Linux Firewalls and selinux__php

1. Shutdown Firewall permanently effective
Open: Chkconfig iptables on
Close: chkconfig iptables off immediate effect
Open: Service iptables start
OFF: Service iptables stop view
Chkconfig–list iptables

2. Close SELinux permanently valid
Modify the Selinux= "" in the/etc/selinux/config file as disabled, and then reboot to take effect immediately
Setenforce 0 View
Sestatus

3. Close the IPv6 firewall
Chkconfig Ip6tables off

4. UFW Firewall
Iptables is too cumbersome, UFW support interface operation enabled/disabled
UFW Enable
UFW Disable Allow/disable ports
UFW allow 22
UFW Delete allow 22 allow/disable services
UFW Allow SSH
UFW delete allow SSH allow/disable IP
UFW allow from 192.168.60.219
UFW Delete allow from 192.168.60.219 allow/disable TCP
UFW Allow 22/tcp
UFW Delete Allow 22/tcp View status
UFW status