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1 | # |
2 | # Layer Two Tunneling Protocol (L2TP) |
3 | # |
4 | |
5 | menuconfig L2TP |
6 | tristate "Layer Two Tunneling Protocol (L2TP)" |
7 | depends on (IPV6 || IPV6=n) |
8 | depends on INET |
9 | ---help--- |
10 | Layer Two Tunneling Protocol |
11 | |
12 | From RFC 2661 <http://www.ietf.org/rfc/rfc2661.txt>. |
13 | |
14 | L2TP facilitates the tunneling of packets across an |
15 | intervening network in a way that is as transparent as |
16 | possible to both end-users and applications. |
17 | |
18 | L2TP is often used to tunnel PPP traffic over IP |
19 | tunnels. One IP tunnel may carry thousands of individual PPP |
20 | connections. L2TP is also used as a VPN protocol, popular |
21 | with home workers to connect to their offices. |
22 | |
23 | L2TPv3 allows other protocols as well as PPP to be carried |
24 | over L2TP tunnels. L2TPv3 is defined in RFC 3931 |
25 | <http://www.ietf.org/rfc/rfc3931.txt>. |
26 | |
27 | The kernel component handles only L2TP data packets: a |
28 | userland daemon handles L2TP the control protocol (tunnel |
29 | and session setup). One such daemon is OpenL2TP |
30 | (http://openl2tp.org/). |
31 | |
32 | If you don't need L2TP, say N. To compile all L2TP code as |
33 | modules, choose M here. |
34 | |
35 | config L2TP_DEBUGFS |
36 | tristate "L2TP debugfs support" |
37 | depends on L2TP && DEBUG_FS |
38 | help |
39 | Support for l2tp directory in debugfs filesystem. This may be |
40 | used to dump internal state of the l2tp drivers for problem |
41 | analysis. |
42 | |
43 | If unsure, say 'Y'. |
44 | |
45 | To compile this driver as a module, choose M here. The module |
46 | will be called l2tp_debugfs. |
47 | |
48 | config L2TP_V3 |
49 | bool "L2TPv3 support" |
50 | depends on L2TP |
51 | help |
52 | Layer Two Tunneling Protocol Version 3 |
53 | |
54 | From RFC 3931 <http://www.ietf.org/rfc/rfc3931.txt>. |
55 | |
56 | The Layer Two Tunneling Protocol (L2TP) provides a dynamic |
57 | mechanism for tunneling Layer 2 (L2) "circuits" across a |
58 | packet-oriented data network (e.g., over IP). L2TP, as |
59 | originally defined in RFC 2661, is a standard method for |
60 | tunneling Point-to-Point Protocol (PPP) [RFC1661] sessions. |
61 | L2TP has since been adopted for tunneling a number of other |
62 | L2 protocols, including ATM, Frame Relay, HDLC and even raw |
63 | ethernet frames. |
64 | |
65 | If you are connecting to L2TPv3 equipment, or you want to |
66 | tunnel raw ethernet frames using L2TP, say Y here. If |
67 | unsure, say N. |
68 | |
69 | config L2TP_IP |
70 | tristate "L2TP IP encapsulation for L2TPv3" |
71 | depends on L2TP_V3 |
72 | help |
73 | Support for L2TP-over-IP socket family. |
74 | |
75 | The L2TPv3 protocol defines two possible encapsulations for |
76 | L2TP frames, namely UDP and plain IP (without UDP). This |
77 | driver provides a new L2TPIP socket family with which |
78 | userspace L2TPv3 daemons may create L2TP/IP tunnel sockets |
79 | when UDP encapsulation is not required. When L2TP is carried |
80 | in IP packets, it used IP protocol number 115, so this port |
81 | must be enabled in firewalls. |
82 | |
83 | To compile this driver as a module, choose M here. The module |
84 | will be called l2tp_ip. |
85 | |
86 | config L2TP_ETH |
87 | tristate "L2TP ethernet pseudowire support for L2TPv3" |
88 | depends on L2TP_V3 |
89 | help |
90 | Support for carrying raw ethernet frames over L2TPv3. |
91 | |
92 | From RFC 4719 <http://www.ietf.org/rfc/rfc4719.txt>. |
93 | |
94 | The Layer 2 Tunneling Protocol, Version 3 (L2TPv3) can be |
95 | used as a control protocol and for data encapsulation to set |
96 | up Pseudowires for transporting layer 2 Packet Data Units |
97 | across an IP network [RFC3931]. |
98 | |
99 | This driver provides an ethernet virtual interface for each |
100 | L2TP ethernet pseudowire instance. Standard Linux tools may |
101 | be used to assign an IP address to the local virtual |
102 | interface, or add the interface to a bridge. |
103 | |
104 | If you are using L2TPv3, you will almost certainly want to |
105 | enable this option. |
106 | |
107 | To compile this driver as a module, choose M here. The module |
108 | will be called l2tp_eth. |
109 |
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