firewall configuration checklist

Iptables IntroductionIptables is an IP packet filtering system integrated with the latest 2.6.x version of the Linux kernel. If a Linux system is connected to an Internet LAN, a server, or a proxy server that links the LAN and the Internet, the server facilitates better control over IP packet filtering and firewall configuration on Linux systems.Neitfilter/iptables IP packet Filtering system is a powerful t

hackers from accessing your network to the maximum extent, and prevent illegal intruders from changing, copying, and destroying important information in the computer. Compared with Windows, the Linux operating system is somewhat different, because it has built-in firewall or related security software, in addition, experienced system administrators can open their own firewalls based on their actual conditions and upgrade the kernel to solve security p

It is necessary to configure the Iptables firewall under CentOS. Let's learn how to configure! Set up firewalls in Linux, take CentOS as an example, and open the Iptables configuration file: Default Vi/etc/sysconfig/iptablesQuery for open 80 ports through the/etc/init.d/iptables status command if there are no two ways to handle: 1. Modify the Vi/etc/sysconfig/iptables command to add the

　IP/MAC Binding RequirementsThe MAC address and IP address binding, can prevent IP address spoofing network attack, IP spoofing attack attempts to use a trusted computer's IP address from different computers to connect and through the firewall, IP address can be easily changed, but the MAC address is in the factory production is added to the Ethernet card, it is difficult to change, A trusted host can avoid fraudulent connections by registering both t

If you do not know the basic knowledge of Linux firewall, You can first look at some basic things. Here we will introduce in detail some Linux firewall configurations. Start Configuration Let's configure a filter table firewall. (1) view the settings of IPTABLES on the local machine [root @ tp ~] # Iptables-L-n Chain I

　　 Iptables is the firewall configuration prerequisites on the Linux Server Setup tool, is our server security and deployment of large networks, often used in the important tools, very good grasp of iptables, can let us to the Linux server structure of the entire network a more thorough understanding, Better to master the Linux server Security configuration skill

CommandControl Firewall. When using firewall disable CommandClose Firewall, FirewallThe statistics will also be cleared. [Example] Enable Firewall. Quidway (config) # firewall enable [Related Command] Access-list, ip access-group Iv.

Disabling the firewall from the configuration menu does not work. simply do not install the firewall during installation to view the firewall status:/etc/init. d/iptablesstatus temporarily disable the firewall:/etc/init. d/iptablesstop disable

This article is first published in the dark world. The most recent server of the company needs to enable the FTP service to transfer files. However, considering that the server is on the public network, firewall is usually enabled for security considerations. In general, I disable the firewall for FTP servers in the company. Below I will flow out the firewall

Today is an era where hackers are common (this is 2cto.com's slogan). When you stay at your home and access the Internet, you may be "shot". attacks from time to time will definitely make your head big. Fortunately, many broadband cats have built-in firewall functions. If we enable this function, we can make our ADSL Internet access more secure and more secure.I. login to broadband cats There are many ways to log on to the broadband cat. For the conve

Today is an era where hackers are common. If you stay at your home and access the Internet, you may be shot. Attacking you from time to time will make your head big. Fortunately, many broadband cats have built-in firewall functions. If we enable this function, we can make our ADSL Internet access more secure and more secure. 1. log on to the broadband cat. There are many ways to log on to the broadband cat. For the convenience of the article, here we