DNS Search
Free DNS Management
How Does DNS Work?
It works with servers called DNS servers located in various parts of the world. This system makes a connection between the domain name and the IP address without you are aware of it.
How to query DNS?
You can use the DNS Query section to find the DNS records of any website.
DNS Search
DNS Records
DNS records are sets of information that describe the name of a domain. These records are what your DNS provider offers you to manage your domain.What are the DNS record types;
SOA, A, CNAME, NS, MX, PTR, AAAA, TXT
SOA, A, CNAME, NS, MX, PTR, AAAA, TXT
DNS Record management
It is the process that allows you to update your DNS records. DNS settings are usually organized in the server control panel, in general you only need to update DNS records when you change your servers or web host.
Measures to take against DNS queries
DNS information is important information. When setting up DNS servers very little information should be given about the system. When naming the server, a name that evokes the operating system should not be used. In addition, the space related to the operating system used should be left blank.
Firewall should be used or attention should be paid to port status on routers on gateways to prevent unauthorized connections. DNS, port 53 with UDP; Precautions should be taken against Zone Transfer using TCP and port 53. These ports should be closed against unauthorized connections.
To use a separate DNS server for the network and the internet separately. If the user wants to go to the internet, the internal DNS server obtains this request and acts as a proxy server and forwards the request to the external DNS server. So someone out of the network can only access names in the external DNS.
Firewall should be used or attention should be paid to port status on routers on gateways to prevent unauthorized connections. DNS, port 53 with UDP; Precautions should be taken against Zone Transfer using TCP and port 53. These ports should be closed against unauthorized connections.
To use a separate DNS server for the network and the internet separately. If the user wants to go to the internet, the internal DNS server obtains this request and acts as a proxy server and forwards the request to the external DNS server. So someone out of the network can only access names in the external DNS.
What is DNS Resolver?
The DNS resolver is the first stop in the DNS search and is responsible for dealing with the client who makes the first request. The resolver initiates the query sequence that ultimately results in a URL being transferred to the required IP address.
Advanced DNS Searches
Onward search or simple DNS search is the most commonly used approach to DNS. The advanced approach to DNS is to find the IP address of a domain. People have difficulties in remembering long sequences of numbers. Instead, a domain name containing of words is easier to remember. However, electronic devices use flows of 1s and 0s to communicate. The only way to communicate one computer with another is unique identification. The method definition used on the Internet is realized according to IP addresses.
Here are the simple steps for DNS resolution:
A user enters a domain name in their Internet browser (atakdomain.com/ip-sorgulama).
The computer sends the domain name to the user’s Internet Service Provider (ISP) as a DNS request.
The ISP determines whether it has the IP address associated with that name;
If not, the ISP forwards the request to other providers to find the DNS record containing the data.
When the record is found, the IP address of the domain is returned to the user.
Now the user’s computer can communicate directly with the server.
Many people compare DNS to a “phonebook”, which is an oversimplification of a very complex system.
Here are the simple steps for DNS resolution:
Many people compare DNS to a “phonebook”, which is an oversimplification of a very complex system.
DNS Protocol
The DNS protocol uses two types of DNS messages, such as queries and replies. Both queries and answers consist of a header and four parts: question, answer, authorization, and an additional field:
The Header section, contains the Definition used to match the responses to the queries; Flags; Number of questions; number of answers; number of authorized resource records (RRs); and Number of additional resource records.
The flag section, contains one or four-bit segments that indicate whether the message is a query or a reply; if the current packet is a response, a status, or a request; whether the DNS server is authoritative; whether the client wants to send a recursive query (“RD”); whether the DNS server supports recursion; whether the request was interrupted (“TC”); and finally the four bits indicating the status.
The question section, contains the domain name and record type being resolved (A, AAAA, MX, TXT, etc.). The domain name is divided into tags and each tag is preceded by the length of that tag.
The answer section, includes resource records of the queried name. If a domain name has multiple IP addresses associated with it, it can appear in multiple records.
Protocol Transport
DNS primarily uses the User Datagram Protocol (UDP) on port 53 to serve requests. DNS queries consist of a single UDP request from the client followed by a single UDP response from the server. Transmission Control Protocol (TCP) is used when the response data size exceeds 512 bytes or for zone transfers. Some DNS resolvers use TCP for all communication.
Frequently Asked Questions
What is DNS Briefly: DNS is the abbreviation of Domain Name System. Its Turkish equivalent is known as Domain Naming System. In other words, we can call it the internet phone book. It converts easy-to-remember names (issimkayit.com) to IP addresses (1859.92.0.250)
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