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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
Pavel Emelyanovcbdc7382008-02-08 04:18:25 -080030 depends on EXPERIMENTAL && !SYSFS && 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
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070035source "net/packet/Kconfig"
36source "net/unix/Kconfig"
37source "net/xfrm/Kconfig"
Martin Schwidefsky2356f4c2007-02-08 13:37:42 -080038source "net/iucv/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40config INET
41 bool "TCP/IP networking"
42 ---help---
43 These are the protocols used on the Internet and on most local
44 Ethernets. It is highly recommended to say Y here (this will enlarge
YOSHIFUJI Hideakicf80efc2008-02-12 17:35:16 +090045 your kernel by about 400 KB), since some programs (e.g. the X window
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 system) use TCP/IP even if your machine is not connected to any
47 other computer. You will get the so-called loopback device which
48 allows you to ping yourself (great fun, that!).
49
50 For an excellent introduction to Linux networking, please read the
51 Linux Networking HOWTO, available from
52 <http://www.tldp.org/docs.html#howto>.
53
54 If you say Y here and also to "/proc file system support" and
55 "Sysctl support" below, you can change various aspects of the
56 behavior of the TCP/IP code by writing to the (virtual) files in
57 /proc/sys/net/ipv4/*; the options are explained in the file
58 <file:Documentation/networking/ip-sysctl.txt>.
59
60 Short answer: say Y.
61
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070062if INET
Linus Torvalds1da177e2005-04-16 15:20:36 -070063source "net/ipv4/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070064source "net/ipv6/Kconfig"
Paul Moore38c94372006-11-05 16:44:06 -080065source "net/netlabel/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -070067endif # if INET
68
James Morris984bc162006-06-09 00:29:17 -070069config NETWORK_SECMARK
70 bool "Security Marking"
71 help
72 This enables security marking of network packets, similar
73 to nfmark, but designated for security purposes.
74 If you are unsure how to answer this question, answer N.
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076menuconfig NETFILTER
Pablo Neira Ayusoef91fd52006-11-29 02:35:43 +010077 bool "Network packet filtering framework (Netfilter)"
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 ---help---
79 Netfilter is a framework for filtering and mangling network packets
80 that pass through your Linux box.
81
82 The most common use of packet filtering is to run your Linux box as
83 a firewall protecting a local network from the Internet. The type of
84 firewall provided by this kernel support is called a "packet
85 filter", which means that it can reject individual network packets
86 based on type, source, destination etc. The other kind of firewall,
87 a "proxy-based" one, is more secure but more intrusive and more
88 bothersome to set up; it inspects the network traffic much more
89 closely, modifies it and has knowledge about the higher level
90 protocols, which a packet filter lacks. Moreover, proxy-based
91 firewalls often require changes to the programs running on the local
92 clients. Proxy-based firewalls don't need support by the kernel, but
93 they are often combined with a packet filter, which only works if
94 you say Y here.
95
96 You should also say Y here if you intend to use your Linux box as
97 the gateway to the Internet for a local network of machines without
98 globally valid IP addresses. This is called "masquerading": if one
99 of the computers on your local network wants to send something to
100 the outside, your box can "masquerade" as that computer, i.e. it
101 forwards the traffic to the intended outside destination, but
102 modifies the packets to make it look like they came from the
103 firewall box itself. It works both ways: if the outside host
104 replies, the Linux box will silently forward the traffic to the
105 correct local computer. This way, the computers on your local net
106 are completely invisible to the outside world, even though they can
107 reach the outside and can receive replies. It is even possible to
108 run globally visible servers from within a masqueraded local network
109 using a mechanism called portforwarding. Masquerading is also often
110 called NAT (Network Address Translation).
111
112 Another use of Netfilter is in transparent proxying: if a machine on
113 the local network tries to connect to an outside host, your Linux
114 box can transparently forward the traffic to a local server,
115 typically a caching proxy server.
116
117 Yet another use of Netfilter is building a bridging firewall. Using
118 a bridge with Network packet filtering enabled makes iptables "see"
119 the bridged traffic. For filtering on the lower network and Ethernet
120 protocols over the bridge, use ebtables (under bridge netfilter
121 configuration).
122
123 Various modules exist for netfilter which replace the previous
124 masquerading (ipmasqadm), packet filtering (ipchains), transparent
125 proxying, and portforwarding mechanisms. Please see
126 <file:Documentation/Changes> under "iptables" for the location of
127 these packages.
128
129 Make sure to say N to "Fast switching" below if you intend to say Y
130 here, as Fast switching currently bypasses netfilter.
131
132 Chances are that you should say Y here if you compile a kernel which
133 will run as a router and N for regular hosts. If unsure, say N.
