Shulou(Shulou.com)06/01 Report--

This article introduces the relevant knowledge of "basic settings and port opening commands of Linux firewall". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Turn off the firewall

CentOS 7, Linux distribution firewalls before RedHat 7 are on and off (iptables):

Effective immediately, restart fails

# enable service iptables start # close service iptables stop

Restart takes effect

# enable chkconfig iptables on # close chkconfig iptables off

The firewall of Linux distribution after CentOS 7 and RedHat 7 is on and off (firewall):

Systemctl stop firewalld.service

Open port

CentOS 7, Linux distributions before RedHat 7 open ports

# Open port 5212 command # Open port 5212 to receive data / sbin/iptables-I INPUT-p tcp-- dport 5212-j ACCEPT # Open port 5212 to send data / sbin/iptables-I OUTPUT-p tcp-- dport 5212-j ACCEPT # Save configuration / etc/rc.d/init.d/iptables save # restart fire wall service / etc/rc.d/init.d/iptables restart # check to see if it is on Boot successful / etc/init.d/iptables status

Open ports for Linux distributions after CentOS 7 and RedHat 7

Firewall-cmd-zone=public-add-port=5121/tcp-permanent #-zone scope #-add-port=5121/tcp add ports in the format: Port / communication protocol #-permanent * * takes effect. If you restart without this parameter, the basic settings and port opening commands of Linux Firewall will expire here. Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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