The Domain Name Servers make Internet Protocol (IP) addresses into human-readable format such as \u201chttp:\/\/xyz.com\u201d. The DNS have a huge repository of all domains, linking them to their characteristic IP address. Thus, when we type in an address in the URL (Universal Resource Locator) bar of any browser, we are actually asking the DNS to link to the IP address of the website and accordingly the browser performs the functions required and links to the website with the networking layer.<\/p>\n
Reverse DNS<\/a> is the exact reverse of this process in which an IP address is converted to its human-readable format. It is an important tool in searching to the roots of a certain IP address that has your interest \u2013 that is it could be the IP address of a spammer who comments\/emails you absolute junk and you want to block him and want to know who he is. It is also necessitated by the fact that some hackers and crackers also leave vital IP\u2019s behind that can lead to their apprehension. Reverse DNS is also required in networks that use SMTP servers, express management systems and other tools of networking.<\/p>\n DNS lookup tools<\/a> are free to use by any internet user and have always been so, since the right to information is what the internet is all about. A simple command that is used in both DOS and Bash is the \u201cnslookup\u201d command. Simply type nslookup followed by the IP address<\/a> whose reverse DNS is needed and the output will be the desired web page\u2019s name.<\/p>\n Forward DNS works on A-records or \u201cAddress\u201d records, while Reverse DNS works on PTR or \u201cPointer\u201d records. Usually the ISP\u2019s do their own reverse DNS engineering before serving it to the consumers, but if the case may arise that some reverse DNS is needed by the computer network user he or she may use some freely available software to program the DNS servers to their choosing.<\/p>\n Reverse DNS engineering is as important as forward DNS engineering. The method of backward calls to IP addresses from many networking software require reverse DNS lookups which may fail or give invalid results if the reverse DNS is not properly configured. Although forward DNS is all that is necessary for internet web browsing, enterprise networks need a thorough backbone of reverse DNS for them to work properly. As troubleshooting reverse DNS problems are a headache, it pays to configure it properly the first time.<\/p>\n","protected":false},"excerpt":{"rendered":" The Domain Name Servers make Internet Protocol (IP) addresses into human-readable format such as \u201chttp:\/\/xyz.com\u201d. The DNS have a huge repository of all domains, linking them to their characteristic IP address. Thus, when we type in an address in the URL (Universal Resource Locator) bar of any browser, we are actually asking the DNS to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1280],"tags":[],"class_list":{"0":"post-4815","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-what-is","7":"entry"},"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":815,"url":"https:\/\/www.amitbhawani.com\/blog\/reverse-dns\/","url_meta":{"origin":4815,"position":0},"title":"What is The Reverse DNS","author":"Amit Bhawani","date":"July 31, 2008","format":false,"excerpt":"It is a contrast to forward DNS and set up by configuring pointer record in a particular DNS server. The forward DNS uses address records. While registering a domain name with a domain registrar one does have the responsibility for the forward DNS domain. The company that allows you to\u2026","rel":"","context":"In "What is Guide"","block_context":{"text":"What is Guide","link":"https:\/\/www.amitbhawani.com\/blog\/category\/what-is\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1340,"url":"https:\/\/www.amitbhawani.com\/blog\/perform-dns-lookup\/","url_meta":{"origin":4815,"position":1},"title":"How do I Perform a DNS lookup?","author":"Amit Bhawani","date":"September 11, 2008","format":false,"excerpt":"A DNS lookup will give you insight about any particular website. You will be able to access information regarding the owner of the website and other such things. Special ways have been developed in order to make this possible for the users. Below you will find the basics of performing\u2026","rel":"","context":"In "What is Guide"","block_context":{"text":"What is Guide","link":"https:\/\/www.amitbhawani.com\/blog\/category\/what-is\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":6146,"url":"https:\/\/www.amitbhawani.com\/blog\/how-to-flush-the-dns-cache\/","url_meta":{"origin":4815,"position":2},"title":"How to Flush the DNS Cache","author":"Amit Bhawani","date":"September 29, 2009","format":false,"excerpt":"Domain Name Server (DNS) names are the IP (Internet Protocol) addresses of the servers that have a very large repository of practically all the internet addresses inside their vaults. These servers handle the job of translating the normal plain English Universal Resource Locators (URL\u2019s) into their IP addresses so that\u2026","rel":"","context":"In "How to Guide"","block_context":{"text":"How to Guide","link":"https:\/\/www.amitbhawani.com\/blog\/category\/how-to\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":438,"url":"https:\/\/www.amitbhawani.com\/blog\/solutions-to-websites-not-loading-problems\/","url_meta":{"origin":4815,"position":3},"title":"Solutions to Websites not Loading Problems","author":"Amit Bhawani","date":"May 3, 2008","format":false,"excerpt":"This problem has recently increased a lot and many internet users have recently started complaining about some websites not opening on their computers and here are some solutions for the same. At times some websites like ebay, paypal, or any website stops loading and you get confused what may be\u2026","rel":"","context":"In "Tips & Tweaks"","block_context":{"text":"Tips & Tweaks","link":"https:\/\/www.amitbhawani.com\/blog\/category\/tips-tweaks\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2010\/12\/Wireless-Network-Connection.jpg?fit=369%2C453&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":7462,"url":"https:\/\/www.amitbhawani.com\/blog\/how-to-setup-google-public-dns-in-windows-mac-os-linux\/","url_meta":{"origin":4815,"position":4},"title":"How to Setup Google Public DNS in Windows, Mac OS & Linux","author":"Amit Bhawani","date":"December 3, 2009","format":false,"excerpt":"Configuring your network settings to use Google Public DNS When you use Google Public DNS, you are changing your DNS \"switchboard\" operator from your ISP to Google Public DNS. In most cases, the IP addresses used by your ISP's domain name servers are automatically set by your ISP via the\u2026","rel":"","context":"In "How to Guide"","block_context":{"text":"How to Guide","link":"https:\/\/www.amitbhawani.com\/blog\/category\/how-to\/"},"img":{"alt_text":"Google DNS Servers","src":"https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2009\/12\/Google-DNS-Servers.PNG?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":9617,"url":"https:\/\/www.amitbhawani.com\/blog\/access-website-before-dns-propagation\/","url_meta":{"origin":4815,"position":5},"title":"Access Website before Dns Propagation with Hosts File","author":"Amit Bhawani","date":"March 31, 2010","format":false,"excerpt":"There would be many different reasons because of which you would plan to change your Web Hosting company, most of the cases in which it would be regular downtimes, server configuration issues, upgradation requirements, need for higher bandwidth of space, need for a VPS or may be any other issue.\u2026","rel":"","context":"In "Ultimate Guides"","block_context":{"text":"Ultimate Guides","link":"https:\/\/www.amitbhawani.com\/blog\/category\/guides\/"},"img":{"alt_text":"How Internet Works","src":"https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2010\/03\/How-Internet-Works.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2010\/03\/How-Internet-Works.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2010\/03\/How-Internet-Works.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2010\/03\/How-Internet-Works.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.amitbhawani.com\/blog\/wp-content\/uploads\/2010\/03\/How-Internet-Works.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/posts\/4815","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/comments?post=4815"}],"version-history":[{"count":0,"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/posts\/4815\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/media?parent=4815"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/categories?post=4815"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.amitbhawani.com\/blog\/wp-json\/wp\/v2\/tags?post=4815"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}