我的猜测是你只转发RMI注册表端口（1099），但你还需要打开另一个端口。

My guess is that you're only forwarding the RMI registry port (1099), but you need to also open another port.

检查哪些端口在偏远的一方

Check which ports on the remote side

# netstat -nap | grep jstatd

tcp        0      0 :::1099     :::*       LISTEN      453/jstatd          
tcp        0      0 :::58204    :::*       LISTEN      453/jstatd          

在这种情况下，您需要转发端口58204以及1099

In this case you will need to forward port 58204 as well as 1099