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,
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
0x00 iptables Introduction
The package filtering function of linux is the linux firewall, which consists of netfilter and iptables.
The netfilter component, also known as the kernel space, is a part of the kernel. It consists of information packet
1. in fact, the matching extension also needs to be added to the display extension of the-m reference module. the default value is implicit extension. do not use the-m status Detection Package to filter-mstate -- state {NEW, ESTATBLISHED, INVALID,
1. in fact, the matching extension also needs to be added to the display extension of the-m reference module. the default value is implicit extension. do not use the-m status Detection Package to filter-mstate -- state {NEW, ESTATBLISHED, INVALID,
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
Five rules of iptables: three rule tables of PREROUTINGFORWARDPOSTROUTINGINPUTOUTPUTiptables: five rule chains are included in three rule tables: filter for packets: INPUT, FORWARD, OUTPUTnat: address Translation: PREROUTING, POSTROUTING, and
1. Introduction: CentOS? What is the shortest margin of the dual ship ?? Powerful Fire Prevention ??, It is collectively referred to as iptables, but the more correct name is iptables/netfilter. Iptables is a usage? Which region accounts? ?? Why?
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