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NAME | DESCRIPTION | SEE ALSO | COLOPHON |
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network...espaces(7) Miscellaneous Information Manualnetwork...espaces(7)
network_namespaces - overview of Linux network namespaces
Network namespaces provide isolation of the system resources
associated with networking: network devices, IPv4 and IPv6
protocol stacks, IP routing tables, firewall rules, the /proc/net
directory (which is a symbolic link to /proc/pid/net), the
/sys/class/net directory, various files under /proc/sys/net, port
numbers (sockets), and so on. In addition, network namespaces
isolate the UNIX domain abstract socket namespace (see unix(7)).
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).
A virtual network (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 veth(4) devices that it contains are destroyed.
Use of network namespaces requires a kernel that is configured
with the CONFIG_NET_NS option.
nsenter(1), unshare(1), clone(2), veth(4), proc(5), sysfs(5),
namespaces(7), user_namespaces(7), brctl(8), ip(8), ip-address(8),
ip-link(8), ip-netns(8), iptables(8), ovs-vsctl(8)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
[email protected]
Linux man-pages 6.15 2025-05-17 network...espaces(7)
Pages that refer to this page: nsenter(1), unshare(1), clone(2), lttng-ust(3), veth(4), proc_pid_net(5), systemd.socket(5), namespaces(7), rdma-system(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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