recursive dns

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Learn DNS Series (ii) Understanding the primary DNS suffix option for a computer

Originally in this verse to explain the installation of DNS, but I found that in fact before this, but also need to explain a few basic concepts, first of all, the DNS suffix. In the previous basic chapters, we know that a domain name can be divided into the main and suffix 2 parts, where the host we can understand as a host or a network terminal name, the suffix directly determines the nature of the domai

A Brief Introduction to the concept of DNS server, and the establishment of a simple DNS name cache server to achieve domain name resolution (1)

DNS and BandDNS: Domain Name SystemWorking at the application layer, it is a protocol that listens to UDP and TCP ports 53 at the same time.UDP response query requestTCP response/Etc/HostAt the beginning, there was a relationship between the name you wanted to access and the corresponding name.However, as the network grows, the management and maintenance of host files becomes very troublesome.At this time,The international IP address assignment agency

[DNS Security] DNS rebinding attack

I have understood this attack for a long time and do not understand what it means to "rebind. After A little understanding, I found that the attack principle is literal. Refresh the DNS A record and bind it to another address. In the following section, I reference the note of a fairy "To mount a DNS rebinding attack, the attacker need onlyRegister a domain name, such as attacker.com, and attractWeb tra defa

On DNS architecture: One of the DNS series

DNS is currently one of the most indispensable servers on the Internet, and every day we surf the web with the help of DNS. The DNS server can resolve the domain name for us, locate the e-mail server, and locate the domain controller in the domain ... In the face of such an important server role, we need to do some in-depth research, this article tries to explore

How can I modify the dns of win7 system? Detailed explanation of dns settings on Windows 7

What is DNS DNS (domain Name System, name Systems), a distributed database that maps to each other as domain names and IP addresses on the Internet, makes it easier for users to access the Internet without remembering the number of IP strings that can be read directly by the machine. The process by which the host name corresponds to the IP address is called Domain name resolution (or host name resolution).

What is the role of DNS? Why you must configure DNS to surf the internet

Transferred from: http://www.office68.com/computer/14231.html DNS is the abbreviation for the domain Name System and is a core service of the Internet as a distributed database that maps domain names and IP addresses to each other, making it easier for people to access the Internet without remembering the number of IP strings that can be read directly by the machine. This is also the official statement of DNS

Three. master-slave DNS and DNS-related configuration

# # # #三-Master DNS DNS Encryption # # # #1. Configuration of master-slave DNS1) Configure two DNS servers.2) where the DNS server is configured as follows:Vim/etc/named.rfc1912.zones---------------------------------------Zone "Westos.com" in {Slave type;Masters {172.25.254.100;};The file "Slaves/westos.com.zone";allow

DNS Article 7 DNS Log System

Use bind, dlz, and MySQL to build intelligent DNS. The DNS data can be put into MySQL. Yum list all | grep BIND contains an SDB package. You can also put our data in the database. How can I enable the DNS log function? It is not recommended to enable the log function. If the log function is enabled, the DNS performan

A rejected error occurs when a DNS host (A) or alias (CNAME) record is manually added in DNS Manager

Problem phenomenon:AD The domain controller operating system is WIN2008R2, and a rejected error occurs when a DNS host (A) or alias (CNAME) record is manually added in DNS Manager. However, after you join the client to the domain, you can see the DNS host (A) record for the corresponding client in DNS Manager. In the s

DNS details and advanced applications in linux

DNS: domainnamesystem recursive query: you can obtain the final result iterative query after a query: you need to perform multiple queries to obtain the final result. Generally, the application method on the Internet is local recursion, partial Internet iteration. All DNS do not know where the other DNS is, but all kno

DNS resolution failure

complete, the website will be automatically parsed Based on the Intranet or Internet.DNS query DNS query can be interpreted in two ways: one is to query the resource records (such as a record) on the specified DNS server, and the other is to query the resolution process of the fqdn name. I. query resource records on the DNS server On Windows, you can use the com

DNS principle and parsing process analysis (text) _dns server

root prompted, the result is returned to the local DNS server, which is then returned to the client.The client to the local DNS server is a recursive query, and the interactive query between DNS servers is the iterative query. Appendix:Local DNS configuration forwarding an

Configure the DNS service in Liunx and the DNS service in Liunx

Configure the DNS service in Liunx and the DNS service in Liunx When you Ping the host name, you can map the IP address of the host, and vice versa. Configure and specify the DNS server to quickly deploy the cluster. You do not need to modify the HOSTS file on each host to resolve the IP address and host name. In Linux, DNS

The tplink router prevents ISP hijacking of DNS and manually sets the DNS of the TP-link router.

I don't know where you are. Anyway, I have a place called the ISP bandwidth service provider, Dr. Peng ... As the original credulous landlord said the legendary telecommunications plus the Great Wall Broadband dual service, the last to pull the landlord's net. As a result, I have never encountered my own IP address is telecommunications. Dr. Peng has always been the bar called the Great Wall broadband. I'm going to go oh ~ ~Always hijack my DNS, and,

How does one change the Dns of a MacBook? How to change the dns of MacBook

First step, add the DNS configuration file 1. As shown in our Mac OS preferences, we found the "network" click into. 2. Now pop up the network window we can set up DNS, I here to cable as an example. 3. Then we click "Edit Position" to enter, as shown in the following figure. 4. In the pop-up dialog we click the "+" button, and then a new location of the network configuration file. I'll change it

How to modify DNS Win8 specific steps to modify DNS server addresses diagram

In network optimization and network security protection, we may need to use to modify the DNS server address, the next small series to share with you how to modify the DNS address, here to the current WIN8 system as an example, teach you how to modify the computer DNS address, the need for friends may wish to refer to. How to modify

In-depth DNS Principle

the DNS server of the test.com.cn domain at the location where the query should continue.Www.test.com.cnThe requirements will be found at the DNS server of the test.com.cn domainWww.test.com.cnThe IP address of the host. Step 10 is the DNS server that originally issued the query requirements. After receiving the IP address of the query result, the server retur

Build a DNS server by yourself

: Mail eXchanger, Mail eXchanger; 5. DNS configuration file Main configuration file:/etc/named. conf Or include other files set by "include; /Etc/named. iscdlv. key /Etc/named. rfc1912.zones /Etc/named. root. key Parse library file: /Var/named/directory; The general name is ZONE_NAME.zone. 6. DNS testing tools Dig command: Dig [-t RR_TYPE] name [@ SERVER] [query options] Used to test the

Advanced use of DNS, DNS subdomain authorization, split separation parsing

Experiment (I.)Experimental requirements: Configure DNS servers on two hosts, respectivelyExperimental Purpose:1. Do the authorization of the Bj.tarena.comDNS subdomain on the tarena.com.The 2.bj.tarena.com subdomain forwards the parent domain.Experimental environmentHost name FXHLJ IP address 192.168.1.20 responsible for parsing of the tarena.com domainWww.tarena.com 192.168.1.100Host name localhost IP address is 192.168.1.30 responsible for parsing

Use the Net: dns cpan module to simulate a DNS cname response record

Install net: DNS Module Perl-mcpan-e "Install net: DNS" Script Simulation #!/usr/bin/perluse Net::DNS::Nameserver;use strict;use warnings;sub reply_handler { my ($qname, $qclass, $qtype, $peerhost,$query,$conn) = @_; my ($rcode, @ans, @auth, @add); print "Received query from $peerhost to ". $conn->{"sockhost"}. "\n"; $query->print; if ($qtyp

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