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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
224cf5ad JK |
2 | # |
3 | # PPP network device configuration | |
4 | # | |
5 | ||
6 | config PPP | |
7 | tristate "PPP (point-to-point protocol) support" | |
8 | select SLHC | |
a7f7f624 | 9 | help |
224cf5ad JK |
10 | PPP (Point to Point Protocol) is a newer and better SLIP. It serves |
11 | the same purpose: sending Internet traffic over telephone (and other | |
12 | serial) lines. Ask your access provider if they support it, because | |
13 | otherwise you can't use it; most Internet access providers these | |
14 | days support PPP rather than SLIP. | |
15 | ||
16 | To use PPP, you need an additional program called pppd as described | |
17 | in the PPP-HOWTO, available at | |
18 | <http://www.tldp.org/docs.html#howto>. Make sure that you have | |
19 | the version of pppd recommended in <file:Documentation/Changes>. | |
20 | The PPP option enlarges your kernel by about 16 KB. | |
21 | ||
22 | There are actually two versions of PPP: the traditional PPP for | |
23 | asynchronous lines, such as regular analog phone lines, and | |
24 | synchronous PPP which can be used over digital ISDN lines for | |
25 | example. If you want to use PPP over phone lines or other | |
26 | asynchronous serial lines, you need to say Y (or M) here and also to | |
27 | the next option, "PPP support for async serial ports". For PPP over | |
28 | synchronous lines, you should say Y (or M) here and to "Support | |
29 | synchronous PPP", below. | |
30 | ||
31 | If you said Y to "Version information on all symbols" above, then | |
32 | you cannot compile the PPP driver into the kernel; you can then only | |
33 | compile it as a module. To compile this driver as a module, choose M | |
34 | here. The module will be called ppp_generic. | |
35 | ||
36 | if PPP | |
37 | ||
38 | config PPP_BSDCOMP | |
39 | tristate "PPP BSD-Compress compression" | |
40 | depends on PPP | |
a7f7f624 | 41 | help |
224cf5ad JK |
42 | Support for the BSD-Compress compression method for PPP, which uses |
43 | the LZW compression method to compress each PPP packet before it is | |
44 | sent over the wire. The machine at the other end of the PPP link | |
45 | (usually your ISP) has to support the BSD-Compress compression | |
46 | method as well for this to be useful. Even if they don't support it, | |
47 | it is safe to say Y here. | |
48 | ||
49 | The PPP Deflate compression method ("PPP Deflate compression", | |
50 | above) is preferable to BSD-Compress, because it compresses better | |
51 | and is patent-free. | |
52 | ||
53 | Note that the BSD compression code will always be compiled as a | |
54 | module; it is called bsd_comp and will show up in the directory | |
55 | modules once you have said "make modules". If unsure, say N. | |
56 | ||
57 | config PPP_DEFLATE | |
58 | tristate "PPP Deflate compression" | |
59 | depends on PPP | |
60 | select ZLIB_INFLATE | |
61 | select ZLIB_DEFLATE | |
a7f7f624 | 62 | help |
224cf5ad JK |
63 | Support for the Deflate compression method for PPP, which uses the |
64 | Deflate algorithm (the same algorithm that gzip uses) to compress | |
65 | each PPP packet before it is sent over the wire. The machine at the | |
66 | other end of the PPP link (usually your ISP) has to support the | |
67 | Deflate compression method as well for this to be useful. Even if | |
68 | they don't support it, it is safe to say Y here. | |
69 | ||
70 | To compile this driver as a module, choose M here. | |
71 | ||
72 | config PPP_FILTER | |
73 | bool "PPP filtering" | |
74 | depends on PPP | |
a7f7f624 | 75 | help |
224cf5ad JK |
76 | Say Y here if you want to be able to filter the packets passing over |
77 | PPP interfaces. This allows you to control which packets count as | |
78 | activity (i.e. which packets will reset the idle timer or bring up | |
79 | a demand-dialed link) and which packets are to be dropped entirely. | |
80 | You need to say Y here if you wish to use the pass-filter and | |
