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178 lines
6.2 KiB
178 lines
6.2 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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# |
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# PPP network device configuration |
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# |
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config PPP |
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tristate "PPP (point-to-point protocol) support" |
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select SLHC |
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help |
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PPP (Point to Point Protocol) is a newer and better SLIP. It serves |
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the same purpose: sending Internet traffic over telephone (and other |
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serial) lines. Ask your access provider if they support it, because |
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otherwise you can't use it; most Internet access providers these |
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days support PPP rather than SLIP. |
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To use PPP, you need an additional program called pppd as described |
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in the PPP-HOWTO, available at |
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<http://www.tldp.org/docs.html#howto>. Make sure that you have |
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the version of pppd recommended in <file:Documentation/Changes>. |
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The PPP option enlarges your kernel by about 16 KB. |
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There are actually two versions of PPP: the traditional PPP for |
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asynchronous lines, such as regular analog phone lines, and |
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synchronous PPP which can be used over digital ISDN lines for |
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example. If you want to use PPP over phone lines or other |
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asynchronous serial lines, you need to say Y (or M) here and also to |
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the next option, "PPP support for async serial ports". For PPP over |
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synchronous lines, you should say Y (or M) here and to "Support |
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synchronous PPP", below. |
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If you said Y to "Version information on all symbols" above, then |
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you cannot compile the PPP driver into the kernel; you can then only |
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compile it as a module. To compile this driver as a module, choose M |
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here. The module will be called ppp_generic. |
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if PPP |
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config PPP_BSDCOMP |
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tristate "PPP BSD-Compress compression" |
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depends on PPP |
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help |
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Support for the BSD-Compress compression method for PPP, which uses |
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the LZW compression method to compress each PPP packet before it is |
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sent over the wire. The machine at the other end of the PPP link |
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(usually your ISP) has to support the BSD-Compress compression |
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method as well for this to be useful. Even if they don't support it, |
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it is safe to say Y here. |
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The PPP Deflate compression method ("PPP Deflate compression", |
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above) is preferable to BSD-Compress, because it compresses better |
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and is patent-free. |
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Note that the BSD compression code will always be compiled as a |
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module; it is called bsd_comp and will show up in the directory |
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modules once you have said "make modules". If unsure, say N. |
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config PPP_DEFLATE |
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tristate "PPP Deflate compression" |
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depends on PPP |
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select ZLIB_INFLATE |
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select ZLIB_DEFLATE |
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help |
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Support for the Deflate compression method for PPP, which uses the |
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Deflate algorithm (the same algorithm that gzip uses) to compress |
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each PPP packet before it is sent over the wire. The machine at the |
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other end of the PPP link (usually your ISP) has to support the |
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Deflate compression method as well for this to be useful. Even if |
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they don't support it, it is safe to say Y here. |
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To compile this driver as a module, choose M here. |
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config PPP_FILTER |
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bool "PPP filtering" |
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depends on PPP |
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help |
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Say Y here if you want to be able to filter the packets passing over |
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PPP interfaces. This allows you to control which packets count as |
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activity (i.e. which packets will reset the idle timer or bring up |
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a demand-dialed link) and which packets are to be dropped entirely. |
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You need to say Y here if you wish to use the pass-filter and |
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active-filter options to pppd. |
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If unsure, say N. |
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config PPP_MPPE |
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tristate "PPP MPPE compression (encryption)" |
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depends on PPP |
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select CRYPTO |
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select CRYPTO_SHA1 |
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select CRYPTO_LIB_ARC4 |
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help |
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Support for the MPPE Encryption protocol, as employed by the |
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Microsoft Point-to-Point Tunneling Protocol. |
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See http://pptpclient.sourceforge.net/ for information on |
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configuring PPTP clients and servers to utilize this method. |
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config PPP_MULTILINK |
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bool "PPP multilink support" |
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depends on PPP |
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help |
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PPP multilink is a protocol (defined in RFC 1990) which allows you |
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to combine several (logical or physical) lines into one logical PPP |
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connection, so that you can utilize your full bandwidth. |
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This has to be supported at the other end as well and you need a |
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version of the pppd daemon which understands the multilink protocol. |
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If unsure, say N. |
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config PPPOATM |
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tristate "PPP over ATM" |
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depends on ATM && PPP |
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help |
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Support PPP (Point to Point Protocol) encapsulated in ATM frames. |
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This implementation does not yet comply with section 8 of RFC2364, |
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which can lead to bad results if the ATM peer loses state and |
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changes its encapsulation unilaterally. |
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config PPPOE |
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tristate "PPP over Ethernet" |
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depends on PPP |
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help |
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Support for PPP over Ethernet. |
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This driver requires the latest version of pppd from the CVS |
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repository at cvs.samba.org. Alternatively, see the |
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RoaringPenguin package (<http://www.roaringpenguin.com/pppoe>) |
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which contains instruction on how to use this driver (under |
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the heading "Kernel mode PPPoE"). |
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config PPTP |
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tristate "PPP over IPv4 (PPTP)" |
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depends on PPP && NET_IPGRE_DEMUX |
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help |
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Support for PPP over IPv4.(Point-to-Point Tunneling Protocol) |
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This driver requires pppd plugin to work in client mode or |
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modified pptpd (poptop) to work in server mode. |
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See http://accel-pptp.sourceforge.net/ for information how to |
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utilize this module. |
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config PPPOL2TP |
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tristate "PPP over L2TP" |
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depends on L2TP && PPP |
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help |
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Support for PPP-over-L2TP socket family. L2TP is a protocol |
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used by ISPs and enterprises to tunnel PPP traffic over UDP |
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tunnels. L2TP is replacing PPTP for VPN uses. |
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if TTY |
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config PPP_ASYNC |
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tristate "PPP support for async serial ports" |
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depends on PPP |
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select CRC_CCITT |
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help |
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Say Y (or M) here if you want to be able to use PPP over standard |
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asynchronous serial ports, such as COM1 or COM2 on a PC. If you use |
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a modem (not a synchronous or ISDN modem) to contact your ISP, you |
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need this option. |
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To compile this driver as a module, choose M here. |
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If unsure, say Y. |
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config PPP_SYNC_TTY |
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tristate "PPP support for sync tty ports" |
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depends on PPP |
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help |
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Say Y (or M) here if you want to be able to use PPP over synchronous |
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(HDLC) tty devices, such as the SyncLink adapter. These devices |
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are often used for high-speed leased lines like T1/E1. |
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To compile this driver as a module, choose M here. |
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endif # TTY |
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endif # PPP
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