134
135if NETFILTER
136
137config NETFILTER_DEBUG
138 bool "Network packet filtering debugging"
139 depends on NETFILTER
140 help
141 You can say Y here if you want to get additional messages useful in
142 debugging the netfilter code.
143
Patrick McHardy33b8e772007-12-17 22:47:05 -0800144config NETFILTER_ADVANCED
145 bool "Advanced netfilter configuration"
146 depends on NETFILTER
147 default y
148 help
149 If you say Y here you can select between all the netfilter modules.
150 If you say N the more ununsual ones will not be shown and the
151 basic ones needed by most people will default to 'M'.
152
153 If unsure, say Y.
154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155config BRIDGE_NETFILTER
156 bool "Bridged IP/ARP packets filtering"
157 depends on BRIDGE && NETFILTER && INET
Patrick McHardy33b8e772007-12-17 22:47:05 -0800158 depends on NETFILTER_ADVANCED
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 default y
160 ---help---
161 Enabling this option will let arptables resp. iptables see bridged
162 ARP resp. IP traffic. If you want a bridging firewall, you probably
163 want this option enabled.
164 Enabling or disabling this option doesn't enable or disable
165 ebtables.
166
167 If unsure, say N.
168
Harald Welte9eb0eec2005-09-17 00:41:21 -0700169source "net/netfilter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170source "net/ipv4/netfilter/Kconfig"
171source "net/ipv6/netfilter/Kconfig"
172source "net/decnet/netfilter/Kconfig"
173source "net/bridge/netfilter/Kconfig"
174
175endif
176
Arnaldo Carvalho de Melo7c657872005-08-09 20:14:34 -0700177source "net/dccp/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178source "net/sctp/Kconfig"
Per Liden1e63e682006-01-16 16:39:13 +0100179source "net/tipc/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700180source "net/atm/Kconfig"
Patrick McHardya19800d2008-07-05 21:25:39 -0700181source "net/802/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700182source "net/bridge/Kconfig"
183source "net/8021q/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184source "net/decnet/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185source "net/llc/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186source "net/ipx/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187source "drivers/net/appletalk/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700188source "net/x25/Kconfig"
189source "net/lapb/Kconfig"
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700190source "net/econet/Kconfig"
191source "net/wanrouter/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192source "net/sched/Kconfig"
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194menu "Network testing"
195
196config NET_PKTGEN
197 tristate "Packet Generator (USE WITH CAUTION)"
198 depends on PROC_FS
199 ---help---
200 This module will inject preconfigured packets, at a configurable
201 rate, out of a given interface. It is used for network interface
202 stress testing and performance analysis. If you don't understand
203 what was just said, you don't need it: say N.
204
205 Documentation on how to use the packet generator can be found
206 at <file:Documentation/networking/pktgen.txt>.
207
208 To compile this code as a module, choose M here: the
209 module will be called pktgen.
210
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700211config NET_TCPPROBE
212 tristate "TCP connection probing"
213 depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
214 ---help---
215 This module allows for capturing the changes to TCP connection
Dave Jones9dadaa192006-06-08 23:42:09 -0700216 state in response to incoming packets. It is used for debugging
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700217 TCP congestion avoidance modules. If you don't understand
218 what was just said, you don't need it: say N.
219
Grant Grundler82fe7c92006-09-25 23:47:14 -0700220 Documentation on how to use TCP connection probing can be found
Stephen Hemmingera42e9d62006-06-05 17:30:32 -0700221 at http://linux-net.osdl.org/index.php/TcpProbe
222
223 To compile this code as a module, choose M here: the
224 module will be called tcp_probe.
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226endmenu
227
228endmenu
229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230source "net/ax25/Kconfig"
Oliver Hartkopp0d665482007-11-16 15:52:17 -0800231source "net/can/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232source "net/irda/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233source "net/bluetooth/Kconfig"
David Howells17926a72007-04-26 15:48:28 -0700234source "net/rxrpc/Kconfig"
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100235
Thomas Graf14c0b972006-08-04 03:38:38 -0700236config FIB_RULES
237 bool
238
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700239menu "Wireless"
Martin Schwidefskyf54bfc02007-05-10 15:46:01 +0200240 depends on !S390
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700241
242source "net/wireless/Kconfig"
Jiri Bencf0706e822007-05-05 11:45:53 -0700243source "net/mac80211/Kconfig"
Johannes Berg2a5e1c02007-04-23 12:19:12 -0700244source "net/ieee80211/Kconfig"
245
246endmenu
247
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700248source "net/rfkill/Kconfig"
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -0500249source "net/9p/Kconfig"
Ivo van Doorncf4328c2007-05-07 00:34:20 -0700250
Sam Ravnborg6a2e9b72005-07-11 21:13:56 -0700251endif # if NET