37 lines
733 B
Groff
37 lines
733 B
Groff
|
.Dd May 27, 2017
|
||
|
.Dt LO 4
|
||
|
.Os
|
||
|
.Sh NAME
|
||
|
.Nm lo
|
||
|
.Nd loopback network interface
|
||
|
.Sh SYNOPSIS
|
||
|
.Nm /dev/lo Ns Ar X
|
||
|
.Sh DESCRIPTION
|
||
|
.Nm
|
||
|
is a loopback network interface that receives what is sent on it, used for
|
||
|
communication within the local host.
|
||
|
.Nm
|
||
|
is implemented in software and the packets sent on it are not transmitted on the
|
||
|
network.
|
||
|
.Pp
|
||
|
The
|
||
|
.Xr kernel 7
|
||
|
creates the
|
||
|
.Sy lo0
|
||
|
network interface on boot and configures it with the
|
||
|
.Xr inet 4
|
||
|
address
|
||
|
.Dv 127.0.0.1
|
||
|
in the subnet
|
||
|
.Dv 127.0.0.0/8 .
|
||
|
Packets with source or destination outside this subnet are dropped.
|
||
|
.Sh SEE ALSO
|
||
|
.Xr kernel 7
|
||
|
.Sh CAVEATS
|
||
|
The default
|
||
|
.Xr inet 4
|
||
|
configuration
|
||
|
of the
|
||
|
.Sy lo0
|
||
|
network interface must not be changed or local loopback communication may fail.
|