.00-7.00 sec 1.25 MBytes 10.5 Mbits/sec 0 639 KBytes >[ 5] 7.00-8.00 sec 0.00 Bytes 0.00 bits/sec 0 639 KBytes >[ 5] 8.00-9.00 sec 0.00 Bytes 0.00 bits/sec 0 639 KBytes >[ 5] 9.00-10.00 sec 1.25 MBytes 10.5 Mbits/sec 0 639 KBytes > >During some seconds there is no Bitrate at all :(. > >I understand that the SSH tunnel will add some overhead and I will >lose around 10/20% of Bandwidth but this looks like a huge drop. > >Do you have any idea what can create this behavior? > >Thanks for your help, >Clement >_______________________________________________ >openssh-unix-dev mailing list >openssh-unix-dev@xxxxxxxxxxx >https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev -- Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet. _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
