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#1 2018-12-18 19:38:27

graysky
Wiki Maintainer
From: :wq
Registered: 2008-12-01
Posts: 10,636
Website

iperf3 to use a pair wireguard interfaces on a LAN [SOLVED]

I want to get iperf3 to benchmark a simple wireguard setup on my LAN.  I have two machines, foo is 192.168.1.228 and bar is 192.168.1.112.

These IP addresses are fully functional on their respective eth0 interfaces.  Each one also has a wg0 interface configured as shown below.  I can get iperf3 to work over the non-wireguard interfaces, but not over the wireguard interfaces.  Am I using iperf3 wrong?  Did I misconfigure wg?

Details
Here are the /etc/wireguard/wg0.conf files for both machines (I don't care if the public/private keys are present/this is only a test environment and it will allow others to simply copy/paste if they want to test as well):

On foo:

[Interface]
Address = 10.0.9.15/24
SaveConfig = true
ListenPort = 500
PrivateKey = kLac+M+JJJ+gpsKo1DeUyfuwfDwGeKMj81+M3Z3mUkw=

[Peer]
PublicKey = y6DrsFVIgqBMc8joSuEytCpQEywk5dPKRoeLZZC9H34=
AllowedIPs = 10.0.9.16/32

On bar:

[Interface]
Address = 10.0.9.16/24
SaveConfig = true
ListenPort = 500
FwMark = 0xca6c
PrivateKey = 4EwMqSyvLaHrv5JvAAyKnmdbw9UN4rsjydkPXb5ll28=

[Peer]
PublicKey = SkBs9t96znOr+d60tgPlXkp7z6YABvfxD9KNVzZIP3I=
AllowedIPs = 0.0.0.0/0
Endpoint = 192.168.1.228:500

Again, both wireguard interfaces are up and connected.  For example, on foo:

# wg
interface: wg0
  public key: SkBs9t96znOr+d60tgPlXkp7z6YABvfxD9KNVzZIP3I=
  private key: (hidden)
  listening port: 500

peer: y6DrsFVIgqBMc8joSuEytCpQEywk5dPKRoeLZZC9H34=
  endpoint: 192.168.1.112:500
  allowed ips: 10.0.9.16/32
  latest handshake: 10 minutes, 41 seconds ago
  transfer: 32.45 KiB received, 8.24 KiB sent

If I run iperf3 in server mode on foo and in client mode on bar, it works as expected using the non-wireguard interfaces:

On foo:

% iperf3 -s -B 192.168.1.228
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.112, port 58575
[  5] local 192.168.1.228 port 5201 connected to 192.168.1.112 port 46261
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   107 MBytes   900 Mbits/sec
[  5]   1.00-2.00   sec   112 MBytes   939 Mbits/sec
[  5]   2.00-3.00   sec   112 MBytes   940 Mbits/sec
[  5]   3.00-4.00   sec   112 MBytes   938 Mbits/sec
[  5]   4.00-5.00   sec   112 MBytes   940 Mbits/sec
[  5]   4.00-5.00   sec   112 MBytes   940 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-5.00   sec   596 MBytes  1.00 Gbits/sec                  receiver
iperf3: the client has terminated

On bar:

% iperf3 -c 192.168.1.228 -B 192.168.1.112
Connecting to host 192.168.1.228, port 5201
[  5] local 192.168.1.112 port 46261 connected to 192.168.1.228 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   113 MBytes   950 Mbits/sec    0    281 KBytes
[  5]   1.00-2.00   sec   112 MBytes   939 Mbits/sec    0    296 KBytes
[  5]   2.00-3.00   sec   112 MBytes   938 Mbits/sec    0    296 KBytes
[  5]   3.00-4.00   sec   112 MBytes   938 Mbits/sec    0    296 KBytes
[  5]   4.00-5.00   sec   112 MBytes   944 Mbits/sec    0    308 KBytes
^C[  5]   5.00-5.33   sec  36.7 MBytes   939 Mbits/sec    0    308 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-5.33   sec   598 MBytes   942 Mbits/sec    0             sender
[  5]   0.00-5.33   sec  0.00 Bytes  0.00 bits/sec                  receiver
iperf3: interrupt - the client has terminated

When I try using the IP addresses of the respective wireguard interfaces, I get nothing:

On foo:

% iperf3 -s -B 10.0.9.15
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

On bar:

% iperf3 -c 10.0.9.15 -B 10.0.9.16
iperf3: error - unable to connect to server: Connection timed out

Last edited by graysky (2018-12-18 22:49:53)

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#2 2018-12-18 22:51:53

graysky
Wiki Maintainer
From: :wq
Registered: 2008-12-01
Posts: 10,636
Website

Re: iperf3 to use a pair wireguard interfaces on a LAN [SOLVED]

Solved... for others, opening 500/udp was insufficient, had to open more.  Also, iperf3 listens on all ports by default, no need to mess with -B switch.

On foo:

% iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 10.0.9.16, port 54812
[  5] local 10.0.9.15 port 5201 connected to 10.0.9.16 port 54814
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   102 MBytes   854 Mbits/sec
[  5]   1.00-2.00   sec  98.1 MBytes   823 Mbits/sec
[  5]   2.00-3.00   sec   107 MBytes   901 Mbits/sec
[  5]   3.00-4.00   sec   107 MBytes   894 Mbits/sec
[  5]   4.00-5.00   sec   104 MBytes   870 Mbits/sec
[  5]   5.00-6.00   sec   101 MBytes   848 Mbits/sec
[  5]   6.00-7.00   sec   107 MBytes   899 Mbits/sec
[  5]   7.00-8.00   sec   107 MBytes   901 Mbits/sec
[  5]   8.00-9.00   sec   107 MBytes   901 Mbits/sec
[  5]   9.00-10.00  sec  98.1 MBytes   823 Mbits/sec
[  5]  10.00-10.04  sec  4.50 MBytes   901 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.04  sec  1.02 GBytes   872 Mbits/sec                  receiver

On bar:

% iperf3 -c 10.0.9.15
Connecting to host 10.0.9.15, port 5201
[  5] local 10.0.9.16 port 54814 connected to 10.0.9.15 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   107 MBytes   898 Mbits/sec    0    361 KBytes
[  5]   1.00-2.00   sec  98.0 MBytes   822 Mbits/sec    0    361 KBytes
[  5]   2.00-3.00   sec   107 MBytes   901 Mbits/sec    0    361 KBytes
[  5]   3.00-4.00   sec   107 MBytes   898 Mbits/sec    0    442 KBytes
[  5]   4.00-5.00   sec   100 MBytes   840 Mbits/sec    0    465 KBytes
[  5]   5.00-6.00   sec   105 MBytes   880 Mbits/sec    0    488 KBytes
[  5]   6.00-7.00   sec   107 MBytes   897 Mbits/sec    0    513 KBytes
[  5]   7.00-8.00   sec   107 MBytes   900 Mbits/sec    0    513 KBytes
[  5]   8.00-9.00   sec   107 MBytes   901 Mbits/sec    0    513 KBytes
[  5]   9.00-10.00  sec  98.2 MBytes   823 Mbits/sec    0    513 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.02 GBytes   876 Mbits/sec    0             sender
[  5]   0.00-10.04  sec  1.02 GBytes   872 Mbits/sec                  receiver

iperf Done.

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