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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# Network configuration
3#
4
Robert P. J. Day031cf192008-07-30 03:14:01 -07005menuconfig NET
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 bool "Networking support"
Geert Uytterhoevene9cc8bd2009-03-04 14:53:30 +08007 select NLATTR
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 ---help---
9 Unless you really know what you are doing, you should say Y here.
10 The reason is that some programs need kernel networking support even
11 when running on a stand-alone machine that isn't connected to any
Sam Ravnborgd5950b42005-07-11 21:03:49 -070012 other computer.
13
14 If you are upgrading from an older kernel, you
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 should consider updating your networking tools too because changes
16 in the kernel and the tools often go hand in hand. The tools are
17 contained in the package net-tools, the location and version number
18 of which are given in <file:Documentation/Changes>.
19
20 For a general introduction to Linux networking, it is highly
21 recommended to read the NET-HOWTO, available from
22 <http://www.tldp.org/docs.html#howto>.
23
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070024if NET
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026menu "Networking options"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070028source "net/packet/Kconfig"
29source "net/unix/Kconfig"
30source "net/xfrm/Kconfig"
Martin Schwidefsky2356f4c2007-02-08 13:37:42 -080031source "net/iucv/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33config INET
34 bool "TCP/IP networking"
35 ---help---
36 These are the protocols used on the Internet and on most local
37 Ethernets. It is highly recommended to say Y here (this will enlarge
YOSHIFUJI Hideakicf80efc2008-02-12 17:35:16 +090038 your kernel by about 400 KB), since some programs (e.g. the X window
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 system) use TCP/IP even if your machine is not connected to any
40 other computer. You will get the so-called loopback device which
41 allows you to ping yourself (great fun, that!).
42
43 For an excellent introduction to Linux networking, please read the
44 Linux Networking HOWTO, available from
45 <http://www.tldp.org/docs.html#howto>.
46
47 If you say Y here and also to "/proc file system support" and
48 "Sysctl support" below, you can change various aspects of the
49 behavior of the TCP/IP code by writing to the (virtual) files in
50 /proc/sys/net/ipv4/*; the options are explained in the file
51 <file:Documentation/networking/ip-sysctl.txt>.
52
53 Short answer: say Y.
54
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070055if INET
Linus Torvalds1da177e2005-04-16 15:20:36 -070056source "net/ipv4/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070057source "net/ipv6/Kconfig"
Paul Moore38c94372006-11-05 16:44:06 -080058source "net/netlabel/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070060endif # if INET
61
James Morris984bc162006-06-09 00:29:17 -070062config NETWORK_SECMARK
63 bool "Security Marking"
64 help
65 This enables security marking of network packets, similar
66 to nfmark, but designated for security purposes.
67 If you are unsure how to answer this question, answer N.
68
Linus Torvalds1da177e2005-04-16 15:20:36 -070069menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +010070 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 ---help---
72 Netfilter is a framework for filtering and mangling network packets
73 that pass through your Linux box.
74
75 The most common use of packet filtering is to run your Linux box as
76 a firewall protecting a local network from the Internet. The type of
77 firewall provided by this kernel support is called a "packet
78 filter", which means that it can reject individual network packets
79 based on type, source, destination etc. The other kind of firewall,
80 a "proxy-based" one, is more secure but more intrusive and more
81 bothersome to set up; it inspects the network traffic much more
82 closely, modifies it and has knowledge about the higher level
83 protocols, which a packet filter lacks. Moreover, proxy-based
84 firewalls often require changes to the programs running on the local
85 clients. Proxy-based firewalls don't need support by the kernel, but
86 they are often combined with a packet filter, which only works if
87 you say Y here.
88
89 You should also say Y here if you intend to use your Linux box as
90 the gateway to the Internet for a local network of machines without
91 globally valid IP addresses. This is called "masquerading": if one
92 of the computers on your local network wants to send something to
93 the outside, your box can "masquerade" as that computer, i.e. it
94 forwards the traffic to the intended outside destination, but
95 modifies the packets to make it look like they came from the
96 firewall box itself. It works both ways: if the outside host
97 replies, the Linux box will silently forward the traffic to the
98 correct local computer. This way, the computers on your local net
99 are completely invisible to the outside world, even though they can
100 reach the outside and can receive replies. It is even possible to
101 run globally visible servers from within a masqueraded local network
102 using a mechanism called portforwarding. Masquerading is also often
103 called NAT (Network Address Translation).
104
105 Another use of Netfilter is in transparent proxying: if a machine on
106 the local network tries to connect to an outside host, your Linux
107 box can transparently forward the traffic to a local server,
108 typically a caching proxy server.
109
110 Yet another use of Netfilter is building a bridging firewall. Using
111 a bridge with Network packet filtering enabled makes iptables "see"
112 the bridged traffic. For filtering on the lower network and Ethernet
113 protocols over the bridge, use ebtables (under bridge netfilter
114 configuration).
