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_QUEUE
  40         tristate "IP Userspace queueing via NETLINK (OBSOLETE)"
  41         depends on NETFILTER_ADVANCED
  42         help
  43           Netfilter has the ability to queue packets to user space: the
  44           netlink device can be used to access them using this driver.
  45
  46           This option enables the old IPv4-only "ip_queue" implementation
  47           which has been obsoleted by the new "nfnetlink_queue" code (see
  48           CONFIG_NETFILTER_NETLINK_QUEUE).
  49
  50           To compile it as a module, choose M here.  If unsure, say N.
  51
  52 config IP_NF_IPTABLES
  53         tristate "IP tables support (required for filtering/masq/NAT)"
  54         default m if NETFILTER_ADVANCED=n
  55         select NETFILTER_XTABLES
  56         help
  57           iptables is a general, extensible packet identification framework.
  58           The packet filtering and full NAT (masquerading, port forwarding,
  59           etc) subsystems now use this: say `Y' or `M' here if you want to use
  60           either of those.
  61
  62           To compile it as a module, choose M here.  If unsure, say N.
  63
  64 if IP_NF_IPTABLES
  65
  66 # The matches.
  67 config IP_NF_MATCH_AH
  68         tristate '"ah" match support'
  69         depends on NETFILTER_ADVANCED
  70         help
  71           This match extension allows you to match a range of SPIs
  72           inside AH header of IPSec packets.
  73
  74           To compile it as a module, choose M here.  If unsure, say N.
  75
  76 config IP_NF_MATCH_ECN
  77         tristate '"ecn" match support'
  78         depends on NETFILTER_ADVANCED
  79         select NETFILTER_XT_MATCH_ECN
  80         ---help---
  81         This is a backwards-compat option for the user's convenience
  82         (e.g. when running oldconfig). It selects
  83         CONFIG_NETFILTER_XT_MATCH_ECN.
  84
  85 config IP_NF_MATCH_RPFILTER
  86         tristate '"rpfilter" reverse path filter match support'
  87         depends on NETFILTER_ADVANCED
  88         ---help---
  89           This option allows you to match packets whose replies would
  90           go out via the interface the packet came in.
  91
  92           To compile it as a module, choose M here.  If unsure, say N.
  93           The module will be called ipt_rpfilter.
  94
  95 config IP_NF_MATCH_TTL
  96         tristate '"ttl" match support'
  97         depends on NETFILTER_ADVANCED
  98         select NETFILTER_XT_MATCH_HL
  99         ---help---
 100         This is a backwards-compat option for the user's convenience
 101         (e.g. when running oldconfig). It selects
 102         CONFIG_NETFILTER_XT_MATCH_HL.
 103
 104 # `filter', generic and specific targets
 105 config IP_NF_FILTER
 106         tristate "Packet filtering"
 107         default m if NETFILTER_ADVANCED=n
 108         help
 109           Packet filtering defines a table `filter', which has a series of
 110           rules for simple packet filtering at local input, forwarding and
 111           local output.  See the man page for iptables(8).
 112
 113           To compile it as a module, choose M here.  If unsure, say N.
 114
 115 config IP_NF_TARGET_REJECT
 116         tristate "REJECT target support"
 117         depends on IP_NF_FILTER
 118         default m if NETFILTER_ADVANCED=n
 119         help
 120           The REJECT target allows a filtering rule to specify that an ICMP
 121           error should be issued in response to an incoming packet, rather
 122           than silently being dropped.
 123
 124           To compile it as a module, choose M here.  If unsure, say N.
 125
 126 config IP_NF_TARGET_ULOG
 127         tristate "ULOG target support"
 128         default m if NETFILTER_ADVANCED=n
 129         ---help---
 130
 131           This option enables the old IPv4-only "ipt_ULOG" implementation
 132           which has been obsoleted by the new "nfnetlink_log" code (see
 133           CONFIG_NETFILTER_NETLINK_LOG).
 134
 135           This option adds a `ULOG' target, which allows you to create rules in
 136           any iptables table. The packet is passed to a userspace logging
 137           daemon using netlink multicast sockets; unlike the LOG target
 138           which can only be viewed through syslog.
