我有一個程式在連接埠 5005 上運行，該連接埠正在偵聽並可透過 localhost 存取：
znc-admin:~/.znc$ netstat -tulpn | grep 5005
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 0.0.0.0:5005 0.0.0.0:* LISTEN 25476/znc
znc-admin:~/.znc$ wget -p http://localhost:5005
--2014-11-26 11:25:21-- http://localhost:5005/
Resolving localhost (localhost)... 127.0.0.1
Connecting to localhost (localhost)|127.0.0.1|:5005... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1790 (1.7K) [text/html]
Saving to: `localhost:5005/index.html'
100%[===================================================>] 1,790 --.-K/s in 0s
2014-11-26 11:25:21 (155 MB/s) - `localhost:5005/index.html' saved [1790/1790]
Loading robots.txt; please ignore errors.
--2014-11-26 11:25:21-- http://localhost:5005/robots.txt
Connecting to localhost (localhost)|127.0.0.1|:5005... connected.
HTTP request sent, awaiting response... 200 OK
Length: 26 [text/plain]
Saving to: `localhost:5005/robots.txt'
100%[===================================================>] 26 --.-K/s in 0s
2014-11-26 11:25:21 (2.87 MB/s) - `localhost:5005/robots.txt' saved [26/26]
FINISHED --2014-11-26 11:25:21--
Total wall clock time: 0.01s
Downloaded: 2 files, 1.8K in 0s (88.2 MB/s)
不幸的是，從這個連接埠轉送測試網站來看，該連接埠似乎已關閉：http://www.yougetsignal.com/tools/open-ports/
並且頁面http://<my ip>:5005在我的瀏覽器中超時。
這讓我發瘋，我錯過了什麼？
答案1
我感覺這很簡單，但也許這對某人有幫助。我只需要透過我的 AWS 控制台為我的安全群組（即我的防火牆）新增一個例外。
在花了一個小時檢查伺服器的防火牆後，我之前曾多次遇到這種確切的情況。所以我希望這能提醒我自己和其他人檢查其他潛在的「防火牆」！