iperf.scottlinux.com

Public iperf server available over IPv4 and IPv6

iperf3 only

Good for short, quick tests only!!

iperf3

To test with iperf3, here are some example commands.

TCP test:
$ iperf3 -c iperf.scottlinux.com
UDP test:
$ iperf3 -c iperf.scottlinux.com -u
Specify IPv4 or IPv6:
$ iperf3 -4 -c iperf.scottlinux.com
$ iperf3 -6 -c iperf.scottlinux.com

FAQ

Where is this server located?

Fremont, CA USA in an he.net dataceter. It's running on Linode!

What versions of iperf?

iperf 3.2 on ports 5201 tcp and udp

How fast is the connection?

40Gbps inbound (1Gbps real world), 1Gbps outbound. Actual speeds one will see across the internet from this server will vary widely.

How many connections can I make at once?

This server will only allow one iperf connection at a time.


Examples

From Digital Ocean San Francisco ($5 instance):

$ iperf3 -c iperf.scottlinux.com
Connecting to host iperf.scottlinux.com, port 5201
[  4] local 104.131.144.67 port 37682 connected to 173.230.156.66 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec   103 MBytes   862 Mbits/sec    2    563 KBytes       
[  4]   1.00-2.00   sec   113 MBytes   947 Mbits/sec    1    578 KBytes       
[  4]   2.00-3.00   sec   111 MBytes   931 Mbits/sec    0    594 KBytes       
[  4]   3.00-4.00   sec   112 MBytes   938 Mbits/sec    0    609 KBytes       
[  4]   4.00-5.00   sec   112 MBytes   943 Mbits/sec    1    624 KBytes       
[  4]   5.00-6.00   sec   111 MBytes   933 Mbits/sec    0    638 KBytes       
[  4]   6.00-7.00   sec   112 MBytes   944 Mbits/sec    0    652 KBytes       
[  4]   7.00-8.00   sec   111 MBytes   933 Mbits/sec    1    666 KBytes       
[  4]   8.00-9.00   sec   111 MBytes   933 Mbits/sec    1    677 KBytes       
[  4]   9.00-10.00  sec   112 MBytes   944 Mbits/sec    0    691 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  1.08 GBytes   931 Mbits/sec    6             sender
[  4]   0.00-10.00  sec  1.08 GBytes   928 Mbits/sec                  receiver

iperf Done.


From AWS us-east-1 (m3.large instance):

$ iperf3 -c iperf.scottlinux.com
Connecting to host iperf.scottlinux.com, port 5201
[  4] local 10.9.180.16 port 59405 connected to 173.230.156.66 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  15.7 MBytes   132 Mbits/sec    0   2.36 MBytes       
[  4]   1.00-2.00   sec  27.5 MBytes   231 Mbits/sec  143   1.87 MBytes       
[  4]   2.00-3.00   sec  28.8 MBytes   241 Mbits/sec    0   2.03 MBytes       
[  4]   3.00-4.00   sec  30.0 MBytes   252 Mbits/sec    0   2.15 MBytes       
[  4]   4.00-5.00   sec  32.5 MBytes   273 Mbits/sec    1   2.24 MBytes       
[  4]   5.00-6.00   sec  32.5 MBytes   273 Mbits/sec    0   2.24 MBytes       
[  4]   6.00-7.00   sec  33.8 MBytes   283 Mbits/sec    0   2.25 MBytes       
[  4]   7.00-8.00   sec  31.2 MBytes   262 Mbits/sec    0   2.26 MBytes       
[  4]   8.00-9.00   sec  33.8 MBytes   283 Mbits/sec    1   2.27 MBytes       
[  4]   9.00-10.00  sec  33.8 MBytes   283 Mbits/sec    1   2.27 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec   299 MBytes   251 Mbits/sec  146             sender
[  4]   0.00-10.00  sec   299 MBytes   251 Mbits/sec                  receiver

iperf Done.


Google Compute, us-central1-b

$ iperf3 -c iperf.scottlinux.com
Connecting to host iperf.scottlinux.com, port 5201
[  4] local 10.128.0.2 port 55874 connected to 173.230.156.66 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  23.3 MBytes   195 Mbits/sec  2736   2.01 MBytes       
[  4]   1.00-2.00   sec  28.8 MBytes   241 Mbits/sec  735   1.49 MBytes       
[  4]   2.00-3.00   sec  31.2 MBytes   262 Mbits/sec    0   1.57 MBytes       
[  4]   3.00-4.00   sec  33.8 MBytes   283 Mbits/sec    0   1.63 MBytes       
[  4]   4.00-5.00   sec  32.5 MBytes   273 Mbits/sec    0   1.67 MBytes       
[  4]   5.00-6.00   sec  35.0 MBytes   294 Mbits/sec    0   1.69 MBytes       
[  4]   6.00-7.00   sec  35.0 MBytes   294 Mbits/sec    0   1.70 MBytes       
[  4]   7.00-8.00   sec  35.0 MBytes   294 Mbits/sec    0   1.71 MBytes       
[  4]   8.00-9.00   sec  35.0 MBytes   294 Mbits/sec    0   1.71 MBytes       
[  4]   9.00-10.00  sec  36.2 MBytes   304 Mbits/sec    0   1.71 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec   326 MBytes   273 Mbits/sec  3471             sender
[  4]   0.00-10.00  sec   324 MBytes   272 Mbits/sec                  receiver

iperf Done.


Locally! :)

$ iperf3 -c iperf.scottlinux.com
Connecting to host iperf.scottlinux.com, port 5201
[  4] local 2600:3c01::f03c:91ff:fe6e:5a91 port 47647 connected to 2600:3c01::f03c:91ff:fe6e:5a91 port 5201
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  2.82 GBytes  24.2 Gbits/sec    0   1.37 MBytes       
[  4]   1.00-2.00   sec  2.79 GBytes  23.9 Gbits/sec    0   1.50 MBytes       
[  4]   2.00-3.00   sec  2.80 GBytes  24.0 Gbits/sec    0   1.56 MBytes       
[  4]   3.00-4.00   sec  2.82 GBytes  24.3 Gbits/sec    0   1.69 MBytes       
[  4]   4.00-5.00   sec  2.75 GBytes  23.6 Gbits/sec    0   1.75 MBytes       
[  4]   5.00-6.00   sec  2.78 GBytes  23.9 Gbits/sec    1   1.75 MBytes       
[  4]   6.00-7.00   sec  2.54 GBytes  21.8 Gbits/sec    0   2.19 MBytes       
[  4]   7.00-8.00   sec  2.81 GBytes  24.2 Gbits/sec    0   2.19 MBytes       
[  4]   8.00-9.00   sec  2.77 GBytes  23.8 Gbits/sec    0   2.31 MBytes       
[  4]   9.00-10.00  sec  2.79 GBytes  23.9 Gbits/sec    0   2.37 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-10.00  sec  27.7 GBytes  23.8 Gbits/sec    1             sender
[  4]   0.00-10.00  sec  27.7 GBytes  23.8 Gbits/sec                  receiver

iperf Done.

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