{"id":815,"date":"2008-07-31T16:35:26","date_gmt":"2008-07-31T16:35:26","guid":{"rendered":"https:\/\/www.amitbhawani.com\/blog\/?p=815"},"modified":"2008-07-26T16:38:17","modified_gmt":"2008-07-26T16:38:17","slug":"reverse-dns","status":"publish","type":"post","link":"https:\/\/www.amitbhawani.com\/blog\/reverse-dns\/","title":{"rendered":"What is The Reverse DNS"},"content":{"rendered":"

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 make your IP addresses will let you know how to change your reverse DNS PTR records. As a substitute to this option, a range of IP addresses may be delegated to you by the company in which reverse DNS and PTR records will have to be configured by you to your DNS server. <\/p>\n

Now the question arises that whether the reverse DNS is necessary or not?<\/p>\n

At times some inexperience administrator configures the forward DNS and become less careful about configuring the reverse DNS which to some extent work nicely. Internet browsing is at a terrific speed but this will not be all that a good option because the rest might become workless. Internet protocol and some extensions of other internet protocol need the reverse DNS. So without acquiring Reverse DNS may cause many problems. Some most enterprise management systems, SMTP servers, IRC, and much network backup system can be badly affected by reverse DNS undone. So the correct configuration of the reverse DNS on the right time needs to be ensured right from the way it goes. <\/p>\n

Going back in the history suggests that the allocation of the IP addresses was made in the blocks of 256 each falling upon an octet boundary. The delimitation of each block by the dot separators made the configuration of the IP record lot more comfortable. Nowadays the ancient way of names server\u2019s configuring to perform the reverse DNS will not work. This problem was handled by the division of RFC 2317 that used CNAMES to correspond to each block. Despite being legally acceptable to have different PTR records, most of the DNS entries have yet one PTR record and rightly so. Having too many PTR records on one IP address without any need is not appropriate too. <\/p>\n

Having too many PTR records can cause some problems. At first that makes the DNS<\/a> packet to be too large and then of course the programs that always expect only one PTR record to come. Some other records of fewer standards such as TXT record and the LOC record can also be kept in the DNS tree.<\/p>\n","protected":false},"excerpt":{"rendered":"

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 make your IP addresses will […]<\/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":["post-815","post","type-post","status-publish","format-standard","category-what-is","entry"],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":4815,"url":"https:\/\/www.amitbhawani.com\/blog\/what-is-reverse-dns\/","url_meta":{"origin":815,"position":0},"title":"Reverse DNS Information – DNS Lookup Tools","author":"Amit Bhawani","date":"June 18, 2009","format":false,"excerpt":"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\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":815,"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":7462,"url":"https:\/\/www.amitbhawani.com\/blog\/how-to-setup-google-public-dns-in-windows-mac-os-linux\/","url_meta":{"origin":815,"position":2},"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":6146,"url":"https:\/\/www.amitbhawani.com\/blog\/how-to-flush-the-dns-cache\/","url_meta":{"origin":815,"position":3},"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":1336,"url":"https:\/\/www.amitbhawani.com\/blog\/public-dns-servers\/","url_meta":{"origin":815,"position":4},"title":"What are Public DNS servers?","author":"Amit Bhawani","date":"September 11, 2008","format":false,"excerpt":"Public DNS is basically a service provided by different companies relating to the internet. It is basically a way in which users can get a primary as well as a secondary DNS free of charge. All you have to do is ask! The special service makes use of UPS protected\u2026","rel":"","context":"In "Tips & Tweaks"","block_context":{"text":"Tips & Tweaks","link":"https:\/\/www.amitbhawani.com\/blog\/category\/tips-tweaks\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":760,"url":"https:\/\/www.amitbhawani.com\/blog\/microsoft-dns\/","url_meta":{"origin":815,"position":5},"title":"What is Microsoft DNS","author":"Amit Bhawani","date":"July 25, 2008","format":false,"excerpt":"In Microsoft window operating system the implementations of domain name system are given the name of \u201cMicrosoft DNS\u201d. Two clients and a server are comprised by its derivatives window 2000, windows XP and windows 2003 as the domain name system supports Microsoft windows NT. 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