 139
 140           The appropriate userspace logging daemon (ulogd) may be obtained from
 141           <http://www.netfilter.org/projects/ulogd/index.html>
 142
 143           To compile it as a module, choose M here.  If unsure, say N.
 144
 145 # NAT + specific targets: nf_conntrack
 146 config NF_NAT_IPV4
 147         tristate "IPv4 NAT"
 148         depends on NF_CONNTRACK_IPV4
 149         default m if NETFILTER_ADVANCED=n
 150         select NF_NAT
 151         help
 152           The IPv4 NAT option allows masquerading, port forwarding and other
 153           forms of full Network Address Port Translation.  It is controlled by
 154           the `nat' table in iptables: see the man page for iptables(8).
 155
 156           To compile it as a module, choose M here.  If unsure, say N.
 157
 158 if NF_NAT_IPV4
 159
 160 config IP_NF_TARGET_MASQUERADE
 161         tristate "MASQUERADE target support"
 162         default m if NETFILTER_ADVANCED=n
 163         help
 164           Masquerading is a special case of NAT: all outgoing connections are
 165           changed to seem to come from a particular interface's address, and
 166           if the interface goes down, those connections are lost.  This is
 167           only useful for dialup accounts with dynamic IP address (ie. your IP
 168           address will be different on next dialup).
 169
 170           To compile it as a module, choose M here.  If unsure, say N.
 171
 172 config IP_NF_TARGET_NETMAP
 173         tristate "NETMAP target support"
 174         depends on NETFILTER_ADVANCED
 175         select NETFILTER_XT_TARGET_NETMAP
 176         ---help---
 177         This is a backwards-compat option for the user's convenience
 178         (e.g. when running oldconfig). It selects
 179         CONFIG_NETFILTER_XT_TARGET_NETMAP.
 180
 181 config IP_NF_TARGET_REDIRECT
 182         tristate "REDIRECT target support"
 183         depends on NETFILTER_ADVANCED
 184         select NETFILTER_XT_TARGET_REDIRECT
 185         ---help---
 186         This is a backwards-compat option for the user's convenience
 187         (e.g. when running oldconfig). It selects
 188         CONFIG_NETFILTER_XT_TARGET_REDIRECT.
 189
 190 endif
 191
 192 config NF_NAT_SNMP_BASIC
 193         tristate "Basic SNMP-ALG support"
 194         depends on NF_CONNTRACK_SNMP && NF_NAT_IPV4
 195         depends on NETFILTER_ADVANCED
 196         default NF_NAT && NF_CONNTRACK_SNMP
 197         ---help---
 198
 199           This module implements an Application Layer Gateway (ALG) for
 200           SNMP payloads.  In conjunction with NAT, it allows a network
 201           management system to access multiple private networks with
 202           conflicting addresses.  It works by modifying IP addresses
 203           inside SNMP payloads to match IP-layer NAT mapping.
 204
 205           This is the "basic" form of SNMP-ALG, as described in RFC 2962
 206
 207           To compile it as a module, choose M here.  If unsure, say N.
 208
 209 # If they want FTP, set to $CONFIG_IP_NF_NAT (m or y),
 210 # or $CONFIG_IP_NF_FTP (m or y), whichever is weaker.
 211 # From kconfig-language.txt:
 212 #
 213 #           <expr> '&&' <expr>                   (6)
 214 #
 215 # (6) Returns the result of min(/expr/, /expr/).
 216
 217 config NF_NAT_PROTO_GRE
 218         tristate
 219         depends on NF_NAT_IPV4 && NF_CT_PROTO_GRE
 220
 221 config NF_NAT_PPTP
 222         tristate
 223         depends on NF_CONNTRACK && NF_NAT_IPV4
 224         default NF_NAT_IPV4 && NF_CONNTRACK_PPTP
 225         select NF_NAT_PROTO_GRE
 226
 227 config NF_NAT_H323
 228         tristate
 229         depends on NF_CONNTRACK && NF_NAT_IPV4
 230         default NF_NAT_IPV4 && NF_CONNTRACK_H323
 231
 232 # mangle + specific targets
 233 config IP_NF_MANGLE
 234         tristate "Packet mangling"
 235         default m if NETFILTER_ADVANCED=n
 236         help
 237           This option adds a `mangle' table to iptables: see the man page for
 238           iptables(8).  This table is used for various packet alterations
 239           which can effect how the packet is routed.
