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This article mainly introduces how to open the specified port number under Linux, which has a certain reference value. Interested friends can refer to it. I hope you will learn a lot after reading this article. Let's take a look at it.

Mode one

CentOS:

1. Open firewall systemctl start firewalld2 and open designated port firewall-cmd-- zone=public-- add-port=1935/tcp-- permanent command meaning:-- zone # scope-- add-port=1935/tcp # add port, format: Port / communication protocol-- permanent # takes effect permanently 3. Restart the firewall firewall-cmd-reload4, view the port number netstat-ntlp / / view all current tcp ports netstat-ntulp | grep 1935 / / View the usage of all 1935 ports mode 2

# Open port: 8080

/ sbin/iptables-I INPUT-p tcp-dport 8080-j ACCEPT

Mode 3

-An INPUT-m state-state NEW-m tcp-p tcp-dport 8080-j ACCEPT

Service iptables restart

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