map key value issues

Results 17 issues of


                                            map key value

![image](https://user-images.githubusercontent.com/29120060/220221493-844ffd04-5d1d-442c-95b3-1ac27551f4f6.png) FTP server ![image](https://user-images.githubusercontent.com/29120060/220221659-78da89e9-e576-4e5d-ad3a-73509d43a9ae.png)

端口未关闭

![image](https://github.com/tavenli/port-forward/assets/29120060/437d7f95-c59d-43b4-a3ad-50a43a6b454d) 192.168.9.38 数据库存在，大量端口未释放， ``` tcp 0 0 192.168.9.21:40928 192.168.9.38:1521 ESTABLISHED 10051/./forward-ser tcp 0 0 192.168.9.21:34424 192.168.9.38:1521 ESTABLISHED 10051/./forward-ser tcp 0 0 192.168.9.21:34056 192.168.9.38:1521 ESTABLISHED 10051/./forward-ser tcp 0 0 192.168.9.21:34796 192.168.9.38:1521...