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 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.

SEE ALSO

       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)

Linux man-pages 6.7                                2023-10-31                              network_namespaces(7)