network_namespaces(7) - Linux manual page (original) (raw)

network...espaces(7) Miscellaneous Information Manual_network...espaces_(7)

NAME top

   network_namespaces - overview of Linux network namespaces

DESCRIPTION top

   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)](../man7/unix.7.html)).

   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)](../man4/veth.4.html)) 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)](../man4/veth.4.html) devices that it contains are destroyed.

   Use of network namespaces requires a kernel that is configured
   with the **CONFIG_NET_NS** option.

SEE ALSO top

   [nsenter(1)](../man1/nsenter.1.html), [unshare(1)](../man1/unshare.1.html), [clone(2)](../man2/clone.2.html), [veth(4)](../man4/veth.4.html), [proc(5)](../man5/proc.5.html), [sysfs(5)](../man5/sysfs.5.html),
   [namespaces(7)](../man7/namespaces.7.html), [user_namespaces(7)](../man7/user%5Fnamespaces.7.html), **brctl**(8), [ip(8)](../man8/ip.8.html), [ip-address(8)](../man8/ip-address.8.html),
   [ip-link(8)](../man8/ip-link.8.html), [ip-netns(8)](../man8/ip-netns.8.html), [iptables(8)](../man8/iptables.8.html), [ovs-vsctl(8)](../man8/ovs-vsctl.8.html)

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Linux man-pages 6.10 2024-05-02 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)