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Diffstat (limited to 'man7/network_namespaces.7')
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diff --git a/man7/network_namespaces.7 b/man7/network_namespaces.7 new file mode 100644 index 0000000..a9e6306 --- /dev/null +++ b/man7/network_namespaces.7 @@ -0,0 +1,62 @@ +.\" Copyright (c) 2017 by Michael Kerrisk <mtk.manpages@gmail.com> +.\" +.\" SPDX-License-Identifier: Linux-man-pages-copyleft +.\" +.\" +.TH network_namespaces 7 2023-03-12 "Linux man-pages 6.05.01" +.SH NAME +network_namespaces \- overview of Linux network namespaces +.SH DESCRIPTION +Network namespaces provide isolation of the system resources associated +with networking: network devices, IPv4 and IPv6 protocol stacks, +IP routing tables, firewall rules, the +.I /proc/net +directory (which is a symbolic link to +.IR /proc/ pid /net ), +the +.I /sys/class/net +directory, various files under +.IR /proc/sys/net , +port numbers (sockets), and so on. +In addition, +network namespaces isolate the UNIX domain abstract socket namespace (see +.BR unix (7)). +.PP +A physical network device can live in exactly one +network namespace. +When a network namespace is freed +(i.e., when the last process in the namespace terminates), +its physical network devices are moved back to the +initial network namespace +(not to the namespace of the parent of the process). +.PP +A virtual network +.RB ( veth (4)) +device pair provides a pipe-like abstraction +that can be used to create tunnels between network namespaces, +and can be used to create a bridge to a physical network device +in another namespace. +When a namespace is freed, the +.BR veth (4) +devices that it contains are destroyed. +.PP +Use of network namespaces requires a kernel that is configured with the +.B CONFIG_NET_NS +option. +.\" FIXME .SH EXAMPLES +.SH SEE ALSO +.BR nsenter (1), +.BR unshare (1), +.BR clone (2), +.BR veth (4), +.BR proc (5), +.BR sysfs (5), +.BR namespaces (7), +.BR user_namespaces (7), +.BR brctl (8), +.BR ip (8), +.BR ip\-address (8), +.BR ip\-link (8), +.BR ip\-netns (8), +.BR iptables (8), +.BR ovs\-vsctl (8) |