iptables block incoming port

We recommend a good iptables-shell script to free you from the troublesome iptables configuration. I am not sure who the script author is, so I deleted the version declaration. system: centos5.9 script content: viiptables. sh #! /Bin/sh # -----------

The code is as follows Copy Code #!/bin/sh#------------------------------------------------------------------------------# for debugging use Iptables-v.Iptables= "/sbin/iptables"Ip6tables= "/sbin/ip6tables"Modprobe=

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,

Http://os.51cto.com/art/201107/273443.htm"51CTO exclusive feature" Linux system administrators have been exposed to netfilter/iptables, this is the Linux system comes with a free firewall, the function is very powerful. In the following

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

What is Iptables-general Linux technology-Linux technology and application information? For more information, see. Iptables is a packet filtering management tool based on the netfilter architecture. It is mainly used for firewall or transparent

Three tables are created: natmangle and filterfilter preset rule tables, there are three rule chains: INPUT, FORWARD, and OUTPUT. INPUT enters the FORWARD forwarding OUTPUT and goes out. ACCEPT releases the REJECT to block the packet. DROP the

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

Iptables details, iptables Iptables Introduction Netfilter/iptables (iptables for short) is a packet filtering firewall on the Linux platform. Like most Linux software, this packet filtering firewall is free of charge, it can replace expensive

# 1. Delete all existing rules Iptables-f # 2. Set the default chain policy Iptables-p INPUT DROP Iptables-p FORWARD DROP Iptables-p OUTPUT DROP # 3. Block a specific IP address #BLOCK_THIS_IP = "x.x.x.x"