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That means any packet sent to any of those addresses is looped back. The address 127.0.0.1 is the standard address for IPv4 loopback traffic; the rest are not supported by all operating systems. However, they can be used to set up multiple server applications on the host, all listening on the same port number.
The name localhost is a commonly defined hostname for the loopback interface in most TCP/IP systems, resolving to the IP addresses 127.0.0.1 in IPv4 and ::1 for IPv6.As a top-level domain, the name has traditionally been defined statically in host DNS implementations with address records (A and AAAA) pointing to the same loopback addresses.
The hack alters the proxy server address settings to redirect web access requests back to the computer's own internal LAN address, 127.0.0.1, effectively cutting the computer off from access to the internet. Its origin and method of propagation are currently unknown.
127.0.0.1 localhost loopback ::1 localhost This example only contains entries for the loopback addresses of the system and their host names, a typical default content of the hosts file. The example illustrates that an IP address may have multiple host names ( localhost and loopback ), and that a host name may be mapped to both IPv4 and IPv6 IP ...
The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.
In Linux a program may specify 0.0.0.0 as the remote address to connect to the current host (AKA localhost). [2] Other non-standard uses.
Well-known URIs are Uniform Resource Identifiers defined by the IETF in RFC 8615. [1] They are URL path prefixes that start with /.well-known/.This implementation is in response to the common expectation for web-based protocols to require certain services or information be available at URLs consistent across servers, regardless of the way URL paths are organized on a particular host.
Zero-configuration networking (zeroconf) is a set of technologies that automatically creates a usable computer network based on the Internet Protocol Suite (TCP/IP) when computers or network peripherals are interconnected.