Test whether a website or IP port can be accessed in centos

Test whether a website or IP port can be accessed in centos

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How to test port connectivity in Linux

Linux host centos operating system, the project needs to access a URL path interface http://xxx.121.com.cn: 8081

Java.net. ConnectException: Connection timed out at java.net. SocksSocketImpl. connect (SocksSocketImpl. java: 392) nc checks nc-u-z-w 1 xxx.121.com.cn 80

No response information is returned. It cannot be explained!

The firewall is also off/etc/init. d/iptables stop

In windows, enter the url path in the address bar of the browser. No problem is found. Data is returned!

The problem should be on the linux host!

Why? Firewall interception? It's off. Waiting for resolution.