net/Kconfig

   1 #
   2 # Network configuration
   3 #
   4
   5 menuconfig NET
   6         bool "Networking support"
   7         select NLATTR
   8         ---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
  12           other computer.
  13
  14           If you are upgrading from an older kernel, you
  15           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
  24 if NET
  25
  26 menu "Networking options"
  27
  28 config COMPAT_NET_DEV_OPS
  29        def_bool y
  30
  31 source "net/packet/Kconfig"
  32 source "net/unix/Kconfig"
  33 source "net/xfrm/Kconfig"
  34 source "net/iucv/Kconfig"
  35
  36 config INET
  37         bool "TCP/IP networking"
  38         ---help---
  39           These are the protocols used on the Internet and on most local
  40           Ethernets. It is highly recommended to say Y here (this will enlarge
  41           your kernel by about 400 KB), since some programs (e.g. the X window
  42           system) use TCP/IP even if your machine is not connected to any
  43           other computer. You will get the so-called loopback device which
  44           allows you to ping yourself (great fun, that!).
  45
  46           For an excellent introduction to Linux networking, please read the
  47           Linux Networking HOWTO, available from
  48           <http://www.tldp.org/docs.html#howto>.
  49
  50           If you say Y here and also to "/proc file system support" and
  51           "Sysctl support" below, you can change various aspects of the
  52           behavior of the TCP/IP code by writing to the (virtual) files in
  53           /proc/sys/net/ipv4/*; the options are explained in the file
  54           <file:Documentation/networking/ip-sysctl.txt>.
  55
  56           Short answer: say Y.
  57
  58 if INET
  59 source "net/ipv4/Kconfig"
  60 source "net/ipv6/Kconfig"
  61 source "net/netlabel/Kconfig"
  62
  63 endif # if INET
  64
  65 config NETWORK_SECMARK
  66         bool "Security Marking"
  67         help
  68           This enables security marking of network packets, similar
  69           to nfmark, but designated for security purposes.
  70           If you are unsure how to answer this question, answer N.
  71
  72 menuconfig NETFILTER
  73         bool "Network packet filtering framework (Netfilter)"
  74         ---help---
  75           Netfilter is a framework for filtering and mangling network packets
  76           that pass through your Linux box.
  77
  78           The most common use of packet filtering is to run your Linux box as
  79           a firewall protecting a local network from the Internet. The type of
  80           firewall provided by this kernel support is called a "packet
  81           filter", which means that it can reject individual network packets
  82           based on type, source, destination etc. The other kind of firewall,
  83           a "proxy-based" one, is more secure but more intrusive and more
  84           bothersome to set up; it inspects the network traffic much more
  85           closely, modifies it and has knowledge about the higher level
  86           protocols, which a packet filter lacks. Moreover, proxy-based
  87           firewalls often require changes to the programs running on the local
  88           clients. Proxy-based firewalls don't need support by the kernel, but
  89           they are often combined with a packet filter, which only works if
  90           you say Y here.
  91
  92           You should also say Y here if you intend to use your Linux box as
  93           the gateway to the Internet for a local network of machines without
  94           globally valid IP addresses. This is called "masquerading": if one
  95           of the computers on your local network wants to send something to
  96           the outside, your box can "masquerade" as that computer, i.e. it
  97           forwards the traffic to the intended outside destination, but
  98           modifies the packets to make it look like they came from the
  99           firewall box itself. It works both ways: if the outside host
 100           replies, the Linux box will silently forward the traffic to the
 101           correct local computer. This way, the computers on your local net
 102           are completely invisible to the outside world, even though they can
 103           reach the outside and can receive replies. It is even possible to
 104           run globally visible servers from within a masqueraded local network
 105           using a mechanism called portforwarding. Masquerading is also often
 106           called NAT (Network Address Translation).
 107
 108           Another use of Netfilter is in transparent proxying: if a machine on
 109           the local network tries to connect to an outside host, your Linux
 110           box can transparently forward the traffic to a local server,
 111           typically a caching proxy server.
 112
 113           Yet another use of Netfilter is building a bridging firewall. Using
 114           a bridge with Network packet filtering enabled makes iptables "see"
 115           the bridged traffic. For filtering on the lower network and Ethernet
 116           protocols over the bridge, use ebtables (under bridge netfilter
 117           configuration).
 118
 119           Various modules exist for netfilter which replace the previous
 120           masquerading (ipmasqadm), packet filtering (ipchains), transparent
 121           proxying, and portforwarding mechanisms. Please see
 122           <file:Documentation/Changes> under "iptables" for the location of
 123           these packages.
