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I am trying to setup an iperf test but the client side keeps getting connection refused message.

Server side:
ubuntu@webserver1:~$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
ubuntu@webserver1:~$


Client side: 
test@ubuntu:~$ sudo iperf -c 192.168.1.2
connect failed: Connection refused
test@ubuntu:~$

The command I am using is exactly like this guide here: http://openmaniak.com/iperf.php

and I saw some previous iperf questions, but they do not provide a solution on what's wrong here: iperf connect failed: Connection refused https://serverfault.com/questions/643420/network-connectivity-reachability-between-nodes-located-in-the-same-lan-using Iperf bidirectional bandwidth measurement

I have a vlan id setup for my network, and both my server and client are on the same vlan id, and they can ping each other. So I don't think the it's cause by a vlan id. Its not the firewall either. ufw is disabled. I am running ubuntu server 14 on both client and server.

thanks everyone

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  • You are starting the server first aren't you? The way you've shown the commands implies that you're trying to start the client first (which won't work). Dec 6, 2014 at 13:24
  • hey @Paul Haldane, I am starting the server first, I copied the order wrong, sorry for the confusion
    – D.Zou
    Dec 6, 2014 at 19:20

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