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NAME | DESCRIPTION | SEE ALSO | COLOPHON |
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NETWORK_NAMESPACES(7) Linux Programmer's Manual NETWORK_NAMESPACES(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 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 release 5.13 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)
Pages that refer to this page: nsenter(1), unshare(1), clone(2), veth(4), proc(5), systemd.socket(5), namespaces(7), rdma-system(8)
Copyright and license for this manual page
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