net/ipv4/netfilter/Kconfig

   1 #
   2 # IP netfilter configuration
   3 #
   4
   5 menu "IP: Netfilter Configuration"
   6         depends on INET && NETFILTER
   7
   8 config NF_DEFRAG_IPV4
   9         tristate
  10         default n
  11
  12 config NF_CONNTRACK_IPV4
  13         tristate "IPv4 connection tracking support (required for NAT)"
  14         depends on NF_CONNTRACK
  15         default m if NETFILTER_ADVANCED=n
  16         select NF_DEFRAG_IPV4
  17         ---help---
  18           Connection tracking keeps a record of what packets have passed
  19           through your machine, in order to figure out how they are related
  20           into connections.
  21
  22           This is IPv4 support on Layer 3 independent connection tracking.
  23           Layer 3 independent connection tracking is experimental scheme
  24           which generalize ip_conntrack to support other layer 3 protocols.
  25
  26           To compile it as a module, choose M here.  If unsure, say N.
  27
  28 config NF_CONNTRACK_PROC_COMPAT
  29         bool "proc/sysctl compatibility with old connection tracking"
  30         depends on NF_CONNTRACK_PROCFS && NF_CONNTRACK_IPV4
  31         default y
  32         help
  33           This option enables /proc and sysctl compatibility with the old
  34           layer 3 dependent connection tracking. This is needed to keep
  35           old programs that have not been adapted to the new names working.
  36
  37           If unsure, say Y.
  38
  39 config IP_NF_IPTABLES
  40         tristate "IP tables support (required for filtering/masq/NAT)"
  41         default m if NETFILTER_ADVANCED=n
  42         select NETFILTER_XTABLES
  43         help
  44           iptables is a general, extensible packet identification framework.
  45           The packet filtering and full NAT (masquerading, port forwarding,
  46           etc) subsystems now use this: say `Y' or `M' here if you want to use
  47           either of those.
  48
  49           To compile it as a module, choose M here.  If unsure, say N.
  50
  51 if IP_NF_IPTABLES
  52
  53 # The matches.
  54 config IP_NF_MATCH_AH
  55         tristate '"ah" match support'
  56         depends on NETFILTER_ADVANCED
  57         help
  58           This match extension allows you to match a range of SPIs
  59           inside AH header of IPSec packets.
  60
  61           To compile it as a module, choose M here.  If unsure, say N.
  62
  63 config IP_NF_MATCH_ECN
  64         tristate '"ecn" match support'
  65         depends on NETFILTER_ADVANCED
  66         select NETFILTER_XT_MATCH_ECN
  67         ---help---
  68         This is a backwards-compat option for the user's convenience
  69         (e.g. when running oldconfig). It selects
  70         CONFIG_NETFILTER_XT_MATCH_ECN.
  71
  72 config IP_NF_MATCH_RPFILTER
  73         tristate '"rpfilter" reverse path filter match support'
  74         depends on NETFILTER_ADVANCED
  75         ---help---
  76           This option allows you to match packets whose replies would
  77           go out via the interface the packet came in.
  78
  79           To compile it as a module, choose M here.  If unsure, say N.
  80           The module will be called ipt_rpfilter.
  81
  82 config IP_NF_MATCH_TTL
  83         tristate '"ttl" match support'
  84         depends on NETFILTER_ADVANCED
  85         select NETFILTER_XT_MATCH_HL
  86         ---help---
  87         This is a backwards-compat option for the user's convenience
  88         (e.g. when running oldconfig). It selects
  89         CONFIG_NETFILTER_XT_MATCH_HL.
  90
  91 # `filter', generic and specific targets
  92 config IP_NF_FILTER
  93         tristate "Packet filtering"
  94         default m if NETFILTER_ADVANCED=n
  95         help
  96           Packet filtering defines a table `filter', which has a series of
  97           rules for simple packet filtering at local input, forwarding and
  98           local output.  See the man page for iptables(8).
  99
 100           To compile it as a module, choose M here.  If unsure, say N.
 101
 102 config IP_NF_TARGET_REJECT
 103         tristate "REJECT target support"
 104         depends on IP_NF_FILTER
 105         default m if NETFILTER_ADVANCED=n
 106         help
 107           The REJECT target allows a filtering rule to specify that an ICMP
 108           error should be issued in response to an incoming packet, rather
 109           than silently being dropped.
