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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"
7 ---help---
8 Unless you really know what you are doing, you should say Y here.
9 The reason is that some programs need kernel networking support even
10 when running on a stand-alone machine that isn't connected to any
Sam Ravnborgd5950b42005-07-11 21:03:49 -070011 other computer.
12
13 If you are upgrading from an older kernel, you
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 should consider updating your networking tools too because changes
15 in the kernel and the tools often go hand in hand. The tools are
16 contained in the package net-tools, the location and version number
17 of which are given in <file:Documentation/Changes>.
18
19 For a general introduction to Linux networking, it is highly
20 recommended to read the NET-HOWTO, available from
21 <http://www.tldp.org/docs.html#howto>.
22
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070023if NET
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025menu "Networking options"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Eric W. Biederman9dd776b2007-09-26 22:04:26 -070027config NET_NS
28 bool "Network namespace support"
29 default n
Eric W. Biederman38918452008-10-27 17:51:47 -070030 depends on EXPERIMENTAL && NAMESPACES
Eric W. Biederman9dd776b2007-09-26 22:04:26 -070031 help
32 Allow user space to create what appear to be multiple instances
33 of the network stack.
34
Stephen Hemmingerd3147742008-11-19 21:32:24 -080035config COMPAT_NET_DEV_OPS
36 def_bool y
37
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070038source "net/packet/Kconfig"
39source "net/unix/Kconfig"
40source "net/xfrm/Kconfig"
Martin Schwidefsky2356f4c2007-02-08 13:37:42 -080041source "net/iucv/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
43config INET
44 bool "TCP/IP networking"
45 ---help---
46 These are the protocols used on the Internet and on most local
47 Ethernets. It is highly recommended to say Y here (this will enlarge
YOSHIFUJI Hideakicf80efc2008-02-12 17:35:16 +090048 your kernel by about 400 KB), since some programs (e.g. the X window
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 system) use TCP/IP even if your machine is not connected to any
50 other computer. You will get the so-called loopback device which
51 allows you to ping yourself (great fun, that!).
52
53 For an excellent introduction to Linux networking, please read the
54 Linux Networking HOWTO, available from
55 <http://www.tldp.org/docs.html#howto>.
56
57 If you say Y here and also to "/proc file system support" and
58 "Sysctl support" below, you can change various aspects of the
59 behavior of the TCP/IP code by writing to the (virtual) files in
60 /proc/sys/net/ipv4/*; the options are explained in the file
61 <file:Documentation/networking/ip-sysctl.txt>.
62
63 Short answer: say Y.
64
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070065if INET
Linus Torvalds1da177e2005-04-16 15:20:36 -070066source "net/ipv4/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070067source "net/ipv6/Kconfig"
Paul Moore38c94372006-11-05 16:44:06 -080068source "net/netlabel/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070070endif # if INET
71
James Morris984bc162006-06-09 00:29:17 -070072config NETWORK_SECMARK
73 bool "Security Marking"
74 help
75 This enables security marking of network packets, similar
76 to nfmark, but designated for security purposes.
77 If you are unsure how to answer this question, answer N.
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +010080 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 ---help---
82 Netfilter is a framework for filtering and mangling network packets
83 that pass through your Linux box.
84
85 The most common use of packet filtering is to run your Linux box as
86 a firewall protecting a local network from the Internet. The type of
87 firewall provided by this kernel support is called a "packet
88 filter", which means that it can reject individual network packets
89 based on type, source, destination etc. The other kind of firewall,
90 a "proxy-based" one, is more secure but more intrusive and more
91 bothersome to set up; it inspects the network traffic much more
92 closely, modifies it and has knowledge about the higher level
93 protocols, which a packet filter lacks. Moreover, proxy-based
94 firewalls often require changes to the programs running on the local
95 clients. Proxy-based firewalls don't need support by the kernel, but
96 they are often combined with a packet filter, which only works if
97 you say Y here.
98
99 You should also say Y here if you intend to use your Linux box as
100 the gateway to the Internet for a local network of machines without
101 globally valid IP addresses. This is called "masquerading": if one
102 of the computers on your local network wants to send something to
103 the outside, your box can "masquerade" as that computer, i.e. it
104 forwards the traffic to the intended outside destination, but
105 modifies the packets to make it look like they came from the
106 firewall box itself. It works both ways: if the outside host
107 replies, the Linux box will silently forward the traffic to the
108 correct local computer. This way, the computers on your local net
109 are completely invisible to the outside world, even though they can
110 reach the outside and can receive replies. It is even possible to
111 run globally visible servers from within a masqueraded local network
112 using a mechanism called portforwarding. Masquerading is also often
113 called NAT (Network Address Translation).
