NETWORK_NAMESPACES(7) - phpMan

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

NAME
       network_namespaces - overview of Linux network namespaces

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
       /proc/net directory (which is a symbolic link to /proc/PID/net), the /sys/class/net direc-
       tory, 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 name-
       space 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 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)  de-
       vices that it contains are destroyed.

       Use  of network namespaces requires a kernel that is configured with the CONFIG_NET_NS op-
       tion.

SEE ALSO
       nsenter(1), unshare(1), clone(2), veth(4), proc(5),  sysfs(5),  namespaces(7),  user_name-
       spaces(7),   brctl(8),   ip(8),   ip-address(8),   ip-link(8),  ip-netns(8),  iptables(8),
       ovs-vsctl(8)

COLOPHON
       This page is part of release 5.10 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at https://www.kernel.org/doc/man-pages/.

Linux                                       2020-06-09                      NETWORK_NAMESPACES(7)

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