sysconfig iptables

Time:2014-12-19 01:17Source:CsdnAuthor:Big Wisdom ReportClick:5,639 playsWould like to do some firewall policy. The firewall policy is written in the/etc/sysconfig/iptables file. But I found that I did not have this file.Cd/etc/sysconfig/[[email

Basic operational commands for firewallsQuery firewall status: [[email protected] ~]# service iptables statusStop firewall: [[email protected] ~]# service iptables Stop Start firewall: [[email protected] ~]# service iptables start Restart firewall: [

CentOS Configuration Firewall Operation instance (start, stop, open, closed port):Note: The basic operation of the firewall command:Querying firewall Status:[[Email protected] ~]# service iptables statusTo stop the firewall:[[Email protected] ~]#

Note: The basic operation of the firewall command:Querying firewall Status:[[Email protected] ~]# service iptables statusTo stop the firewall:[[Email protected] ~]# service iptables Stop To start the firewall:[[Email protected] ~]# service iptables

124. *. * This ip segment is very disgusting, it is recommended to block # iptables-F # iptables-PINPUTACCEPT # iptables-POUTPUTACCEPT # iptables-PFORWARDACCEPT # iptables-AFORWARD-s124.115.0.0/24-jDROP # iptables on the server 124. 115. *. * This

Iptables-F # Allow packets to enter iptables-AINPUT-ptcp from port 22? Dport22-jACCEPT # The packet that allows access from port 22 returns iptables-AOUTPUT-ptcp? Sport22-mstate? StateESTABLISHED-jACCEPTiptables-AOUTPUT-pudp? Dport5 Iptables-F #

Iptables-F # Allow packets from port 22 to enter iptables-AINPUT-ptcp -- dport22-jACCEPT # Allow packets from port 22 to return iptables-AOUTPUT-ptcp -- sport22-mstate -- stateESTABLISHED-jACCEPTiptables-AOUTPUT- pudp -- dp Iptables-F # Allow

Firewall instructions: iptables-L view firewall rules iptables-save display current iptables settings iptables-tmangle-L view firewall advanced settings (including prerouting, input, forwad, output, postrouting)

[Root @ hqw ~] Cdhomeappmysql [root @ hqwmysql] ls -- unzip the MySQL-community-5173-1rhel5i386rpm-bundletar [root @ hqwmysql] tar-xvfMySQL-community-5173-1rhel5i386rpm-bundle [Root @ hqw ~] # Cd/home/app/mysql [root @ hqw mysql] # ls--decompress

To enable port 80 access in CentOS firewall settings, we add port 80 as an example: [root @ centoshttpd] #/sbin/iptables-IINPUT-ptcp -- the dport80-jACCEPT saves [root @ centoshttpd] #/etc/rc. d/init. d/iptablessaveiptables: set Enable port 80

in the Rhel/centos System, the default FTP software is vsftp, the following is the installation configuration process. server:balichvm(192.168.171.51)1),yum install vsftpd Package[email protected] ~]# Yum install vsftpd2), start vsftpd

Iptables is just a Linux firewall management tool, located in/sbin/iptables. The real firewall function is NetFilter, which is the internal structure of implementing packet filtering in the Linux kernel. The iptables contains 4 tables and 5 chains.  

SELINUXThere are two ways to turn off SELinux: Temporarily turn off the SELinux firewall and SELinux will open after the next reboot. #setenforce 0 #getenforce#查看临时关闭selinux的状态命令永久关闭selinux#vi/etc/selinux/config#修改selinux的配置文件Change

Understanding Firewalls Concept Role Firewall category on Linux Packet filtering mechanism NetFilter Program Control mechanism TCP Wrappers General network Cabling Ability to use

CI server: 192.168.4.221Root User ActionsRecommended to update the operating system before installation# Yum UpdateRestart after update is complete# RebootInstalling Apache# Yum install httpd Httpd-devel# Service Httpdstart# Chkconfig Httpdon# vi/

CentOS configures firewall operation instances (enable, stop, enable, and disable ports) and centos instances Basic firewall operation commands Query the Firewall Status: [root @ localhost ~] # Service iptables status Stop firewall: [root @

Background:It should be very easy to build a pptp vpn Server. However, many of my friends have turned to me for help after reading some articles and have taken many detours.Therefore, I think it is necessary to write an article to explain it. After

Server address: 192.168.0.112root user Action recommended update operating system before installation # Yum update update complete reboot # reboot install apache# yum installs httpd httpd- /etc/httpd/conf/ httpd.conf find ServerName and

How Linux firewalls Open specific portsIptables is a firewall under Linux and is also the service name.Service iptables Status View firewall stateService iptables start to turn on the firewallService iptables Stop shutting down the firewallService

Linux Operations Phase III (VII) NFS configuration1, server-side software: Install Nfs-utils and Portmap (Rpcbind)Nfs-utils: Offers two NFS daemons kits for RPC.NFSD and RPC.MOUNTDPortmap:nfs can actually be seen as an RPC server program, and to