centos iptables config

1. Introduction: CentOS? What is the shortest margin of the dual ship ?? Powerful Fire Prevention ??, It is collectively referred to as iptables, but the more correct name is iptables/netfilter. Iptables is a usage? Which region accounts? ?? Why?

1. Show the status of the firewallRun the following command with root privileges: # iptables-l-n-v Parameter description: -L: Lists the rules. -V: Displays detailed information. This option displays the interface name,

Firewall: Includes a software firewall (Iptables/netfilter-based packet filtering firewall) and hardware firewall, at the host or network edge of the message through the firewall to detect a certain conditions filtering a series of components.The

Introduction: centos generally has an iptables firewall. because the VPS of the centos system in hyper-v architecture adopts the IPTABLES setting method widely circulated on the Internet, port 22 of ssh cannot be modified, if you modify the ssh port,

Firewall:Firewalls in the IT domain: a complete set of security isolation tools;Software firewall:Application software processing logic to run the common hardware implementation of the firewall;The most common firewall in Linux is: NetFilter network

Here, we use iptables as a firewall, which is completely powerless in the face of attacks of a certain scale. if you encounter such attacks, based on the scale and characteristics, targeted Selection of hardware firewalls and anti-denial-of-service

Enable iptables firewall for CentOS and iptables for centos In fact, these things should be clearly written as soon as they are completed. They have been written for a long time. Maybe they have not been written in some places. I hope to see the

Introduction: centos generally has an iptables firewall. Because the vps of the centos System in hyper-v architecture adopts the IPTABLES setting method widely circulated on the Internet, port 22 of ssh cannot be modified, if you modify the ssh port,

Enable iptables firewall for CentOS CentOS used iptables as the firewall before 7.0 and firewall after 7.0. In fact, I don't know why, but most people use iptables, so I also use it. 1. Disable firewall  1 // stop firewall2 sudo systemctl stop

Iptables-F # Allow packets from port 22 to enter iptables-AINPUT-ptcp -- dport22-jACCEPT # Allow packets from port 22 to return iptables-AOUTPUT-ptcp -- sport22-mstate -- stateESTABLISHED-jACCEPTiptables-AOUTPUT- pudp -- dp Iptables-F # Allow