81 | active-filter options to pppd. | |
82 | ||
83 | If unsure, say N. | |
84 | ||
85 | config PPP_MPPE | |
8aa53cb3 KC |
86 | tristate "PPP MPPE compression (encryption)" |
87 | depends on PPP | |
224cf5ad JK |
88 | select CRYPTO |
89 | select CRYPTO_SHA1 | |
0e5a610b | 90 | select CRYPTO_LIB_ARC4 |
a7f7f624 | 91 | help |
224cf5ad JK |
92 | Support for the MPPE Encryption protocol, as employed by the |
93 | Microsoft Point-to-Point Tunneling Protocol. | |
94 | ||
95 | See http://pptpclient.sourceforge.net/ for information on | |
96 | configuring PPTP clients and servers to utilize this method. | |
97 | ||
98 | config PPP_MULTILINK | |
8aa53cb3 KC |
99 | bool "PPP multilink support" |
100 | depends on PPP | |
a7f7f624 | 101 | help |
224cf5ad JK |
102 | PPP multilink is a protocol (defined in RFC 1990) which allows you |
103 | to combine several (logical or physical) lines into one logical PPP | |
104 | connection, so that you can utilize your full bandwidth. | |
105 | ||
106 | This has to be supported at the other end as well and you need a | |
107 | version of the pppd daemon which understands the multilink protocol. | |
108 | ||
109 | If unsure, say N. | |
110 | ||
111 | config PPPOATM | |
112 | tristate "PPP over ATM" | |
113 | depends on ATM && PPP | |
a7f7f624 | 114 | help |
224cf5ad JK |
115 | Support PPP (Point to Point Protocol) encapsulated in ATM frames. |
116 | This implementation does not yet comply with section 8 of RFC2364, | |
117 | which can lead to bad results if the ATM peer loses state and | |
118 | changes its encapsulation unilaterally. | |
119 | ||
120 | config PPPOE | |
8aa53cb3 KC |
121 | tristate "PPP over Ethernet" |
122 | depends on PPP | |
a7f7f624 | 123 | help |
224cf5ad JK |
124 | Support for PPP over Ethernet. |
125 | ||
126 | This driver requires the latest version of pppd from the CVS | |
127 | repository at cvs.samba.org. Alternatively, see the | |
128 | RoaringPenguin package (<http://www.roaringpenguin.com/pppoe>) | |
129 | which contains instruction on how to use this driver (under | |
130 | the heading "Kernel mode PPPoE"). | |
131 | ||
132 | config PPTP | |
8aa53cb3 KC |
133 | tristate "PPP over IPv4 (PPTP)" |
134 | depends on PPP && NET_IPGRE_DEMUX | |
a7f7f624 | 135 | help |
224cf5ad JK |
136 | Support for PPP over IPv4.(Point-to-Point Tunneling Protocol) |
137 | ||
138 | This driver requires pppd plugin to work in client mode or | |
139 | modified pptpd (poptop) to work in server mode. | |
140 | See http://accel-pptp.sourceforge.net/ for information how to | |
141 | utilize this module. | |
142 | ||
143 | config PPPOL2TP | |
8aa53cb3 KC |
144 | tristate "PPP over L2TP" |
145 | depends on L2TP && PPP | |
a7f7f624 | 146 | help |
224cf5ad JK |
147 | Support for PPP-over-L2TP socket family. L2TP is a protocol |
148 | used by ISPs and enterprises to tunnel PPP traffic over UDP | |
149 | tunnels. L2TP is replacing PPTP for VPN uses. | |
4f73bc4d | 150 | if TTY |
224cf5ad JK |
151 | |
152 | config PPP_ASYNC | |
153 | tristate "PPP support for async serial ports" | |
154 | depends on PPP | |
155 | select CRC_CCITT | |
a7f7f624 | 156 | help |
224cf5ad JK |
157 | Say Y (or M) here if you want to be able to use PPP over standard |
158 | asynchronous serial ports, such as COM1 or COM2 on a PC. If you use | |
159 | a modem (not a synchronous or ISDN modem) to contact your ISP, you | |
160 | need this option. | |
161 | ||
162 | To compile this driver as a module, choose M here. | |
163 | ||
164 | If unsure, say Y. | |
165 | ||
166 | config PPP_SYNC_TTY | |
167 | tristate "PPP support for sync tty ports" | |
168 | depends on PPP | |
a7f7f624 | 169 | help |
224cf5ad JK |
170 | Say Y (or M) here if you want to be able to use PPP over synchronous |
171 | (HDLC) tty devices, such as the SyncLink adapter. These devices | |
172 | are often used for high-speed leased lines like T1/E1. | |
173 | ||
174 | To compile this driver as a module, choose M here. | |
175 | ||
4f73bc4d JM |
176 | endif # TTY |
177 | ||
224cf5ad | 178 | endif # PPP |