What is Reverse DNS?
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| - | Reverse DNS (Domain Name Method) lookup, also | + | Reverse DNS (Domain Name Method) lookup, also identified by the acronym (rDNS), is the method by which an individual can look up [http://www.lostiemposfinales.com/read_blog/42971/what-is-reverse-dns? crimes against children examples investigation] a host name given a distinct IP address. Reverse DNS is also known in some places as reverse resolving. It is the opposite of DNS lookup, by which an individual looks up an IP address given a distinct host name.<br><br>Why use Reverse DNS?<br><br>A reverse DNS lookup is usually performed for troubleshooting purposes. Commonly, tools like a traceroute or a ping will do a reverse DNS lookup to determine the flow of traffic from one particular point to an additional. Yet another widespread place for reverse DNS lookup is when accessing a persons e mail. Many modern e-mail providers will do reverse DNS lookups to decide if an email was sent from a known spam address. Lastly, reverse DNS can be employed to make sure that there is a suitable relationship amongst the owner of a server and the owner of a domain name. This approach, identified as Forward Confirmed reverse DNS (FCrDNS) is employed to place a quit to phishing internet sites and spammers.<br><br>What is [http://amazingplacestovisit.com/read_blog/94464/what-is-reverse-dns? the san diego criminal lawyer] IPv4 Reverse DNS lookup?<br><br>IPv4 Reverse DNS is a sort 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 example, if a person was performing a reverse domain lookup for an address such as 192.168.1.1, he would do the lookup utilizing 1.1.168.192.in-addr.arpa.<br><br>What is IPv6 Reverse DNS lookup?<br><br>IPv6 Reverse DNS lookup is a kind of reverse DNS that makes use of the particular domain ip6.arpa. In contrast to IPv4 Reverse DNS lookup, IPv6 Reverse DNS lookup does not use the regular IP address style of hunting up host names. Instead, it utilizes a sequence of nibbles, or 4 bit aggregations, in reverse order with every quantity 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 using b.a.7.5.8.two.4.1.....8.b.d..1...two.ip6.arpa.<br><br>What occurs when there are multiple host names assigned to a single IP address?<br><br>A reverse DNS lookup will be able to figure out all of the host names associated with a specific IP address, even though this practice is sometimes frowned upon. A lot of low-cost net hosting plans will offer you shared virtual hosts exactly [http://kurddrama.info/read_blog/61652/what-is-reverse-dns? subpoena witness rights] where many internet sites share space on the identical IP address. Though this does not impact the validity of the data returned by a reverse DNS lookup, it can lead to issues with other services. |
2012年8月26日 (日) 16:15の版
Reverse DNS (Domain Name Method) lookup, also identified by the acronym (rDNS), is the method by which an individual can look up crimes against children examples investigation a host name given a distinct IP address. Reverse DNS is also known in some places as reverse resolving. It is the opposite of DNS lookup, by which an individual looks up an IP address given a distinct host name.
Why use Reverse DNS?
A reverse DNS lookup is usually performed for troubleshooting purposes. Commonly, tools like a traceroute or a ping will do a reverse DNS lookup to determine the flow of traffic from one particular point to an additional. Yet another widespread place for reverse DNS lookup is when accessing a persons e mail. Many modern e-mail providers will do reverse DNS lookups to decide if an email was sent from a known spam address. Lastly, reverse DNS can be employed to make sure that there is a suitable relationship amongst the owner of a server and the owner of a domain name. This approach, identified as Forward Confirmed reverse DNS (FCrDNS) is employed to place a quit to phishing internet sites and spammers.
What is the san diego criminal lawyer IPv4 Reverse DNS lookup?
IPv4 Reverse DNS is a sort 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 example, if a person was performing a reverse domain lookup for an address such as 192.168.1.1, he would do the lookup utilizing 1.1.168.192.in-addr.arpa.
What is IPv6 Reverse DNS lookup?
IPv6 Reverse DNS lookup is a kind of reverse DNS that makes use of the particular domain ip6.arpa. In contrast to IPv4 Reverse DNS lookup, IPv6 Reverse DNS lookup does not use the regular IP address style of hunting up host names. Instead, it utilizes a sequence of nibbles, or 4 bit aggregations, in reverse order with every quantity 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 using b.a.7.5.8.two.4.1.....8.b.d..1...two.ip6.arpa.
What occurs when there are multiple host names assigned to a single IP address?
A reverse DNS lookup will be able to figure out all of the host names associated with a specific IP address, even though this practice is sometimes frowned upon. A lot of low-cost net hosting plans will offer you shared virtual hosts exactly subpoena witness rights where many internet sites share space on the identical IP address. Though this does not impact the validity of the data returned by a reverse DNS lookup, it can lead to issues with other services.