115
116 Various modules exist for netfilter which replace the previous
117 masquerading (ipmasqadm), packet filtering (ipchains), transparent
118 proxying, and portforwarding mechanisms. Please see
119 <file:Documentation/Changes> under "iptables" for the location of
120 these packages.
121
122 Make sure to say N to "Fast switching" below if you intend to say Y
123 here, as Fast switching currently bypasses netfilter.
124
125 Chances are that you should say Y here if you compile a kernel which
126 will run as a router and N for regular hosts. If unsure, say N.
127
128if NETFILTER
129
130config NETFILTER_DEBUG
131 bool "Network packet filtering debugging"
132 depends on NETFILTER
133 help
134 You can say Y here if you want to get additional messages useful in
135 debugging the netfilter code.
136
Patrick McHardy33b8e772007-12-17 22:47:05 -0800137config NETFILTER_ADVANCED
138 bool "Advanced netfilter configuration"
139 depends on NETFILTER
140 default y
141 help
142 If you say Y here you can select between all the netfilter modules.
143 If you say N the more ununsual ones will not be shown and the
144 basic ones needed by most people will default to 'M'.
145
146 If unsure, say Y.
147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148config BRIDGE_NETFILTER
149 bool "Bridged IP/ARP packets filtering"
150 depends on BRIDGE && NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800151 depends on NETFILTER_ADVANCED
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 default y
153 ---help---
154 Enabling this option will let arptables resp. iptables see bridged
155 ARP resp. IP traffic. If you want a bridging firewall, you probably
156 want this option enabled.
157 Enabling or disabling this option doesn't enable or disable
158 ebtables.
159
160 If unsure, say N.
161
Harald Welte9eb0eec2005-09-17 00:41:21 -0700162source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163source "net/ipv4/netfilter/Kconfig"
164source "net/ipv6/netfilter/Kconfig"
165source "net/decnet/netfilter/Kconfig"
166source "net/bridge/netfilter/Kconfig"
167
168endif
169
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700170source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171source "net/sctp/Kconfig"
Andy Groverfe17f842009-02-24 15:30:39 +0000172source "net/rds/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100173source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700174source "net/atm/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700175source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700176source "net/bridge/Kconfig"
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000177source "net/dsa/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700178source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700183source "net/x25/Kconfig"
184source "net/lapb/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700185source "net/econet/Kconfig"
186source "net/wanrouter/Kconfig"
remi.denis-courmont@nokia50751382009-01-23 03:00:25 +0000187source "net/phonet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188source "net/sched/Kconfig"
Alexander Duyck2f90b862008-11-20 20:52:10 -0800189source "net/dcb/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191menu "Network testing"
192
193config NET_PKTGEN
194 tristate "Packet Generator (USE WITH CAUTION)"
195 depends on PROC_FS
196 ---help---
197 This module will inject preconfigured packets, at a configurable
198 rate, out of a given interface. It is used for network interface
199 stress testing and performance analysis. If you don't understand
200 what was just said, you don't need it: say N.
201
202 Documentation on how to use the packet generator can be found
203 at <file:Documentation/networking/pktgen.txt>.
204
205 To compile this code as a module, choose M here: the
206 module will be called pktgen.
207
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700208config NET_TCPPROBE
209 tristate "TCP connection probing"
210 depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
211 ---help---
212 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700213 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700214 TCP congestion avoidance modules. If you don't understand
215 what was just said, you don't need it: say N.
216
Grant Grundler82fe7c92006-09-25 23:47:14 -0700217 Documentation on how to use TCP connection probing can be found
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700218 at http://linux-net.osdl.org/index.php/TcpProbe
219
220 To compile this code as a module, choose M here: the
221 module will be called tcp_probe.
222
Neil Horman273ae442009-03-11 09:53:16 +0000223config NET_DROP_MONITOR
224 boolean "Network packet drop alerting service"
225 depends on INET && EXPERIMENTAL && TRACEPOINTS
226 ---help---
227 This feature provides an alerting service to userspace in the
228 event that packets are discarded in the network stack. Alerts
229 are broadcast via netlink socket to any listening user space
230 process. If you don't need network drop alerts, or if you are ok
231 just checking the various proc files and other utilities for
232 drop statistics, say N here.
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234endmenu
235
236endmenu
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800239source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700242source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100243
Thomas Graf14c0b972006-08-04 03:38:38 -0700244config FIB_RULES
245 bool
246
Robert P. J. Day54420602008-07-24 12:20:09 -0400247menuconfig WIRELESS
248 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200249 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400250 default y
251
252if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700253
254source "net/wireless/Kconfig"
Jiri Bencf0706e822007-05-05 11:45:53 -0700255source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700256
Robert P. J. Day54420602008-07-24 12:20:09 -0400257endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700258
Inaky Perez-Gonzalezb0c83ae2008-12-23 16:18:24 -0800259source "net/wimax/Kconfig"
260
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700261source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500262source "net/9p/Kconfig"
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700263
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700264endif # if NET