[mirror_ubuntu-zesty-kernel.git] / net / l2tp / Kconfig

#
# Layer Two Tunneling Protocol (L2TP)
#

menuconfig L2TP
	tristate "Layer Two Tunneling Protocol (L2TP)"
	depends on INET
	---help---
	  Layer Two Tunneling Protocol

	  From RFC 2661 <http://www.ietf.org/rfc/rfc2661.txt>.

	  L2TP facilitates the tunneling of packets across an
	  intervening network in a way that is as transparent as
	  possible to both end-users and applications.

	  L2TP is often used to tunnel PPP traffic over IP
	  tunnels. One IP tunnel may carry thousands of individual PPP
	  connections. L2TP is also used as a VPN protocol, popular
	  with home workers to connect to their offices.

	  L2TPv3 allows other protocols as well as PPP to be carried
	  over L2TP tunnels. L2TPv3 is defined in RFC 3931
	  <http://www.ietf.org/rfc/rfc3931.txt>.

	  The kernel component handles only L2TP data packets: a
	  userland daemon handles L2TP the control protocol (tunnel
	  and session setup). One such daemon is OpenL2TP
	  (http://openl2tp.org/).

	  If you don't need L2TP, say N. To compile all L2TP code as
	  modules, choose M here.

config L2TP_V3
	bool "L2TPv3 support (EXPERIMENTAL)"
	depends on EXPERIMENTAL && L2TP
	help
	  Layer Two Tunneling Protocol Version 3

	  From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>.

	  The Layer Two Tunneling Protocol (L2TP) provides a dynamic
	  mechanism for tunneling Layer 2 (L2) "circuits" across a
	  packet-oriented data network (e.g., over IP).  L2TP, as
	  originally defined in RFC 2661, is a standard method for
	  tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions.
	  L2TP has since been adopted for tunneling a number of other
	  L2 protocols, including ATM, Frame Relay, HDLC and even raw
	  ethernet frames.

	  If you are connecting to L2TPv3 equipment, or you want to
	  tunnel raw ethernet frames using L2TP, say Y here. If
	  unsure, say N.

config L2TP_IP
	tristate "L2TP IP encapsulation for L2TPv3"
	depends on L2TP_V3
	help
	  Support for L2TP-over-IP socket family.

	  The L2TPv3 protocol defines two possible encapsulations for
	  L2TP frames, namely UDP and plain IP (without UDP). This
	  driver provides a new L2TPIP socket family with which
	  userspace L2TPv3 daemons may create L2TP/IP tunnel sockets
	  when UDP encapsulation is not required. When L2TP is carried
	  in IP packets, it used IP protocol number 115, so this port
	  must be enabled in firewalls.

	  To compile this driver as a module, choose M here. The module
	  will be called l2tp_ip.
Commit	Line	Data
fd558d18 JC	1	#
	2	# Layer Two Tunneling Protocol (L2TP)
	3	#
	4
	5	menuconfig L2TP
	6	tristate "Layer Two Tunneling Protocol (L2TP)"
	7	depends on INET
	8	---help---
	9	Layer Two Tunneling Protocol
	10
	11	From RFC 2661 <http://www.ietf.org/rfc/rfc2661.txt>.
	12
	13	L2TP facilitates the tunneling of packets across an
	14	intervening network in a way that is as transparent as
	15	possible to both end-users and applications.
	16
	17	L2TP is often used to tunnel PPP traffic over IP
	18	tunnels. One IP tunnel may carry thousands of individual PPP
	19	connections. L2TP is also used as a VPN protocol, popular
	20	with home workers to connect to their offices.
	21
f7faffa3 JC	22	L2TPv3 allows other protocols as well as PPP to be carried
	23	over L2TP tunnels. L2TPv3 is defined in RFC 3931
	24	<http://www.ietf.org/rfc/rfc3931.txt>.
	25
fd558d18 JC	26	The kernel component handles only L2TP data packets: a
	27	userland daemon handles L2TP the control protocol (tunnel
	28	and session setup). One such daemon is OpenL2TP
	29	(http://openl2tp.org/).
	30
	31	If you don't need L2TP, say N. To compile all L2TP code as
	32	modules, choose M here.
f7faffa3 JC	33
	34	config L2TP_V3
	35	bool "L2TPv3 support (EXPERIMENTAL)"
	36	depends on EXPERIMENTAL && L2TP
	37	help
	38	Layer Two Tunneling Protocol Version 3
	39
	40	From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>.
	41
	42	The Layer Two Tunneling Protocol (L2TP) provides a dynamic
	43	mechanism for tunneling Layer 2 (L2) "circuits" across a
	44	packet-oriented data network (e.g., over IP). L2TP, as
	45	originally defined in RFC 2661, is a standard method for
	46	tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions.
	47	L2TP has since been adopted for tunneling a number of other
	48	L2 protocols, including ATM, Frame Relay, HDLC and even raw
	49	ethernet frames.
	50
	51	If you are connecting to L2TPv3 equipment, or you want to
	52	tunnel raw ethernet frames using L2TP, say Y here. If
	53	unsure, say N.
0d76751f JC	54
	55	config L2TP_IP
	56	tristate "L2TP IP encapsulation for L2TPv3"
	57	depends on L2TP_V3
	58	help
	59	Support for L2TP-over-IP socket family.
	60
	61	The L2TPv3 protocol defines two possible encapsulations for
	62	L2TP frames, namely UDP and plain IP (without UDP). This
	63	driver provides a new L2TPIP socket family with which
	64	userspace L2TPv3 daemons may create L2TP/IP tunnel sockets
	65	when UDP encapsulation is not required. When L2TP is carried
	66	in IP packets, it used IP protocol number 115, so this port
	67	must be enabled in firewalls.
	68
	69	To compile this driver as a module, choose M here. The module
	70	will be called l2tp_ip.