Thanks.
I checked port settings of my laptop (converter server), source system (agent) and ESXi (target).
Firewall settings of my converter server and the agent are disabled. In this case, it means that there are no limitation in port connections, I think.
And in vCenter converter wizard, I can find connection between agent and server are established.
The below is information of my target ESXi firewall.
Actually, I didn't defined ports for vCenter converter.However, the ports 22, 443 and 902 are open.
Therefore, I think it seems this setting also has no problem...Are there any wrong points?
[ESXi Firewall setting]
Configuration >Security Profile >Firewall
■Receive
SSH Server 22(TCP)
vSphere Client 902,443(TCP)
■Send
VMware vCenter Agent 902(UDP)
NFC 902(TCP)
httpClient 80, 443(TCP)