 124
 125           Make sure to say N to "Fast switching" below if you intend to say Y
 126           here, as Fast switching currently bypasses netfilter.
 127
 128           Chances are that you should say Y here if you compile a kernel which
 129           will run as a router and N for regular hosts. If unsure, say N.
 130
 131 if NETFILTER
 132
 133 config NETFILTER_DEBUG
 134         bool "Network packet filtering debugging"
 135         depends on NETFILTER
 136         help
 137           You can say Y here if you want to get additional messages useful in
 138           debugging the netfilter code.
 139
 140 config NETFILTER_ADVANCED
 141         bool "Advanced netfilter configuration"
 142         depends on NETFILTER
 143         default y
 144         help
 145           If you say Y here you can select between all the netfilter modules.
 146           If you say N the more ununsual ones will not be shown and the
 147           basic ones needed by most people will default to 'M'.
 148
 149           If unsure, say Y.
 150
 151 config BRIDGE_NETFILTER
 152         bool "Bridged IP/ARP packets filtering"
 153         depends on BRIDGE && NETFILTER && INET
 154         depends on NETFILTER_ADVANCED
 155         default y
 156         ---help---
 157           Enabling this option will let arptables resp. iptables see bridged
 158           ARP resp. IP traffic. If you want a bridging firewall, you probably
 159           want this option enabled.
 160           Enabling or disabling this option doesn't enable or disable
 161           ebtables.
 162
 163           If unsure, say N.
 164
 165 source "net/netfilter/Kconfig"
 166 source "net/ipv4/netfilter/Kconfig"
 167 source "net/ipv6/netfilter/Kconfig"
 168 source "net/decnet/netfilter/Kconfig"
 169 source "net/bridge/netfilter/Kconfig"
 170
 171 endif
 172
 173 source "net/dccp/Kconfig"
 174 source "net/sctp/Kconfig"
 175 source "net/tipc/Kconfig"
 176 source "net/atm/Kconfig"
 177 source "net/802/Kconfig"
 178 source "net/bridge/Kconfig"
 179 source "net/dsa/Kconfig"
 180 source "net/8021q/Kconfig"
 181 source "net/decnet/Kconfig"
 182 source "net/llc/Kconfig"
 183 source "net/ipx/Kconfig"
 184 source "drivers/net/appletalk/Kconfig"
 185 source "net/x25/Kconfig"
 186 source "net/lapb/Kconfig"
 187 source "net/econet/Kconfig"
 188 source "net/wanrouter/Kconfig"
 189 source "net/sched/Kconfig"
 190 source "net/dcb/Kconfig"
 191
 192 menu "Network testing"
 193
 194 config NET_PKTGEN
 195         tristate "Packet Generator (USE WITH CAUTION)"
 196         depends on PROC_FS
 197         ---help---
 198           This module will inject preconfigured packets, at a configurable
 199           rate, out of a given interface.  It is used for network interface
 200           stress testing and performance analysis.  If you don't understand
 201           what was just said, you don't need it: say N.
 202
 203           Documentation on how to use the packet generator can be found
 204           at <file:Documentation/networking/pktgen.txt>.
 205
 206           To compile this code as a module, choose M here: the
 207           module will be called pktgen.
 208
 209 config NET_TCPPROBE
 210         tristate "TCP connection probing"
 211         depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
 212         ---help---
 213         This module allows for capturing the changes to TCP connection
 214         state in response to incoming packets. It is used for debugging
 215         TCP congestion avoidance modules. If you don't understand
 216         what was just said, you don't need it: say N.
 217
 218         Documentation on how to use TCP connection probing can be found
 219         at http://linux-net.osdl.org/index.php/TcpProbe
 220
 221         To compile this code as a module, choose M here: the
 222         module will be called tcp_probe.
 223
 224 endmenu
 225
 226 endmenu
 227
 228 source "net/ax25/Kconfig"
 229 source "net/can/Kconfig"
 230 source "net/irda/Kconfig"
 231 source "net/bluetooth/Kconfig"
 232 source "net/rxrpc/Kconfig"
 233 source "net/phonet/Kconfig"
 234
 235 config FIB_RULES
 236         bool
 237
 238 menuconfig WIRELESS
 239         bool "Wireless"
 240         depends on !S390
 241         default y
 242
 243 if WIRELESS
 244
 245 source "net/wireless/Kconfig"
 246 source "net/mac80211/Kconfig"
 247
 248 endif # WIRELESS
 249
 250 source "net/wimax/Kconfig"
 251
 252 source "net/rfkill/Kconfig"
 253 source "net/9p/Kconfig"
 254
 255 endif   # if NET