linux firewall configuration command line

Linux under the Firewall (firewall) from the birth to the present, the firewall has experienced four stages of development: the first stage: the firewall based on the router, the second stage of the user Firewall tool sets; Phase III: A firewall

Linux under Iptables configuration detailed-A rh-firewall-1-input-p tcp-m State--state new-m TCP--dport 24000-j ACCEPT-A rh-firewall-1-input-s 121.10.120.24-p tcp-m tcp--dport 18612-j ACCEPTIf your iptables basic knowledge is not yet known, it is

1. Iptables configuration file & para;The default configuration file in RHEL/CentOS/Fedora Linux is:/Etc/sysconfig/iptables-the system executes the script to activate the firewall function by reading the file.2. Basic operation: Display the default

#/sbin/iptables-i input-p TCP--dport 80-j ACCEPT#/sbin/iptables-i input-p TCP--dport 22-j ACCEPT  #/etc/rc.d/init.d/iptables save  After restarting the computer, The firewall has already opened 80 and 222 ports by default.   Temporarily shut down

FIREWALLD Dynamic Firewall Manager service (Firewall Manager of Linux Systems) is currently the default firewall management tool, with a command line terminal and graphical interface configuration tool, Even unfamiliar with Linux commands can get

With this tutorial, make sure you can use Linux native. If you are using SSH remote, and can not directly operate the machine, then we recommend you cautious, cautious, and then cautious!With Iptables We can configure a dynamic firewall for our

Friends who often use CentOS may encounter the same problems as me. The firewall is turned on and the 80 port is inaccessible, and the friend who just started learning CentOS can refer to it.Friends who often use CentOS may encounter the same

(2) deploying a Linux environment (Centos + Nginx + Tomcat + Mysql)-firewall configuration In my local testing practice, the following is a complete operating document for Centos + Nginx + Tomcat + Mysql on Linux. The record is as follows, we hope

In the past few years, Linux has grown significantly as a firewall platform. Since ipfwadm of the earlier version 1.2 kernel, the Linux firewall code has gone a long way. The netfilter system is used in the 2.4 Linux kernel. In the latest version 2.4

I. FirewallOverviewNetwork Firewall is a technology used to enhance access control between networks and prevent external network users from illegally accessing internal networks and network resources through external networks, special network