 110
 111           To compile it as a module, choose M here.  If unsure, say N.
 112
 113 config IP_NF_TARGET_ULOG
 114         tristate "ULOG target support"
 115         default m if NETFILTER_ADVANCED=n
 116         ---help---
 117
 118           This option enables the old IPv4-only "ipt_ULOG" implementation
 119           which has been obsoleted by the new "nfnetlink_log" code (see
 120           CONFIG_NETFILTER_NETLINK_LOG).
 121
 122           This option adds a `ULOG' target, which allows you to create rules in
 123           any iptables table. The packet is passed to a userspace logging
 124           daemon using netlink multicast sockets; unlike the LOG target
 125           which can only be viewed through syslog.
 126
 127           The appropriate userspace logging daemon (ulogd) may be obtained from
 128           <http://www.netfilter.org/projects/ulogd/index.html>
 129
 130           To compile it as a module, choose M here.  If unsure, say N.
 131
 132 # NAT + specific targets: nf_conntrack
 133 config NF_NAT_IPV4
 134         tristate "IPv4 NAT"
 135         depends on NF_CONNTRACK_IPV4
 136         default m if NETFILTER_ADVANCED=n
 137         select NF_NAT
 138         help
 139           The IPv4 NAT option allows masquerading, port forwarding and other
 140           forms of full Network Address Port Translation.  It is controlled by
 141           the `nat' table in iptables: see the man page for iptables(8).
 142
 143           To compile it as a module, choose M here.  If unsure, say N.
 144
 145 if NF_NAT_IPV4
 146
 147 config IP_NF_TARGET_MASQUERADE
 148         tristate "MASQUERADE target support"
 149         default m if NETFILTER_ADVANCED=n
 150         help
 151           Masquerading is a special case of NAT: all outgoing connections are
 152           changed to seem to come from a particular interface's address, and
 153           if the interface goes down, those connections are lost.  This is
 154           only useful for dialup accounts with dynamic IP address (ie. your IP
 155           address will be different on next dialup).
 156
 157           To compile it as a module, choose M here.  If unsure, say N.
 158
 159 config IP_NF_TARGET_NETMAP
 160         tristate "NETMAP target support"
 161         depends on NETFILTER_ADVANCED
 162         select NETFILTER_XT_TARGET_NETMAP
 163         ---help---
 164         This is a backwards-compat option for the user's convenience
 165         (e.g. when running oldconfig). It selects
 166         CONFIG_NETFILTER_XT_TARGET_NETMAP.
 167
 168 config IP_NF_TARGET_REDIRECT
 169         tristate "REDIRECT target support"
 170         depends on NETFILTER_ADVANCED
 171         select NETFILTER_XT_TARGET_REDIRECT
 172         ---help---
 173         This is a backwards-compat option for the user's convenience
 174         (e.g. when running oldconfig). It selects
 175         CONFIG_NETFILTER_XT_TARGET_REDIRECT.
 176
 177 endif
 178
 179 config NF_NAT_SNMP_BASIC
 180         tristate "Basic SNMP-ALG support"
 181         depends on NF_CONNTRACK_SNMP && NF_NAT_IPV4
 182         depends on NETFILTER_ADVANCED
 183         default NF_NAT && NF_CONNTRACK_SNMP
 184         ---help---
 185
 186           This module implements an Application Layer Gateway (ALG) for
 187           SNMP payloads.  In conjunction with NAT, it allows a network
 188           management system to access multiple private networks with
 189           conflicting addresses.  It works by modifying IP addresses
 190           inside SNMP payloads to match IP-layer NAT mapping.
 191
 192           This is the "basic" form of SNMP-ALG, as described in RFC 2962
 193
 194           To compile it as a module, choose M here.  If unsure, say N.
 195
 196 # If they want FTP, set to $CONFIG_IP_NF_NAT (m or y),
 197 # or $CONFIG_IP_NF_FTP (m or y), whichever is weaker.
 198 # From kconfig-language.txt:
 199 #
 200 #           <expr> '&&' <expr>                   (6)
 201 #
 202 # (6) Returns the result of min(/expr/, /expr/).
