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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=
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
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,
Iptables official website: Alibaba
IptablesHttp://netfilter.org/
Path of the data packet passing through the firewall
Port prohibited
Force access to a site
Publish an internal network server
Intelligent DNS
Port ing
Access through NAT
Save and
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
The method for starting and stopping iptables depends on the Linux release version in use. you can view the documentation of the Linux version in use. In RedHat, start iptables with: # serviceiptablesstart. generally, iptables is already included in
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
For more information about IPTABLES configuration in linux-general Linux technology-Linux technology and application information, see the following. Simple Application of IPTABLES:
Iptables-a input-p tcp-s 10.1.2.187-j ACCEPT
Add 10.1.2.187 to the
Netfilter/iptables is an IP information packet filtering system integrated with the latest Linux kernel version 2.4.x. If the Linux system is connected to the Internet or LAN, server, or a proxy server connected to the LAN and Internet, the system
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