It is typically not as critical in as forward DNS – visitors will still reach your web-site just fine without any reverse DNS for your web-server IP or the visitor’s IP.
However reverse DNS is important for one particular application.
Why do we need reverse DNS lookup?
Reverse DNS Lookup. DNS is typically used to resolve a domain name to an IP address. This act is known as a forward resolution and enacted every time you visit a site on the internet. Reverse DNS (rDNS), as its name implies, is a method of resolving an IP address to a domain name.
Do you need reverse lookup zone DNS?
You need reverse DNS to match IP Addresses to Host Names. You don’t need to set up another DNS server for reverse lookup, your existing DNS server should be configured to do it – i.e. if it doesn’t exist, create a Reverse Lookup Zone.
How do I setup reverse DNS?
Create a PTR record within your reverse DNS domain.
- Step 1: Request Zone from ISP. First, you need to obtain the IP address of your mail server.
- Step 2: Request Reverse DNS Delegation.
- Step 3: Create Reverse DNS Domain.
- Step 4: Create PTR Record.
What is reverse IP lookup?
What is a Reverse IP Lookup? The technique known as Reverse IP Lookup is a way to identify hostnames that have DNS (A) records associated with an IP address. A web server can be configured to server multiple virtual hosts from a single IP address. This is a common technique in shared hosting environments.