Programming VIP

preface netfilter/iptables (iptables for short) constitute the packet filtering firewall under Linux platform The iptables component is a tool, also known as user space, that makes it easy to insert, modify, and remove rules from the packet filter table netfilter component, also known as kernel space, is a part of the kernel. It is composed ...

iptables are shielded according to the specified country (installation and use of GEOIP module) This process is suitable for Centos7* system 1, Install iptables addons (geoip module) 1. Download lux source wget http://repo.iotti.biz/CentOS/7/noarch/lux-release-7-1.noarch.rpm 2. Install lux source rpm -ivh lux-release-7-1.noarch.rpm --f ...

1.SNAT 1.1 SNAT application environment LAN hosts share a single public IP address to access the Internet (private IP cannot be routed normally in the Internet) 1.2 SNAT principle Modify the source address of the packet 1.3 preconditions for SNAT conversion 1. Each host of LAN has correctly set IP address, subnet mask and default gate ...

1, Introduction to Linux Firewall yum -y install iptables-services.x86_64 #install Must be closed first firewalld firewall [root@localhost ~]# systemctl stop firewalld.service [root@localhost ~]# systemctl disable firewalld.service install iptables firewall [root@localhost ~]# yum -y install iptables-services.x86_64 #install [root ...

Some time ago, there was a problem with the company's Android packaging service. The phenomenon is that when uploading the 360 server for reinforcement, it is very likely to get stuck in the upload stage, retry for a long time, and finally fail. I have conducted some troubleshooting and Analysis on this situation, solved this problem, wrote thi ...

1, Deploy PPTP VPN server 1. Check whether the server system environment supports the installation of pptp 1,Check whether the system kernel supports MPPE patch [root@PPTP ~]# modprobe ppp-compress-18 && echo success display success Description system support MPPE If the patch is not supported, you need to install it first k ...

netfilter Kernel Implementation overview 1, Foreword netfilter is the foundation of network firewall in Linux kernel. Whether it is iptables based on xtables, conntrack and nftables, its bottom layer is based on netfilter. In general, netfilter provides a relatively general firewall framework, which provides an entry through which other netwo ...

iptables firewall Function: prevent others from entering your own computer and attacking your own computer. You can't kill viruses Attack mode: dos ddos cc syn flooding et al SNMP protocol --- simple network manager protocol Simple network management protocol port 161 tcp/udp Software firewall The firewall function of linux system is ...

CentOS 7.0 uses firewall as a firewall by default and uses systemctl to manage services and programs, including service and chkconfig 1. View the default firewall status (not running when turned off, running when turned on) [root@localhost ~]# firewall-cmd --state not running 2. Check the status of the firewall [ro ...

Fastdfs_5.08 + nginx_14.0 cluster deployment Server planning: 1, All tracker and storage nodes should execute: 2, Configure tracker server 3, Configure storage server 4, File upload test (ip01) 5, Install fastdfs nginx module on all storage nodes 6, Verify: access files uploaded during test through ...