無法在 Ubuntu 伺服器上開啟端口

Question

root@server:~# ufw allow 83973/tcp
Rules updated
Rules updated (v6)
root@server:~# sudo ufw status verbose
Status: inactive
root@server:~# sudo ufw enable
Command may disrupt existing ssh connections. Proceed with operation (y|n)? y
Firewall is active and enabled on system startup

root@server:~# sudo ufw status verbose
Status: active
Logging: on (low)
Default: deny (incoming), allow (outgoing), disabled (routed)
New profiles: skip

To                         Action      From
--                         ------      ----
83973                      ALLOW IN    Anywhere                  
83973/tcp                  ALLOW IN    Anywhere                  
83973 (v6)                 ALLOW IN    Anywhere (v6)             
83973/tcp (v6)             ALLOW IN    Anywhere (v6)             

root@server:~# 

我正在嘗試添加偵聽連接埠 83973 但它不起作用。請指教

此致

Answer 1

我可能遺漏了一些東西，但是高於 65535 的 TCP 連接埠是不可能的，因為它們會溢出協定中專用於該連接埠的 16 位元。