A Practical Method for viewing firewall processes in Linux

Article Title: A Practical Method for viewing firewall processes in Linux. Linux is a technology channel of the IT lab in China. Including desktop applications, Linux system management, kernel research, embedded systems, open source, and other basic categories to start the Firewall

1) takes effect after restart

Enable: chkconfig iptables on

Close: chkconfig iptables off

2) takes effect immediately and becomes invalid after restart

Enable: service iptables start

Disable: service iptables stop

You can use the preceding command to enable or disable other services in Linux.

When the firewall is enabled, make the following settings to enable the relevant ports.

Modify the/etc/sysconfig/iptables file and add the following content:

-A RH-Firewall-1-INPUT-m state -- state NEW-m tcp-p tcp -- dport 80-j ACCEPT

-A RH-Firewall-1-INPUT-m state -- state NEW-m tcp-p tcp -- dport 22-j ACCEPT

View all processes, including services. In the command, ps-aux is netconfig, which is the NIC Configuration tool on the Character interface in redhat.

Chkconfig -- list

You can list the default startup statuses of sysV and xinet services at each runlevel.

Service name Parameters

The parameter for viewing the status seems to be stat.

Self-starting service

Ntsysv