cloudflare dns servers

--> Master/Slave DNS Server: Master DNS: the Administrator manually updates the database; Secondary DNS server (SlaveDNS): Database updates are completed from the primary server or other secondary DNS servers; I. Common DNS comma

= deletion record:ansible-playbook-ihosts dns.yml-verbose--extra-vars "parameter=deletedomain=test.comname=wwwipaddress= 192.168.1.1 "ansible-playbook-ihostsdns.yml-verbose--extra-vars "parameter=deletedomain=test.comname=testipaddress=www.test.com.# Point cannot be canceled Update Records ansible-playbook-ihostsdns.yml-verbose--extra-vars Parameter=updatedomain=test.comname=wwwipaddress=192.168.1.1ipaddress2=192.168.1.2 "ansible-playbook-ihosts dns.yml-verbose--extra-vars "parameter=updatedom

DNS (Domain Name Server) is a huge distributed database that provides a specified Domain information through the Domain Name Server for Domain Name resolution. The Domain Name Server is responsible for converting the Domain Name to an IP address. It is impossible to put all Domain Name Information in the Internet on the same computer. Therefore, the DNS system uses a tree structure to store domain name info

, so every ISP has a DNS. When you enter a text URL in the address bar of your browser, it first connects to your ISP's domain name resolution server to find its IP address. If it cannot be found, connect to the DNS on the previous layer to continue the query. Currently, only five master-level DNS servers have a comple

1. Nslookup (name server lookup): a tool used to query Internet domain name information or diagnose DNS server problems. Nslookup can specify the query type. You can check the DNS record survival time and specify the DNS server to be used for explanation. Nslookup is a command line tool that monitors whether the DNS se

responsible for maintaining all data in this subdomain. they can change data freely, and even divide the subdomains they manage into more subdomains and reallocate them. the parent domain only contains pointers pointing to these subdomains, so it references queries there. 1.2 A Domain name server is called a Domain name server ). generally, a Domain Name Server has complete information about some domain name spaces (called zone zones. the domain name server can have multiple zones for authoriza

1.DNS Concept:In a nutshell, DNS is a 53-port service on the system that provides the conversion of domain names and IP addresses to each other. For example, you visit www.csdn.net, the router is impossible to know this address, you need to connect to the DNS server first, the DNS server will return the Www.csdn.net IP

The architecture automatically resolves the DNS servers of different IP addresses, such as Linux Enterprise applications and Linux server applications, based on the users of China Telecom and China Netcom. The following is a detailed description. This document is based on FreeBSD and BIND platforms. Win users should be avoided. If there is no FreeBSD basic, do not. Linux or other Unix users can serve as ref

Use Zabbix to monitor DNS servers The company uses BIND9 as the internal DNS server for daily internal and external domain name resolution. In the future, we will also plan to deploy the DNS server on the Internet to resolve the internal domain name of the internet server, so as to prepare for future automated O M. Th

Many large websites use multiple server (IP) addresses to provide services for a single website to relieve stress and avoid spof. This includes using DNS round training for load balancing. But for administrators, how can they monitor these servers? The following script can help you implement it. Importsocket, urllib. parse Many large websites use multiple server (IP) addresses to provide services for a si

Shanghai ms (Headquarters) has more than 800 nodes. subsidiaries, offices, and partners all over the world are remotely connected to the headquarters, what is the responsibility of the company as its in charge of the network! Details determine success or failure: network devices (such as routers, switches, firewalls), servers ...... Next to the PC, and even an OE (or outlook) configuration, backup, mail import, export, and so on all have very detailed

the proxy server, the proxy server directly sends the buffered content to the user. If there is no buffer, a request is sent to the WEB server first to retrieve the data, and then the local cache is sent to the user. This method reduces the number of requests sent to the WEB server and the load on the WEB server. Ii. System Architecture 1. Principles DNS round robin technology is used to distribute requests from clients to one of the Squid reverse pr

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and IP address of the root domain server , and other related information. :?4.? start NamedExecute the "servicenamed start" command, start the named Service, and confirm with the netstat command The port listening status of the named service. If the service fails to start or if the UDP port is not listening properly , you can troubleshoot errors based on the error message (or The log records in the/var/log/messages file) , and then restart the service. :Cache name server is built

/** The architecture automatically resolves DNS servers of different IP addresses based on Telecom and Netcom users* This article describes how to allow the DNS server to parse different image server IP addresses based on the user's IP address. * Version: 1.1.0* Author: phonograph (milk cover)* Website: http://wuhongsheng.com* Copyright: (C) 1999-2006 wuhongsheng

NFS is a Web FileSystem network file system developed by Sun that is equivalent to a win mapped network drive that can "mount" a directory on an NFS server to a local directory on a local machine.The NFS configuration file is:/etc/exports [' eksp2rt] output, exportVi/etc/exports:/home/dir_to_exported clients_nfs (rw, sync and other sharing options)In fact, the configuration and use of NFS shares is the same as the idea and procedure of using smbclient or mount to make Linux share Windows shared

Iptables-fIptables-xIptables-zIptables-p INPUT DROPIptables-p OUTPUT ACCEPTIptables-p FORWARD ACCEPTIptables-a input-p TCP--dport 56388-j ACCEPTIptables-a input-p TCP--dport 53-j ACCEPTIptables-a input-p UDP--dport 53-j ACCEPTIptables-a input-p TCP--sport 53-j ACCEPTIptables-a input-p UDP--sport 53-j ACCEPTIptables-a input-p icmp-j ACCEPTIptables-a output-p TCP--dport 31337-j DROPAllow YumIptables-a input-m State--state established,related-j ACCEPTIptables-a output-m State--state established,rel