 203
 204 config NF_NAT_PROTO_GRE
 205         tristate
 206         depends on NF_NAT_IPV4 && NF_CT_PROTO_GRE
 207
 208 config NF_NAT_PPTP
 209         tristate
 210         depends on NF_CONNTRACK && NF_NAT_IPV4
 211         default NF_NAT_IPV4 && NF_CONNTRACK_PPTP
 212         select NF_NAT_PROTO_GRE
 213
 214 config NF_NAT_H323
 215         tristate
 216         depends on NF_CONNTRACK && NF_NAT_IPV4
 217         default NF_NAT_IPV4 && NF_CONNTRACK_H323
 218
 219 # mangle + specific targets
 220 config IP_NF_MANGLE
 221         tristate "Packet mangling"
 222         default m if NETFILTER_ADVANCED=n
 223         help
 224           This option adds a `mangle' table to iptables: see the man page for
 225           iptables(8).  This table is used for various packet alterations
 226           which can effect how the packet is routed.
 227
 228           To compile it as a module, choose M here.  If unsure, say N.
 229
 230 config IP_NF_TARGET_CLUSTERIP
 231         tristate "CLUSTERIP target support"
 232         depends on IP_NF_MANGLE
 233         depends on NF_CONNTRACK_IPV4
 234         depends on NETFILTER_ADVANCED
 235         select NF_CONNTRACK_MARK
 236         help
 237           The CLUSTERIP target allows you to build load-balancing clusters of
 238           network servers without having a dedicated load-balancing
 239           router/server/switch.
 240
 241           To compile it as a module, choose M here.  If unsure, say N.
 242
 243 config IP_NF_TARGET_ECN
 244         tristate "ECN target support"
 245         depends on IP_NF_MANGLE
 246         depends on NETFILTER_ADVANCED
 247         ---help---
 248           This option adds a `ECN' target, which can be used in the iptables mangle
 249           table.
 250
 251           You can use this target to remove the ECN bits from the IPv4 header of
 252           an IP packet.  This is particularly useful, if you need to work around
 253           existing ECN blackholes on the internet, but don't want to disable
 254           ECN support in general.
 255
 256           To compile it as a module, choose M here.  If unsure, say N.
 257
 258 config IP_NF_TARGET_TTL
 259         tristate '"TTL" target support'
 260         depends on NETFILTER_ADVANCED && IP_NF_MANGLE
 261         select NETFILTER_XT_TARGET_HL
 262         ---help---
 263         This is a backwards-compatible option for the user's convenience
 264         (e.g. when running oldconfig). It selects
 265         CONFIG_NETFILTER_XT_TARGET_HL.
 266
 267 # raw + specific targets
 268 config IP_NF_RAW
 269         tristate  'raw table support (required for NOTRACK/TRACE)'
 270         help
 271           This option adds a `raw' table to iptables. This table is the very
 272           first in the netfilter framework and hooks in at the PREROUTING
 273           and OUTPUT chains.
 274
 275           If you want to compile it as a module, say M here and read
 276           <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
 277
 278 # security table for MAC policy
 279 config IP_NF_SECURITY
 280         tristate "Security table"
 281         depends on SECURITY
 282         depends on NETFILTER_ADVANCED
 283         help
 284           This option adds a `security' table to iptables, for use
 285           with Mandatory Access Control (MAC) policy.
 286
 287           If unsure, say N.
 288
 289 endif # IP_NF_IPTABLES
 290
 291 # ARP tables
 292 config IP_NF_ARPTABLES
 293         tristate "ARP tables support"
 294         select NETFILTER_XTABLES
 295         depends on NETFILTER_ADVANCED
 296         help
 297           arptables is a general, extensible packet identification framework.
 298           The ARP packet filtering and mangling (manipulation)subsystems
 299           use this: say Y or M here if you want to use either of those.
 300
 301           To compile it as a module, choose M here.  If unsure, say N.
 302
 303 if IP_NF_ARPTABLES
 304
 305 config IP_NF_ARPFILTER
 306         tristate "ARP packet filtering"
 307         help
 308           ARP packet filtering defines a table `filter', which has a series of
 309           rules for simple ARP packet filtering at local input and
 310           local output.  On a bridge, you can also specify filtering rules
 311           for forwarded ARP packets. See the man page for arptables(8).
 312
 313           To compile it as a module, choose M here.  If unsure, say N.
 314
 315 config IP_NF_ARP_MANGLE
 316         tristate "ARP payload mangling"
 317         help
 318           Allows altering the ARP packet payload: source and destination
 319           hardware and network addresses.
 320
 321 endif # IP_NF_ARPTABLES
 322
 323 endmenu
 324