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(Новая: Reverse DNS (Domain Name System) lookup, also identified by the acronym (rDNS), is the approach by which someone can appear up a host name given a particular IP address. Reverse DNS is a...) |
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| − | Reverse DNS (Domain Name System) lookup, also | + | Reverse DNS (Domain Name System) lookup, also known by the acronym (rDNS), is the process by which an individual can appear up a host name given a particular IP address. Reverse DNS is also identified [http://www.oconnorscatholicsupply.com/lapel-pin-bookmarks-c-1_573_599.html ribbon bookmarks] in some areas as reverse resolving. It is the opposite of DNS lookup, by which someone looks up an IP address given a particular host name.<br><br>Why use Reverse DNS?<br><br>A reverse DNS lookup is typically performed for troubleshooting purposes. Frequently, tools like a traceroute or a ping will do a reverse DNS lookup to establish the flow of traffic from one point to another. Yet another typical spot for reverse DNS lookup is when accessing a persons email. Many modern day email providers will do reverse DNS lookups to establish if an email was sent from a recognized spam address. Finally, [http://www.oconnorscatholicsupply.com/medal-of-st-benedict-p-8770.html investigate st benedict medal] reverse DNS can be utilised to make confident that there is [http://www.oconnorscatholicsupply.com/military-gifts-firefighter-c-1_559_565.html firefighter cross] a suitable relationship amongst the owner of a server and the owner of a domain name. This strategy, recognized as Forward Confirmed reverse DNS (FCrDNS) is utilized to put a stop to phishing websites and spammers.<br><br>What is IPv4 Reverse DNS lookup?<br><br>IPv4 Reverse DNS is a variety of reverse DNS that uses a reverse IN-ADDR entry with the unique domain in-addr.arpa. The IP address represented in the in-addr.arpa domain is written in reverse order to the usual way that the IP address is written. For instance, if a person was performing a reverse domain lookup for an address such as 192.168.1.1, he would do the lookup using 1.1.168.192.in-addr.arpa.<br><br>What is IPv6 Reverse DNS lookup?<br><br>IPv6 Reverse DNS lookup is a variety of reverse DNS that makes use of the unique domain ip6.arpa. Unlike IPv4 Reverse DNS lookup, IPv6 Reverse DNS lookup does not use the standard IP address style of looking up host names. As an alternative, it utilizes a sequence of nibbles, or four bit aggregations, in reverse order with every number separated by a period. For example, if a person was performing a reverse domain lookup for an address such as 2001:0db8:::::1428:57ab he would do the lookup utilizing b.a.7.five.8.two.four.1.....8.b.d..1...2.ip6.arpa.<br><br>What happens when there are several host names assigned to a single IP address?<br><br>A reverse DNS lookup will be in a position to figure out all of the host names associated with a specific IP address, although this practice is often frowned upon. Numerous inexpensive web hosting plans will offer you shared virtual hosts exactly where several internet sites share space on the same IP address. Even though this does not affect the validity of the data returned by a reverse DNS lookup, it can lead to issues with other services. |
Версия 18:13, 2 июня 2012
Reverse DNS (Domain Name System) lookup, also known by the acronym (rDNS), is the process by which an individual can appear up a host name given a particular IP address. Reverse DNS is also identified ribbon bookmarks in some areas as reverse resolving. It is the opposite of DNS lookup, by which someone looks up an IP address given a particular host name.
Why use Reverse DNS?
A reverse DNS lookup is typically performed for troubleshooting purposes. Frequently, tools like a traceroute or a ping will do a reverse DNS lookup to establish the flow of traffic from one point to another. Yet another typical spot for reverse DNS lookup is when accessing a persons email. Many modern day email providers will do reverse DNS lookups to establish if an email was sent from a recognized spam address. Finally, investigate st benedict medal reverse DNS can be utilised to make confident that there is firefighter cross a suitable relationship amongst the owner of a server and the owner of a domain name. This strategy, recognized as Forward Confirmed reverse DNS (FCrDNS) is utilized to put a stop to phishing websites and spammers.
What is IPv4 Reverse DNS lookup?
IPv4 Reverse DNS is a variety of reverse DNS that uses a reverse IN-ADDR entry with the unique domain in-addr.arpa. The IP address represented in the in-addr.arpa domain is written in reverse order to the usual way that the IP address is written. For instance, if a person was performing a reverse domain lookup for an address such as 192.168.1.1, he would do the lookup using 1.1.168.192.in-addr.arpa.
What is IPv6 Reverse DNS lookup?
IPv6 Reverse DNS lookup is a variety of reverse DNS that makes use of the unique domain ip6.arpa. Unlike IPv4 Reverse DNS lookup, IPv6 Reverse DNS lookup does not use the standard IP address style of looking up host names. As an alternative, it utilizes a sequence of nibbles, or four bit aggregations, in reverse order with every number separated by a period. For example, if a person was performing a reverse domain lookup for an address such as 2001:0db8:::::1428:57ab he would do the lookup utilizing b.a.7.five.8.two.four.1.....8.b.d..1...2.ip6.arpa.
What happens when there are several host names assigned to a single IP address?
A reverse DNS lookup will be in a position to figure out all of the host names associated with a specific IP address, although this practice is often frowned upon. Numerous inexpensive web hosting plans will offer you shared virtual hosts exactly where several internet sites share space on the same IP address. Even though this does not affect the validity of the data returned by a reverse DNS lookup, it can lead to issues with other services.
