Open ports of Linux Firewall

Open ports of Linux Firewall

I. Linux firewall configuration files and commands

1. RedHat Linux System

This type of system contains various derivatives and related versions of red hat, including RHEL, CentOS, and Fedrora.

Firewall Configuration File:/etc/sysconfig/iptables-config

Service Operation Command: etc/init. d/iptables service iptables {start | stop}

Temporary change command: iptables-save iptables-restore and so on

 

2. SUSE System

The SUSE system adopts its own firewall system

Firewall Configuration File:/etc/sysconfig/SuSEfirewall2

Firewall Resource Directory:/etc/sysconfig/SuSEfirewall2.d

Service Operation Command:/etc/init. d/SuSEfirewall2_init/etc/init. d/SuSEfirewall2_setup

RcSuSEfirewall2 {start | stop ...}

RcSuSEfirewall2 is a symbolic connection of/etc/init. d/SuSEfirewall2_setup.

Temporary change command: iptables-save iptabels-restore, etc.

 

3. Firewall System

Based on tables such as filter, nat, mangle, and raw, SUSE is more complex (or more distinctive)