可以使用CURL命令結合MySQL的端口連接字符串來(lái)檢查MySQL端口是否開(kāi)放。具體操作如下：，否開(kāi)放，端口1. 打開(kāi)終端或命令提示符。否開(kāi)放，端口2. 輸入以下命令：，否開(kāi)放，端口“bash，否開(kāi)放curl -v --http1.1 "http://目標IP地址：端口號/"，端口`，否開(kāi)放，端ヾ(＾-＾)ノ口將"目標IP地址"替換為實(shí)際的否開(kāi)放MySQL服務(wù)器IP地址，將"端口號"替換為實(shí)際的端口MySQL端口號（默認為3306）。，否開(kāi)放，端口??3. 如果端口開(kāi)放，你將看到類(lèi)似于以下的輸出：，，`bash，* Re??built URL to: http://目標IP地址：端口號/，* Connection state changed (IHLAST, keepalive (fd=3))!，`，，如果端口未開(kāi)放，你將看到類(lèi)似于以下的輸出：，，`bash，* Rebuilt URL to: ht(?Д?)tp://目標IP地址：端口號/，* Connection state cha(′?ω?`)nged (IHLˉ\_(ツ)_/ˉAST, keepalive (fd=3))!，* TCPヽ(′▽?zhuān)?/_NODELAY set，* Connected to 目標IP地址 (目標IP地址) port 端口號 (#0)，* GET / HTTP/1.1，* Host: 目標IP地址：端口號，* User-Agent: curl/7.64.1(//ω//)，* Accept: */*，* Empty reply from server，* Connection #0 to hos(′?｀)t 目標IP地址 leftヽ(′▽?zhuān)?ノ intact，curl: (56) Empty reply from ser(′?_?`)ver，“，，在這種情況下，端口可能未開(kāi)放或MySQL服務(wù)未運行。請檢查MySQL服務(wù)器的配置和狀態(tài)。

要使??用CURL檢查MySQL端口是否開(kāi)放，可以按照以下步驟操作：

1、打開(kāi)命令行終端（Windows下為cmd，Linux和Mac下為T(mén)erminal）。

2、輸入以下命令，將(jiang)your_mysql_host替換為你的MySQL服務(wù)器地址，將your_username替換為你的MySQL用戶(hù)名，將your_passw(/ω＼)ord替換為你的MySQL密碼，將3306替換為你的MySQL端口號（如果不同的話(huà)）：

curl v http1.1 "http://your_mysql_host:3306/" user your_username(???):your_pass??word

3、觀(guān)察輸出(chu)結果，如果端口開(kāi)放ヽ(′?｀)ノ，你將看到類(lèi)似以下的輸出：

Rebuilt URL?? to: http://your_mysql_host:3306/ Trying your_mysql_host...TC(′▽?zhuān)?)P_NODELAY setConnected to your_mysql_host (your_mysql_host) po(╯°□°）╯rt 3306?? (#0)> GET / HTTP/1.1> Host: your_??mysql_host:3306> UserAgent: cu??rl/7.64.1&??gt; Accept: */*> Authorization: Basic your_base64_encoded_uヽ(′▽?zhuān)?ノsername_and_password>< HTTP/1.1 401 Unauthor??ized< Server:ヾ(?■_■)ノ nginx/1.14.0 (Ubun(′；д；`)tu)< Date: Wed, 09 Jun 2021 08:23:41 GMT< ContentType: text??/??html; charset=UTF8< ContentLength: 202< Connection: keepaliヽ(′▽?zhuān)?/ve< WWW??Authen(???)ticate: Basic realm="Restricted??"<?? XContentTypeOptions: nosniff< XXSSProtection: 1; mode=bl┐(′?｀)┌ock< XFrameOˉ\_(ツ)_/ˉptions: SAMEO(°o°)RIGIN< ETag: W/"1424B5AOg"< CacheControl: maxage=0, mustrevalidate, nocache, nostore< XRequestId: f9a7e8f8f9a7e8f8f9a7e8f8f9a7e8f8f9a7(′?｀)e8f8f9a7e8f8f9a7e8f8f9a7e8???f8f9a7e8f8f9a7e8f8f9a7e8f8f9a7e8f8f9a7e8f8f9a7e8f8f9a7e8f8f9a7e8(′_｀)f8f9a7e8f8f9a7e8f8< XRuntime: 0.000??000< XPoweredBy: PHP 7.2.240ubuntu0.16.04.1<Ignoring the responsebodyConnection #0 to host your_mysql_host left intact

4、如果端口未開(kāi)放，你將看到類(lèi)似以下的輸出：

Rebuilt URL to: http://your_mysql_host:3306/ Trying your_mysql_host...TCP_NODELAY setconnect to your_mysql_host port 3306 failed: Connection refusedFailed to connect to your_mysql_host port 3306??: Connection refusedClosing connection 0

通過(guò)觀(guān)察輸出結果，你可以判斷MySQL端口是否開(kāi)放。