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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

clear information about the location of the house. Services provided by DNS We already know that you can use the host name to identify a master sail or an IP address. People prefer to use host name identifiers that are easy to remember, while vrouters only wish to use IP addresses with fixed length and hierarchical structure. To mediate these two different preferences, we need a directory service that converts the host name to an IP address. This is

At present, many enterprises and institutions have set up units within the LAN, the internal network are equipped with related servers (such as Web, FTP and other servers). Internal network users want all servers to use domain names to access, network administrators can use the way to build a DNS server to achieve. Set up a DNS server on the internal network that allows users to enter the IP address of the

read the basic requirements of this article:1. The use of the cmd command has a certain basis2. The basic principles of DNS and common concepts have a certain understanding, such as host, alias, forward lookup zone, reverse lookup zone, and so on.3. A simple understanding of network protocols, such as the basic configuration of TCP/IPNslookup is a command-line tool issued by Microsoft for detection and debugging.As an IT manager, must be on the Window

1, DNS is the domain name server, his task is to determine the domain name of the resolution, such as a record MX records and so on. 2, any domain name has at least one DNS, is generally 2. Why do you need more than 2? Because DNS can be used for recycling, the first parsing failure can be found in a second. So as long as there is a normal

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

Linux dns configuration and basic introduction! (GO) -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. I. Basic DNS knowledge As we all know, in network communication, data links Use MAC addresses. The network layer uses IP addresses, and the transport layer uses port numbers, each of which has its own identification method. IP addresses are t

Article Title: LINUX Study Notes: DNS server settings. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Install and learn REDHAT LINUX7.0 half a month ago. As a newbie to Linux, I encountered some inevitable problems. By reading books and materials, viewing BBS, I tried to solve some problems. Think of your own expe

One, the type of DNS server①Primary DNS Server (Master)A domain's master server holds the zone configuration file for that domain, and all of the configuration and changes are made on that server, and this essay explains how to configure a domain's primary DNS server②Secondary DNS Server (Slave)Domain slave server is g

Implement Network Access for DVRs through DNS Date: September 30,2012 Keyword: dns dvr Intranet Internet Network Proxy The company has several monitoring cameras with analog signals, which are centrally managed by a DVR through cable, and the DVR is accessed through the network line connected to the router through the Intranet, this allows you to view the current monitoring screen in real time.

First, DNS primary configuration fileA list file for a/etc/hosts-host-contains a list of known hosts (on the local network) if the system's IP is not dynamically generated, it can be used for simple host name resolution (dot notation/etc/host.conf-Conversion Program control file-tells the network domain name server How to find the host (usually/etc/hosts, then the domain name server, which can be changed by netconf)/etc/resolv.conf-Converter Profile-W

Talking about carrier website hijacking, I believe most readers are also suffering from it, today it's home collation, Win7, WIN8, Win8.1 system under How to modify the system's DNS server, and for their own network to choose the best DNS, easy to surf the internet. What is DNS hijacking? DNS hijacking is done by hij

The speed of surfing the Internet, and DNS server domain name resolution ability is closely related, I hope the internet surfing smooth sailing, we must find ways to ensure that the DNS server efficient and stable operation. To do this, we only have the workaround, dig deeper, and be good at using some of the details of the DNS server to make

DNS is one of the network infrastructure protocols, presumably everyone should have some understanding. DNS is one of the most important services for all windows-based networks. In the absence of DNS support, the Active Directory does not work, and it uses more features than any other type of network. As a result, it is a critical task to resolve the problem as s

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

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

With Windows PowerShell, Windows-plus DNS servers. From the point of view of adjusting DNS server to resolve IP time period, solve the problem of load balance of website.WIN2012R2, a list of commands for managing DNS servers with PowerShellPS c:\users\admin> Get-command *-module dnsserverCommandType Name ModuleName----------- ---- ----------Alias Export-dnsserver