{"id":3602,"date":"2021-12-06T10:52:29","date_gmt":"2021-12-06T10:52:29","guid":{"rendered":"https:\/\/ownwebservers.com\/kb\/?p=3602"},"modified":"2021-12-06T10:52:29","modified_gmt":"2021-12-06T10:52:29","slug":"what-is-reverse-dns-and-how-does-it-work","status":"publish","type":"post","link":"https:\/\/ownwebservers.com\/kb\/what-is-reverse-dns-and-how-does-it-work\/","title":{"rendered":"What is Reverse DNS and How Does it Work?"},"content":{"rendered":"<p>In this article we are going to learn what reverse DNS is and how it works.<\/p>\n<p>Reverse DNS (rDNS) is the method of resolving an IP address to a domain name, which is the inverse of a forward DNS query.<\/p>\n<p>What is Reverse DNS?<\/p>\n<p>A DNS operation of a website name from an IP address is know as reverse DNS. rDNS resolves an IP address from a domain name, however standard DNS performs the inverse, therefore the term reverse. For reverse DNS lookups PTR records are used . To configure pointer records, Address and Routing Parameter Area (in-addr.arpa) domains are used. A reverse DNS operation fails if no PTR record is configured.<\/p>\n<p>What is the Process of Reverse DNS Lookup?<\/p>\n<p>For a pointer record (PTR), Reverse DNS works by querying DNS servers. To the host\u2019s canonical name, a PTR record links an IPv4 or IPv6 address. If there is no PTR record on the server, a reverse lookup cannot be resolved .<\/p>\n<p>PTR records are accustomed hold reverse DNS entries, that have their IP address reversed and also to every record have the suffix.in-addr.arpa connected. PTR, as an example, records the IP address 198.15.93.98 as 98.93.15.198.in-addr.arpa, that points back to the designated host name.<\/p>\n<p>It is essential to place up a good reverse DNS record (PTR), particularly when operating an SMTP\/mail server.<\/p>\n<h4><strong>What is reverse DNS and how can you\u00a0do it?<\/strong><\/h4>\n<p>Reverse DNS lookup may be done in a variety of ways:<\/p>\n<ul>\n<li><strong>Use the command prompt in Windows:\u00a0<\/strong>Utilize the nslookup command to do a manual rDNS lookup on Windows.<\/li>\n<\/ul>\n<ul>\n<li><strong>Use the command prompt in Linux:\u00a0<\/strong>The dig command with the -x parameter enables manual rDNS lookups. Alternatively, the host command may be used.<\/li>\n<\/ul>\n<ul>\n<li><strong>Use lookup tools for rDNS records:\u00a0<\/strong>rDNS lookup is available via a number of tools.<\/li>\n<\/ul>\n<p>Command for Reverse DNS Lookup<\/p>\n<p>This section, Manual reverse DNS lookup on Windows or Linux is covered.<\/p>\n<p><strong>In Windows, you may do a reverse DNS lookup.<\/strong><\/p>\n<p>In Windows, the reverse DNS lookup command is:<\/p>\n<pre class=\"wp-block-code\"><code>nslookup [ip_address]<\/code><\/pre>\n<p>For example :<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-3603\" src=\"https:\/\/ownwebservers.com\/kb\/wp-content\/uploads\/2021\/12\/dns-add-1-300x57.png\" alt=\"dns-add-1\" width=\"547\" height=\"104\" srcset=\"https:\/\/ownwebservers.com\/kb\/wp-content\/uploads\/2021\/12\/dns-add-1-300x57.png 300w, https:\/\/ownwebservers.com\/kb\/wp-content\/uploads\/2021\/12\/dns-add-1.png 547w\" sizes=\"auto, (max-width: 547px) 100vw, 547px\" \/><\/p>\n<p>The domain name for the specified IP address is returned in the output.<\/p>\n<p>The command produces an error if the website does not have rDNS set up. Consider the following scenario:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-3604\" src=\"https:\/\/ownwebservers.com\/kb\/wp-content\/uploads\/2021\/12\/dns-add-2-300x49.png\" alt=\"dns-add-2\" width=\"558\" height=\"92\" srcset=\"https:\/\/ownwebservers.com\/kb\/wp-content\/uploads\/2021\/12\/dns-add-2-300x49.png 300w, https:\/\/ownwebservers.com\/kb\/wp-content\/uploads\/2021\/12\/dns-add-2.png 558w\" sizes=\"auto, (max-width: 558px) 100vw, 558px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article we are going to learn what reverse DNS is and how it works. Reverse DNS (rDNS) is the method of resolving an IP address to a domain name, which is the inverse of a forward DNS query. What is Reverse DNS? A DNS operation of a website name from an IP address [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-3602","post","type-post","status-publish","format-standard","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v15.2.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Reverse DNS and How Does it Work? - OWS KB<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ownwebservers.com\/kb\/what-is-reverse-dns-and-how-does-it-work\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Reverse DNS and How Does it Work? - OWS KB\" \/>\n<meta property=\"og:description\" content=\"In this article we are going to learn what reverse DNS is and how it works. Reverse DNS (rDNS) is the method of resolving an IP address to a domain name, which is the inverse of a forward DNS query. What is Reverse DNS? 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