iperf不触发udpspeeder连接？

[lijihao88]

English Only (except for bug reporting).
server conf:

client conf: (I hid the IP address of the server)

bind info:

Iperf can work well but it does not trigger the connection in UDPspeeder(both the client and server are listening, why?)

I clear all the iptables rules but it does not work.