Linux System Common Commands Summary (vii) Security settings

Security settings
Classification	Command	Options	Annotations
Security Policy SELinux	Setenforce	Number (0,1)	Set SELinux status, 0 off, 1 on
	Getenforce		Displays the current SELinux status, enforcing indicates enabled, permissive indicates off
Firewall	Iptables	Three tables: Filter,nat,mangle	Example: Iptables-a input-p tcp--dport 22-j ACCEPT
		-A (-i,-d)	Add (insert, delete) a rule
		INPUT (Output,forward)	Chain name
		-S	Source Address
		-P	Protocol (TCP,UDP,ICMP)
		--sport/--dport	followed by Source port/Destination port
		-D	Followed by Destination IP
		-j	followed by the action that triggered the rule, drop/reject/accept
Shutdown/Restart	Shutdown	Options	Shutdown
		-T	Specify how many seconds to shut down
		-R	Specify time to restart after shutdown
		-H	Specify time off
		-C	Cancel an ongoing shutdown
	Halt	Options	Hang Up
		-P	Shutdown
	Reboot		Restart =shutdown-r Now

Linux System Common Commands Summary (vii) Security settings