1NETWORK_NAMESPACES(7)      Linux Programmer's Manual     NETWORK_NAMESPACES(7)
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NAME

6       network_namespaces - overview of Linux network namespaces
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DESCRIPTION

9       Network namespaces provide isolation of the system resources associated
10       with networking: network devices, IPv4 and  IPv6  protocol  stacks,  IP
11       routing  tables,  firewall  rules,  the /proc/net directory (which is a
12       symbolic link to /proc/PID/net), the /sys/class/net directory,  various
13       files under /proc/sys/net, port numbers (sockets), and so on.
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15       A  physical  network  device can live in exactly one network namespace.
16       When a network namespace is freed (i.e., when the last process  in  the
17       namespace  terminates),  its physical network devices are moved back to
18       the initial network namespace (not to the parent of the process).
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20       A virtual network (veth(4)) device pair provides a  pipe-like  abstrac‐
21       tion that can be used to create tunnels between network namespaces, and
22       can be used to create a bridge to a physical network device in  another
23       namespace.  When a namespace is freed, the veth(4) devices that it con‐
24       tains are destroyed.
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26       Use of network namespaces requires a kernel that is configured with the
27       CONFIG_NET_NS option.
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SEE ALSO

30       nsenter(1),  unshare(1),  clone(2),  veth(4), proc(5), sysfs(5), names‐
31       paces(7),  user_namespaces(7),  brctl(8),  ip(8),  ip-address(8),   ip-
32       link(8), ip-netns(8), iptables(8), ovs-vsctl(8)
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COLOPHON

35       This  page  is  part of release 4.15 of the Linux man-pages project.  A
36       description of the project, information about reporting bugs,  and  the
37       latest     version     of     this    page,    can    be    found    at
38       https://www.kernel.org/doc/man-pages/.
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42Linux                             2018-02-02             NETWORK_NAMESPACES(7)
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