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!!! Overview
[{$pagename}] is [127.0.0.1] on the [local device].
[{$pagename}] is a [hostname] that means this computer.
[{$pagename}] is used to access the network services that are running on the host via its [loopback] network interface. Using the [loopback] interface bypasses any [local Area Network] interface hardware.
The local [loopback] mechanism is useful for testing software during development, independently of any networking configurations.
For example, if a computer has been configured to provide a website, directing a locally running web browser to [http://localhost|http://localhost|target='_blank'] may display [{$pagename}] home page.
On most computer systems, [{$pagename}] resolves to the [IP] address [127.0.0.1], which is the most commonly used [IPv4] [loopback] address, and to the [IPv6] [loopback] address ::1.[1]
[{$pagename}] is also a reserved [Top-Level Domain] name, set aside to avoid confusion with the definition as a hostname. The [IETF] standards restrict domain name registrars from assigning the name [{$pagename}] in registration procedures. ([RFC 6761])
The resolution of the name [{$pagename}] into one or more [IP Address] is configured by the following lines in the [Operating System]'s hosts file:
%%prettify
{{{
127.0.0.1 localhost
::1 localhost
}}} /%
[{$pagename}] may be mapped to other [IPv4] [loopback] addresses, and additional names may be assigned to any [loopback] address.
!! [Security Considerations]
Any [IP] [datagram] with a source or destination address set to a [loopback] address must not appear outside of a computing system, or be routed by any routing device. Packets received on an interface with a [loopback] destination address [MUST] be dropped. Such packets are sometimes referred to as [Martian packets].[7] As with other bogus packets, they may be malicious and any problems they might cause can be avoided by applying bogon filtering.
!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
----
* [#1] - [Localhost|Wikipedia:Localhost|target='_blank'] - based on information obtained 2017-07-17-
This page (revision-1) was last changed on 29-Nov-2024 16:16 by UnknownAuthorTop