Question: What Is The Difference Between An A Record And A PTR Record?

What is the A record in DNS?

What is a DNS A record.

The ‘A’ stands for ‘address’ and this is the most fundamental type of DNS record, it indicates the IP address of a given domain.

For example if you pull the DNS records of google.com, the ‘A’ record currently returns an IP address of: 172.217.

5.78..

How does PTR record work?

While the main purpose of the Domain Name System is to point domains to IP addresses, a PTR record works in the opposite way – it associates an IP with a domain name. Because of its purpose, a PTR record is sometimes called Reverse DNS Record. … One PTR record can be configured per IP, linking that IP to a single domain.

What is an A record?

An A record is a type of DNS record that allows the address of a computer to be found using its hostname. The “A” in “A record” stands for address. … Your A record allows these DNS servers to have the IP address that corresponds to your domain name.

Can a Cname record point to an IP address?

A CNAME record must always point to another domain name and never directly to an IP address. A CNAME record cannot co-exist with another record for the same name.

What does PTR record stand for?

A pointer (PTR) record is a type of Domain Name System (DNS) record that resolves an IP address to a domain or host name, unlike an A record which points a domain name to an IP address. PTR records are used for the reverse DNS lookup. … An A record should exist for every PTR record.

How long does it take for a PTR record to propagate?

24 hoursThe general rule is propagation takes 24 hours to complete worldwide. However, in some cases, this can take up to 48 hours, depending on DNS record TTLs.

Do I need a PTR record?

You need a PTR record because many mail servers will reject email that comes from a mail server without one. After all, the goal is to keep the spam out of your inbox.

What should my PTR record be?

PTR records are used for the Reverse DNS (Domain Name System) lookup. Using the IP address you can get the associated domain/hostname. An A record should exist for every PTR record. The usage of a reverse DNS setup for a mail server is a good solution.

How do I create a PTR record?

To create the PTR Record:Add a new PTR record. … For the Canonical Hostname, enter the domain you’d like the IP address to resolve. … After you’ve saved your file zone, allow time for the change before validating the new reverse DNS record.

Where do I put PTR record?

Adding a PTR record to an IPv4 addressIn the menu bar, go to section “Dedicated & Bare Metal” and select “All servers”.The overview of Dedicated & Bare Metal servers is displayed.Click the IP address for the server hosting pack to which you want to add the PTR record.More items…

How do I check my PTR record with Dig?

4. Reverse DNS Lookup. We can use the dig command to perform a reverse DNS lookup, that is we can query an IP address and find the domain name that it points to by querying the PTR record. This is done by using the -x option followed by the IP address to query.

Can an A record point to another domain?

CNAME records must point to another domain name, never to an IP address. A hostname defined in a CNAME record must have no other resource records of other types (MX, A, etc.), except for DNSSEC records like RRSIG and NSEC.

What is A and AAAA record?

An AAAA record maps a domain name to the IP address (Version 6) of the computer hosting the domain. An AAAA record is used to find the IP address of a computer connected to the internet from a name. … As with the A records, you can use multiple AAAA records for the same domain in order to provide redundancy.

Can an A record point to two IP addresses?

In either mode, a DNS A record must be defined with more than one IP address (known as DNS A record failover). The first IP address should point to the default, production server, and the other IP addresses should point to identical (or frequently synchronized) redundant servers.