chain input policy accept

Iptables firewall,1. Introduction Iptables is an open-source package-based firewall tool that comes with linux/unix. It is a service integrated in the kernel because it is flexible to use and does not require high hardware resources, it mainly works

Common ports on Linux serversFtp:20 ssh:22 http:80 telnet:23 rsync:873 svn:3690pop3:110 smtp:25 dns:53 mysql:3306 nfs:111If your iptables basic knowledge is not yet known, it is recommended to take a look first.Start configurationLet's configure a

Introduced Iptables is an IP packet filtering system integrated with the latest version 3.5 Linux kernel. If a Linux system is connected to an Internet or LAN, a server, or a proxy server that connects LAN and the Internet, the system facilitates

Iptables is an important means of access control in Linux and is an important part of Linux firewall system. Here are some common operating instructions for iptables firewall rules. The following operations are based on CentOS and should be similar

Iptables is an important means of access control in Linux and is an important part of Linux firewall system. Here are some common operating instructions for iptables firewall rules.The following operations are based on CentOS and should be similar

The iptables firewall can be used to create filters and NAT rules. All Linux distributions can use iptables. Therefore, understanding how to configure iptables will help you manage Linux firewalls more effectively. If you contact iptables for the

The iptables firewall can be used to create filters and Nat rules. All Linux distributions can use iptables. Therefore, understanding how to configure iptables will help you manage Linux firewalls more effectively. If you contact iptables for the

10.11 Linux Network relatedIfconfig if there is no ifconfig, you need to install the package[[email protected] ~]# yum install net-toolsIf you need to display all network card information, including down or no IP address, use the-a

The iptables firewall can be used to create filters and Nat rules. All Linux distributions can use iptables. Therefore, understanding how to configure iptables will help you manage Linux firewalls more effectively. If you contact iptables for the

CAT/etc/sysconfig/iptables * Filter: Input accept [0: 0]: Forward accept [0: 0]: Output accept [28: 4192]-A input-p tcp-m tcp -- dport 22-M state -- state new, established-J accept-A input-p tcp-m tcp -- dport 21-M state -- state new, established-J