114
115 Another use of Netfilter is in transparent proxying: if a machine on
116 the local network tries to connect to an outside host, your Linux
117 box can transparently forward the traffic to a local server,
118 typically a caching proxy server.
119
120 Yet another use of Netfilter is building a bridging firewall. Using
121 a bridge with Network packet filtering enabled makes iptables "see"
122 the bridged traffic. For filtering on the lower network and Ethernet
123 protocols over the bridge, use ebtables (under bridge netfilter
124 configuration).
125
126 Various modules exist for netfilter which replace the previous
127 masquerading (ipmasqadm), packet filtering (ipchains), transparent
128 proxying, and portforwarding mechanisms. Please see
129 <file:Documentation/Changes> under "iptables" for the location of
130 these packages.
131
132 Make sure to say N to "Fast switching" below if you intend to say Y
133 here, as Fast switching currently bypasses netfilter.
134
135 Chances are that you should say Y here if you compile a kernel which
136 will run as a router and N for regular hosts. If unsure, say N.
137
138if NETFILTER
139
140config NETFILTER_DEBUG
141 bool "Network packet filtering debugging"
142 depends on NETFILTER
143 help
144 You can say Y here if you want to get additional messages useful in
145 debugging the netfilter code.
146
Patrick McHardy33b8e772007-12-17 22:47:05 -0800147config NETFILTER_ADVANCED
148 bool "Advanced netfilter configuration"
149 depends on NETFILTER
150 default y
151 help
152 If you say Y here you can select between all the netfilter modules.
153 If you say N the more ununsual ones will not be shown and the
154 basic ones needed by most people will default to 'M'.
155
156 If unsure, say Y.
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158config BRIDGE_NETFILTER
159 bool "Bridged IP/ARP packets filtering"
160 depends on BRIDGE && NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800161 depends on NETFILTER_ADVANCED
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 default y
163 ---help---
164 Enabling this option will let arptables resp. iptables see bridged
165 ARP resp. IP traffic. If you want a bridging firewall, you probably
166 want this option enabled.
167 Enabling or disabling this option doesn't enable or disable
168 ebtables.
169
170 If unsure, say N.
171
Harald Welte9eb0eec2005-09-17 00:41:21 -0700172source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173source "net/ipv4/netfilter/Kconfig"
174source "net/ipv6/netfilter/Kconfig"
175source "net/decnet/netfilter/Kconfig"
176source "net/bridge/netfilter/Kconfig"
177
178endif
179
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700180source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181source "net/sctp/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100182source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700183source "net/atm/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700184source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700185source "net/bridge/Kconfig"
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000186source "net/dsa/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700187source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700192source "net/x25/Kconfig"
193source "net/lapb/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700194source "net/econet/Kconfig"
195source "net/wanrouter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196source "net/sched/Kconfig"
197
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198menu "Network testing"
199
200config NET_PKTGEN
201 tristate "Packet Generator (USE WITH CAUTION)"
202 depends on PROC_FS
203 ---help---
204 This module will inject preconfigured packets, at a configurable
205 rate, out of a given interface. It is used for network interface
206 stress testing and performance analysis. If you don't understand
207 what was just said, you don't need it: say N.
208
209 Documentation on how to use the packet generator can be found
210 at <file:Documentation/networking/pktgen.txt>.
211
212 To compile this code as a module, choose M here: the
213 module will be called pktgen.
214
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700215config NET_TCPPROBE
216 tristate "TCP connection probing"
217 depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
218 ---help---
219 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700220 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700221 TCP congestion avoidance modules. If you don't understand
222 what was just said, you don't need it: say N.
223
Grant Grundler82fe7c92006-09-25 23:47:14 -0700224 Documentation on how to use TCP connection probing can be found
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700225 at http://linux-net.osdl.org/index.php/TcpProbe
226
227 To compile this code as a module, choose M here: the
228 module will be called tcp_probe.
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230endmenu
231
232endmenu
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800235source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700238source "net/rxrpc/Kconfig"
Remi Denis-Courmont8ead5362008-09-22 20:03:00 -0700239source "net/phonet/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100240
Thomas Graf14c0b972006-08-04 03:38:38 -0700241config FIB_RULES
242 bool
243
Robert P. J. Day54420602008-07-24 12:20:09 -0400244menuconfig WIRELESS
245 bool "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200246 depends on !S390
Robert P. J. Day54420602008-07-24 12:20:09 -0400247 default y
248
249if WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700250
251source "net/wireless/Kconfig"
Jiri Bencf0706e82007-05-05 11:45:53 -0700252source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700253source "net/ieee80211/Kconfig"
254
Robert P. J. Day54420602008-07-24 12:20:09 -0400255endif # WIRELESS
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700256
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700257source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500258source "net/9p/Kconfig"
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700259
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700260endif # if NET