Sorry my mistake
A LoadGenerator and a Proxy Machine are on the other side from the firewall.
The port 443 is open, I can see the traffic on wireshark from LoadGeneratoron the MI-Listener machine.
When I use the LR-Agent on my Generator PC, I can see in Wireshark on the MI-Listener, which established a connection from LR-Agent-->Proxy-->Firewall-->MI Listener. The Agent sent data-packets, after receive 2 packets the MI Listener reset the TCP Connection. [RST Flag is set]