Programmer Group

IP camouflage and port forwarding Firewall supports two types of network address translation IP address masquerade It can share multiple addresses in LAN and access to the Internet with a single public address IP address camouflage only supports IPv4, not IPv6 Address masquerading is enabled in the default external area Forward port Also ...

Virtual Web host Running multiple Web sites in the same physical server, each site does not occupy a real computer independently. Types of virtual hosts supported by httpd Domain name based virtual host Virtual host based on IP address Port based virtual host Build virtual host -- Based on domain name (1) install bind and httpd services. (2 ...

Under CentOS7.X: 1. firewall View firewall status: [root@localhost sunan]# systemctl status firewalld.service ● firewalld.service - firewalld - dynamic firewall daemon Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled) Active: inactive (dead) Docs: man:firewalld(1) Where Active is inactive ( ...

Virtual machine CentOS 7.X, docker 1.3.X, Win10 Idea 2018.1 The Docker plug-in has been downloaded by default Idea The default virtual machine docker has jdk installed Open docker configuration file, open port 2375 [root@xuan ~]# vim /usr/lib/systemd/system/docker.service Add ExecStart=/usr/bin/dock ...

Tomcat -- About Project Configuration Configuration Ports - involving three ports - modifying conf/server.xml # Close the port of tomcat <Server port="8005" shutdown="SHUTDOWN"> # Establish access to http, browser access <Connector port="8080" protocol="HTTP/1.1" connection ...

Stand-alone version configuration Upload installation package Upload to / bigdata decompression Unzip to / apps directory tar -zxvf /bigdata/hadoop-2.7.1.tar.gz -C /apps Configuring environment variables vi /etc/profile #In the final increase export HADOOP_HOME=/apps/hadoop-2.7.1 export PAT ...

Topology required for the experiment: First, three machines shut down selinux and firewall. [root@hostlocal ~]# systemctl stop firewalld [root@hostlocal ~]# iptables -F [root@hostlocal ~]# setenforce 0 // temporary, if permanently closed, modify / etc/sysconfig/selinux and change enforcing to disable ...

Several states in user-mode connection tracking A connection tracking system defines several states in which a connection may be in: NEW: The initial state of a connection (e.g. the arrival of a SYN packet in a TCP connection), or the firewall receives only traffic in one direction (e.g. before the firewall receives a reply packet). ESTABLISHE ...

Through blog posts: Haproxy service tuning and configuration detailsYou can already understand the role of Haproxy services;Through blog posts: Using Keepalived to Realize Hot Detailed Interpretation of Dual ComputerYou can already understand the role of Keepalived services. Haproxy service is a tool to build cluster scheduling with good perfo ...

Mysql+Keepalived Dual Main Mutual Architecture FrameworkTiming before configuration #Install ntpdate tool yum install ntpdate -y #Use ntpdate to proofread time (followed by ntp server) ntpdate pool.ntp.org I. Configuration of mysql dual backup 0. Test mysql installation yum install mariadb mariadb-server -y systemctl restart mariadb systemctl ...