1
2
3
4
5config PPP
6 tristate "PPP (point-to-point protocol) support"
7 select SLHC
8 ---help---
9 PPP (Point to Point Protocol) is a newer and better SLIP. It serves
10 the same purpose: sending Internet traffic over telephone (and other
11 serial) lines. Ask your access provider if they support it, because
12 otherwise you can't use it; most Internet access providers these
13 days support PPP rather than SLIP.
14
15 To use PPP, you need an additional program called pppd as described
16 in the PPP-HOWTO, available at
17 <http://www.tldp.org/docs.html
18 the version of pppd recommended in <file:Documentation/Changes>.
19 The PPP option enlarges your kernel by about 16 KB.
20
21 There are actually two versions of PPP: the traditional PPP for
22 asynchronous lines, such as regular analog phone lines, and
23 synchronous PPP which can be used over digital ISDN lines for
24 example. If you want to use PPP over phone lines or other
25 asynchronous serial lines, you need to say Y (or M) here and also to
26 the next option, "PPP support for async serial ports". For PPP over
27 synchronous lines, you should say Y (or M) here and to "Support
28 synchronous PPP", below.
29
30 If you said Y to "Version information on all symbols" above, then
31 you cannot compile the PPP driver into the kernel; you can then only
32 compile it as a module. To compile this driver as a module, choose M
33 here. The module will be called ppp_generic.
34
35if PPP
36
37config PPP_BSDCOMP
38 tristate "PPP BSD-Compress compression"
39 depends on PPP
40 ---help---
41 Support for the BSD-Compress compression method for PPP, which uses
42 the LZW compression method to compress each PPP packet before it is
43 sent over the wire. The machine at the other end of the PPP link
44 (usually your ISP) has to support the BSD-Compress compression
45 method as well for this to be useful. Even if they don't support it,
46 it is safe to say Y here.
47
48 The PPP Deflate compression method ("PPP Deflate compression",
49 above) is preferable to BSD-Compress, because it compresses better
50 and is patent-free.
51
52 Note that the BSD compression code will always be compiled as a
53 module; it is called bsd_comp and will show up in the directory
54 modules once you have said "make modules". If unsure, say N.
55
56config PPP_DEFLATE
57 tristate "PPP Deflate compression"
58 depends on PPP
59 select ZLIB_INFLATE
60 select ZLIB_DEFLATE
61 ---help---
62 Support for the Deflate compression method for PPP, which uses the
63 Deflate algorithm (the same algorithm that gzip uses) to compress
64 each PPP packet before it is sent over the wire. The machine at the
65 other end of the PPP link (usually your ISP) has to support the
66 Deflate compression method as well for this to be useful. Even if
67 they don't support it, it is safe to say Y here.
68
69 To compile this driver as a module, choose M here.
70
71config PPP_FILTER
72 bool "PPP filtering"
73 depends on PPP
74 ---help---
75 Say Y here if you want to be able to filter the packets passing over
76 PPP interfaces. This allows you to control which packets count as
77 activity (i.e. which packets will reset the idle timer or bring up
78 a demand-dialed link) and which packets are to be dropped entirely.
79 You need to say Y here if you wish to use the pass-filter and
80 active-filter options to pppd.
81
82 If unsure, say N.
83
84config PPP_MPPE
85 tristate "PPP MPPE compression (encryption)"
86 depends on PPP
87 select CRYPTO
88 select CRYPTO_SHA1
89 select CRYPTO_ARC4
90 select CRYPTO_ECB
91 ---help---
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
98config PPP_MULTILINK
99 bool "PPP multilink support"
100 depends on PPP
101 ---help---
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
111config PPPOATM
112 tristate "PPP over ATM"
113 depends on ATM && PPP
114 ---help---
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
120config PPPOE
121 tristate "PPP over Ethernet"
122 depends on PPP
123 ---help---
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
132config PPTP
133 tristate "PPP over IPv4 (PPTP)"
134 depends on PPP && NET_IPGRE_DEMUX
135 ---help---
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
143config PPPOL2TP
144 tristate "PPP over L2TP"
145 depends on L2TP && PPP
146 ---help---
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.
150if TTY
151
152config PPP_ASYNC
153 tristate "PPP support for async serial ports"
154 depends on PPP
155 select CRC_CCITT
156 ---help---
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
166config PPP_SYNC_TTY
167 tristate "PPP support for sync tty ports"
168 depends on PPP
169 ---help---
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
176endif
177
178endif
179
