Linux Study notes seven week three lessons (March 21)

10.11 Linux Network related

Ifconfig-a can display the disabled or down network card;

Start the network card #ifup ens33; Disable the network card #ifdown Ens33;

Nic configuration file/etc/sysconfig/network-script/ifcfg-ens33

Copy Create virtual network adapter profile, #cd /etc/sysconfig/network-script/

#cp Ifcfg-ens33 ifcfg-ens33\:0

#vi!$

10.12 Firewalld and NetFilter

Getenforce View firewall status;

10.13 NETFILTER5 Table 5 Chain Introduction

View NetFilter instructions, #man netfilter;

10.14 iptables Syntax

Rules Save directory,/etc/sysconfig/iptables

-a add added;

-I insert insertion;

-D Delete delete;

-Z Zero 0;

Show rule serial number #iptables-nvl--line-numbers

Delete the first rule #iptables-d INPUT 1

-p policy Default rule; #iptables-p input drop causes disconnection; #iptables-P input ACCEPT;

Extensions (SELinux understands)

1. SELinux Tutorial Http://os.51cto.com/art/201209/355490.htm

2.selinux PDF ebook Http://pan.baidu.com/s/1jGGdExK

Linux Study notes seven week three lessons (March 21)