dns anycast

Dns.c Copy Code code as follows: /* * DNS Query Program on Linux * * author:ismdeep@live.com * * */ Header Files #include #include #include #include #include #include #include List of DNS Servers registered on the systemChar dns_servers[10][100];int dns_server_count = 0;Types of DNS resource records:) #define T_A 1//ipv4 Address#define T_

Ten simple methods to mitigate DNS-based DDoS attacks Researchers found that attackers often use UDP flood attacks (UDP floods) in massive bandwidth-based DDoS attacks (Distributed Denial of Service attacks ). Because UDP is a connectionless protocol, attackers can use scripts to generate UDP packets easily.DNS mainly uses UDP protocol, but in some special cases, DNS also chooses to use TCP protocol accordi

When we install a broadband network, the ISP (Internet Service Provider) usually provides several DNS server addresses and then sets them in the Internet TCP/IP protocol settings window. At present, I believe everyone has encountered network problems caused by DNS. For example, the speed of webpage opening is too slow, some websites cannot be accessed, or the pages in IE browser cannot be displayed. To solv

Build a DNS server by yourself Preface: During normal internet access, domain names are all accessed. How can we convert domain names to IP addresses? What about accessing our server host? In this case, you need to use the DNS server. DNS is composed of a domain name parser and a Domain Name Server. A Domain Name Server is a server that stores the domain names an

DNS ServerDNS OverviewWhen a DNS client wants to communicate with a host, for example to connect www.baidu.com, the client queries the DNS server for the IP address of the host, and when DNS receives the request, the DNS server assists the client in querying the www.baidu.co

DNS servers -- An Internet Achilles 'heel DNS server-a critical weakness of the Internet (Endurer Note: An/one's Achilles heel fatal injuryAchilles is one of the Greek gods, "Achilles ". It is said that Achilles's ankle seems very small, but it is a fatal weakness. See: http://vweb.cycnet.com/cms/2004/englishcorner/practical/t20050623_23574.htm) By Joris EversAuthor: Joris EversTranslation: endurer Keyword

One of the most popular vulnerabilities recently discovered by the DNS protocol itself is a serious problem (cert vu #800113 ). Most of the domestic media reports are vague, so I want to talk about the vulnerability. First, we need to clarify the first question: how is DNS query performed? For most desktop systems, DNS queries are not completed by their own machi

A: What is DNS why there is DNSDomain Name Systems (English: Domain Name System, abbreviation: DNS) is a service of the Internet. The internet was born early because the number of access to the Internet is very small, there is no dedicated DNS server to the entire Internet domain name, at that time only in our host file records the host and IP corresponding relat

In the actual application process may encounter the problem of DNS parsing errors, that is, when we access a domain name can not be completed to resolve the work of the IP address, and the direct input of the Web site IP can be normal access, this is because of DNS resolution failure caused. The probability of this phenomenon is relatively large, so this article will be from the beginning of zero to teach r

Many people may not have a special understanding of the configuration of broadband routers. Here we mainly explain how to configure DNS for HiPER broadband routers. In recent years, with the increasing popularity of AI and HiPER series routers in the market, the hotlines of UTTCare call center 4006-781-781 are getting increasingly busy. From the technical feedback from many callers, it seems that many customers do not know much about the role of

0 × 01.1 Domain Name System) DNSDomain Name SystemDomain Name System Maps domain names and IP addresses in the form of a distributed database. The DNS protocol is the domain name resolution protocol. Simply put, DNS is used to resolve domain names. With DNS, we don't need to remember annoying IP addresses. We can access the server with a relatively memorable doma

In the process of accessing the Web site, we may often encounter the phenomenon of inaccessible web pages, when encountered this phenomenon, I believe most people will subconsciously think that the network dropped, or the target site of the server there is a problem, but after a careful investigation, the Web page can not open the phenomenon is not caused by these factors, So what is the reason for the Web page content can not open it. In fact, the most likely cause of the inability to open a W

Each computer in the Internet has a unique IP address that can be connected to the corresponding host by IP address. However, the IP address is a number of abstract numbers, inconvenient memory, it is best to use some meaningful combination of characters to represent a host, resulting in the domain Name System (dns,domain name systems). DNS addresses a number of meaningful combinations of characters to an a

Outline: How to discover services in KubernetesHow to discover how pod-provided services use the Service Discovery service to use the Kube-dns discovery service Kube-dns principleCompose domain name format configuration Note: This share is based on the Kubernetes 1.2 version. Let's start with a simple example. 1. How to discover service in Kubernetes Discover pod-provided services First create a Nginx depl

With the continuous development of information technology, people's requirements for IT infrastructure are also higher, beginning to require the provision of rapid delivery, batch deployment, data analysis, network virtualization and other new needs, the major manufacturers also for their products to continue to improve, DNS began in Windows Server above just provide the simplest domain name resolution, caching, forwarding and other functions, and lat

The DNS Server is a Domain Name System or Domain Name Service, and RHEL 5 is a System with many applications. Therefore, it is very important for RHEL 5 to build a DSN server, the following is a detailed explanation of how RHEL 5 builds a DNS server.1. Set up DNS server domain name and domain name resolution in RHEL 5In order to differentiate each host in the net

parse, these can not be resolved on a server, it is too slow. DNS parsing uses a tree-structured parsing process.In front of the above parsing process in fact there is a step, the system before issuing a DNS resolution will first look at whether the local preservation of the relevant domain name resolution, if any, will save a lot of time. The file is saved in theC:\Windows\System32\drivers\etc\hosts, the

Open a Web page with a "No server or DNS error" problem I'm sure you've all met, can be on the QQ, Thunder download, and directly enter the IP address can be successfully boarded, but could not open the Web page (IE, Ttravel and the World Window 3.0); On the network to search for solutions If you have encountered a similar problem, please read it slowly. (1) Using Nslookup to determine whether a DNS resolu

People may have such a puzzle: computers on the network can only identify such as "123.123.123.123" such as digital address, so why when we open the browser, in the Address bar to enter the domain name dns.qy.com.cn, we can see the page we need? In fact, just an IP address and domain name each other "translation" process. The former has to establish a domain name Mapping record that points to the corresponding IP address; for the latter, this record has been established and is in effect. The cr

1. experiment environment 1.1 requirements Configure forward parsing bind Configure reverse resolution bind Configure bind of secondary DNS Implement regional transfer between primary and secondary DNS 1.2 Environmental Planning Primary DNS: centos6.8-01 172.24.8.10 linuxmaster.aliyun.com Secondary DNS: centos6.8-