dns opendns

Tags: DNS Linux operationsTest environment:Os:centos 6.5bind:9.8.2Software Installation method: YumMain Dns:realserver1 192.168.200.134From Dns:realserver2 192.168.200.135Test server: test01 192.168.200.136First Step: Environment preparationMounting the ISO disc provides a local Yum source, and if your server can provide an external network, you may not need to configure the local Yum source to use the network Yum source directly.Local Yum Source conf

DNS is divided into client and server. The client plays the role of question, that is, to ask the server a domain name, and the server must answer the real IP address of this domain name. The local DNS first queries its own database. If your database does not exist, you will ask the DNS set up on the DNS. After you get

Beijing DNS address: 202.96.199.20.202.96.0.20.202.106.0.20 202.106.148.1 202.97.16.195 Shanghai DNS address: 202.96.199.132 202.96.199.20.202.96.209.5 202.96.209.20. Tianjin DNS address: 202.99.96.68 10.10.64.68 Guangdong DNS address: 202.96.128.143 202.96.128.68 202.96.128.110 Shenzhen

I. Domain Name and domain name resolution NetworkIn order to distinguish each host, you must assign a unique address to each host. This address is called "IP AddressAddress ". However, these numbers are hard to remember, so they are replaced by domain names. HoweverThe host can be accessed only when the domain name is converted to the corresponding IP address.The DNS service, also known as the domain name resolution service, provides mutual conversio

Author: vamei Source: http://www.cnblogs.com/vamei welcome reprint, please also keep this statement. Thank you! In Zhou xingchi's movie Tang bohu's qiuxiang, As soon as Zhou xingchi entered Washington, he was forced to add a code 9527. From then on, Washington started to call the main character 9527, rather than his name. Domain name is the IP address code. A domain name generally consists of characters. For humans, domain names composed of characters, such as www.yahoo.com, are easier

The DNS record disappears! Don't be confused. It's not so terrible. The first thing you need to do is to find the invisible DNS records (as described above). Now you have calmed down, let's take a look at how to fix the DNS records that disappear! Fix "corrupted" or wrong DNS records If the

Dns settings in linux Author: Slice① IntroductionDNS is the Domain Name System, which can convert a Domain Name such as www.21php.com to an IP address such as 211.152.50.35. If there is no DNS, When you browse the website 21php.com, you must use numbers that are so hard to remember as 211.152.50.35. The DNS server provides the

(1) restrict name server recursive query Disabling recursive queries can enable the name server to enter the passive mode. When it sends a query request to an external DNS, it will only answer the query request for its authorized domain, instead of caching any external data, therefore, it is impossible to suffer from cache poisoning attacks, but such actions also have negative effects, reducing the speed and efficiency of

ADSL modem VPI, VCI, and DNS information in various regionsGuangxi 0 35 DNS 202.103.224.68Beijing 0 35 DNS 202.106.196.115Guangdong Zhongshan 0 35 DNS: 202.96.128.68Hunan 0 35, DNS: 211.98.2.4Fujian, 0 200, DNS: 202.101.98.55 and

DNS domain name resolution The purpose of the domain name resolution is to convert the website name that users use to the TCP/IP protocol, and hostname is just convenient for people to remember, after all, IP is a pure digital address to the user is very unfriendly. However, when using TCP/IP communication, the computer is implemented through the IP address +port port number, so when we type a host name in the browser, we eventually need to convert

Transferred from: http://www.ruanyifeng.com/blog/2016/06/dns.htmlDNS is one of the core Internet protocols. Whether it's surfing the web or programming, you need to know a little bit about it.This article describes in detail the principle of DNS and how to use the tool software to observe its operation. My goal is that after reading this article, you will be able to fully understand DNS.First, what is DNS?T

Objective: Linux friends know that Bind is Linux under the DNS service software, but many people do not know, it can also run in Windows System, Windows system with DNS, weak, is not capable of intelligent DNS resolution, in Windows 2008 R2 version also did not solve this problem, some companies have weak technical strength, has been using Windows system, so this

There are many solutions, such as using Windows2000 or WindowsServer2003 to provide Network Load balancing services, but the settings for this service are complex. And it is a simple method to realize Network Load Balancing through DNS server. The author takes the Web server in the enterprise network as an example to introduce how to use the DNS server to achieve Network Load balancing. In order to increas

In actual application, DNS resolution errors may occur, that is, when we access a domain name, it cannot be resolved to an IP address, however, you can directly enter the website IP address for normal access, which is caused by a DNS resolution failure..Common Causes of DNS failure include:The domain name itself has expired or has been stopped;The

Code 9527---DNS Protocol In Zhou xingchi's movie Tang bohu's qiuxiang, As soon as Zhou xingchi entered Washington, he was forced to add a code 9527. From then on, Washington started to call the main character 9527, rather than his name. Domain name is the IP address code. A domain name generally consists of characters. For humans, domain names composed of characters, such as www.yahoo.com, are easier to remember than IP addresses composed of pure n

What is DNS tunnel? DNS tunnel is the DNS tunnel. The DNS query process is used to establish a tunnel and transmit data. Why use DNS tunnel? When you are in a hotel, airport or other public place, there is usually a Wi-Fi signal, but when you visit a website, such as _______

From: http://blog.csdn.net/cz_hyf/archive/2006/02/19/603022.aspx If a user node wants to obtain the corresponding "dpt1The IP address of. SEU. edu. cn. The processing of this node is as follows:1) send a "Answer" request to the local DNS server. To improve work efficiency, use the connectionless datagram service. If the local DNS server knows the corresponding dpt1. Seu. edu. if the local

1. What is DNSDNS: Domain Name Service, which is a hierarchical computer and network Service naming system that implements name resolution (HOSTNAMEDNS uses the C/s architecture, and the service listens on port 53rd of the host's tcp/udp. Transport Layer protocol UDP is used for domain name resolution, TCP for zone transferLocal name resolution file: Hosts (host limited time available)/etc/hosts%windows%/system32/drivers/etc/hosts2.dns ArchitectureA t

Dpkt tutorial #3: DNS Spoofing In our first and second dpkt tutorials, we looked at the simple construction and parsing of packets respectively. our third tutorial combines both parsing and construction of packets in a single utility for discovery DNS spoofing (a la dsniff's dnsspoof ). In this tutorial, we'll use dpkt to parse DNS requests observed on the wire a