copy iperf3 to /usr/bin
copy libssl.so.1.0.0 /usr/local/lib
copy libcrypto.so.1.0.0 /usr/local/lib
make iperf3 exe with chmod 755

If doesn't work let me know

ash-4.4# ./iperf3 -v
iperf 3.10.1 (cJSON 1.7.13)
Linux NAS 4.4.180+ #41890 SMP Fri Jun 25 02:42:35 CST 2021 x86_64
Optional features available: CPU affinity setting, IPv6 flow label, TCP congestion algorithm setting, sendfile / zerocopy, socket pacing, authentication, bind to device, support IPv4 don't fragment
ash-4.4# 

ash-4.4# ./iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.10.9, port 16310
[  5] local 192.168.10.10 port 5201 connected to 192.168.10.9 port 16311
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   148 MBytes  1.24 Gbits/sec                  
[  5]   1.00-2.00   sec   283 MBytes  2.37 Gbits/sec                  
[  5]   2.00-3.00   sec   283 MBytes  2.37 Gbits/sec                  
[  5]   3.00-4.00   sec   283 MBytes  2.37 Gbits/sec                  
[  5]   4.00-5.00   sec   282 MBytes  2.36 Gbits/sec                  
[  5]   5.00-6.00   sec   283 MBytes  2.37 Gbits/sec                  
[  5]   6.00-7.00   sec   283 MBytes  2.37 Gbits/sec                  
[  5]   7.00-8.00   sec   153 MBytes  1.28 Gbits/sec                  
[  5]   8.00-9.00   sec   283 MBytes  2.37 Gbits/sec                  
[  5]   9.00-10.00  sec   283 MBytes  2.37 Gbits/sec                  
[  5]  10.00-10.01  sec  3.00 MBytes  2.37 Gbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.01  sec  2.51 GBytes  2.15 Gbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201 (test #2)
-----------------------------------------------------------
^Ciperf3: interrupt - the server has terminated