 240
 241           To compile it as a module, choose M here.  If unsure, say N.
 242
 243 config IP_NF_TARGET_CLUSTERIP
 244         tristate "CLUSTERIP target support"
 245         depends on IP_NF_MANGLE
 246         depends on NF_CONNTRACK_IPV4
 247         depends on NETFILTER_ADVANCED
 248         select NF_CONNTRACK_MARK
 249         help
 250           The CLUSTERIP target allows you to build load-balancing clusters of
 251           network servers without having a dedicated load-balancing
 252           router/server/switch.
 253
 254           To compile it as a module, choose M here.  If unsure, say N.
 255
 256 config IP_NF_TARGET_ECN
 257         tristate "ECN target support"
 258         depends on IP_NF_MANGLE
 259         depends on NETFILTER_ADVANCED
 260         ---help---
 261           This option adds a `ECN' target, which can be used in the iptables mangle
 262           table.
 263
 264           You can use this target to remove the ECN bits from the IPv4 header of
 265           an IP packet.  This is particularly useful, if you need to work around
 266           existing ECN blackholes on the internet, but don't want to disable
 267           ECN support in general.
 268
 269           To compile it as a module, choose M here.  If unsure, say N.
 270
 271 config IP_NF_TARGET_TTL
 272         tristate '"TTL" target support'
 273         depends on NETFILTER_ADVANCED && IP_NF_MANGLE
 274         select NETFILTER_XT_TARGET_HL
 275         ---help---
 276         This is a backwards-compatible option for the user's convenience
 277         (e.g. when running oldconfig). It selects
 278         CONFIG_NETFILTER_XT_TARGET_HL.
 279
 280 # raw + specific targets
 281 config IP_NF_RAW
 282         tristate  'raw table support (required for NOTRACK/TRACE)'
 283         help
 284           This option adds a `raw' table to iptables. This table is the very
 285           first in the netfilter framework and hooks in at the PREROUTING
 286           and OUTPUT chains.
 287
 288           If you want to compile it as a module, say M here and read
 289           <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.
 290
 291 # security table for MAC policy
 292 config IP_NF_SECURITY
 293         tristate "Security table"
 294         depends on SECURITY
 295         depends on NETFILTER_ADVANCED
 296         help
 297           This option adds a `security' table to iptables, for use
 298           with Mandatory Access Control (MAC) policy.
 299
 300           If unsure, say N.
 301
 302 endif # IP_NF_IPTABLES
 303
 304 # ARP tables
 305 config IP_NF_ARPTABLES
 306         tristate "ARP tables support"
 307         select NETFILTER_XTABLES
 308         depends on NETFILTER_ADVANCED
 309         help
 310           arptables is a general, extensible packet identification framework.
 311           The ARP packet filtering and mangling (manipulation)subsystems
 312           use this: say Y or M here if you want to use either of those.
 313
 314           To compile it as a module, choose M here.  If unsure, say N.
 315
 316 if IP_NF_ARPTABLES
 317
 318 config IP_NF_ARPFILTER
 319         tristate "ARP packet filtering"
 320         help
 321           ARP packet filtering defines a table `filter', which has a series of
 322           rules for simple ARP packet filtering at local input and
 323           local output.  On a bridge, you can also specify filtering rules
 324           for forwarded ARP packets. See the man page for arptables(8).
 325
 326           To compile it as a module, choose M here.  If unsure, say N.
 327
 328 config IP_NF_ARP_MANGLE
 329         tristate "ARP payload mangling"
 330         help
 331           Allows altering the ARP packet payload: source and destination
 332           hardware and network addresses.
 333
 334 endif # IP_NF_ARPTABLES
 335
 336 endmenu
 337