xref: /linux-6.15/net/bridge/netfilter/Kconfig (revision 6c959fd5)

# SPDX-License-Identifier: GPL-2.0-only
#
# Bridge netfilter configuration
#
#
menuconfig NF_TABLES_BRIDGE
	depends on BRIDGE && NETFILTER && NF_TABLES
	select NETFILTER_FAMILY_BRIDGE
	tristate "Ethernet Bridge nf_tables support"

if NF_TABLES_BRIDGE

config NFT_BRIDGE_META
	tristate "Netfilter nf_table bridge meta support"
	help
	  Add support for bridge dedicated meta key.

config NFT_BRIDGE_REJECT
	tristate "Netfilter nf_tables bridge reject support"
	depends on NFT_REJECT
	depends on NF_REJECT_IPV4
	depends on NF_REJECT_IPV6
	help
	  Add support to reject packets.

endif # NF_TABLES_BRIDGE

config NF_CONNTRACK_BRIDGE
	tristate "IPv4/IPV6 bridge connection tracking support"
	depends on NF_CONNTRACK
	default n
	help
	  Connection tracking keeps a record of what packets have passed
	  through your machine, in order to figure out how they are related
	  into connections. This is used to enhance packet filtering via
	  stateful policies. Enable this if you want native tracking from
	  the bridge. This provides a replacement for the `br_netfilter'
	  infrastructure.

	  To compile it as a module, choose M here.  If unsure, say N.

# old sockopt interface and eval loop
config BRIDGE_NF_EBTABLES_LEGACY
	tristate "Legacy EBTABLES support"
	depends on BRIDGE && NETFILTER_XTABLES
	default n
	help
	 Legacy ebtables packet/frame classifier.
	 This is not needed if you are using ebtables over nftables
	 (iptables-nft).

menuconfig BRIDGE_NF_EBTABLES
	tristate "Ethernet Bridge tables (ebtables) support"
	depends on BRIDGE && NETFILTER && NETFILTER_XTABLES
	select NETFILTER_FAMILY_BRIDGE
	help
	  ebtables is a general, extensible frame/packet identification
	  framework. Say 'Y' or 'M' here if you want to do Ethernet
	  filtering/NAT/brouting on the Ethernet bridge.

if BRIDGE_NF_EBTABLES

#
# tables
#
config BRIDGE_EBT_BROUTE
	tristate "ebt: broute table support"
	select BRIDGE_NF_EBTABLES_LEGACY
	help
	  The ebtables broute table is used to define rules that decide between
	  bridging and routing frames, giving Linux the functionality of a
	  brouter. See the man page for ebtables(8) and examples on the ebtables
	  website.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_T_FILTER
	tristate "ebt: filter table support"
	select BRIDGE_NF_EBTABLES_LEGACY
	help
	  The ebtables filter table is used to define frame filtering rules at
	  local input, forwarding and local output. See the man page for
	  ebtables(8).

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_T_NAT
	tristate "ebt: nat table support"
	select BRIDGE_NF_EBTABLES_LEGACY
	help
	  The ebtables nat table is used to define rules that alter the MAC
	  source address (MAC SNAT) or the MAC destination address (MAC DNAT).
	  See the man page for ebtables(8).

	  To compile it as a module, choose M here.  If unsure, say N.
#
# matches
#
config BRIDGE_EBT_802_3
	tristate "ebt: 802.3 filter support"
	help
	  This option adds matching support for 802.3 Ethernet frames.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_AMONG
	tristate "ebt: among filter support"
	help
	  This option adds the among match, which allows matching the MAC source
	  and/or destination address on a list of addresses. Optionally,
	  MAC/IP address pairs can be matched, f.e. for anti-spoofing rules.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_ARP
	tristate "ebt: ARP filter support"
	help
	  This option adds the ARP match, which allows ARP and RARP header field
	  filtering.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_IP
	tristate "ebt: IP filter support"
	help
	  This option adds the IP match, which allows basic IP header field
	  filtering.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_IP6
	tristate "ebt: IP6 filter support"
	depends on BRIDGE_NF_EBTABLES && IPV6
	help
	  This option adds the IP6 match, which allows basic IPV6 header field
	  filtering.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_LIMIT
	tristate "ebt: limit match support"
	help
	  This option adds the limit match, which allows you to control
	  the rate at which a rule can be matched. This match is the
	  equivalent of the iptables limit match.

	  If you want to compile it as a module, say M here and read
	  <file:Documentation/kbuild/modules.rst>.  If unsure, say `N'.

config BRIDGE_EBT_MARK
	tristate "ebt: mark filter support"
	help
	  This option adds the mark match, which allows matching frames based on
	  the 'nfmark' value in the frame. This can be set by the mark target.
	  This value is the same as the one used in the iptables mark match and
	  target.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_PKTTYPE
	tristate "ebt: packet type filter support"
	help
	  This option adds the packet type match, which allows matching on the
	  type of packet based on its Ethernet "class" (as determined by
	  the generic networking code): broadcast, multicast,
	  for this host alone or for another host.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_STP
	tristate "ebt: STP filter support"
	help
	  This option adds the Spanning Tree Protocol match, which
	  allows STP header field filtering.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_VLAN
	tristate "ebt: 802.1Q VLAN filter support"
	help
	  This option adds the 802.1Q vlan match, which allows the filtering of
	  802.1Q vlan fields.

	  To compile it as a module, choose M here.  If unsure, say N.
#
# targets
#
config BRIDGE_EBT_ARPREPLY
	tristate "ebt: arp reply target support"
	depends on BRIDGE_NF_EBTABLES && INET
	help
	  This option adds the arp reply target, which allows
	  automatically sending arp replies to arp requests.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_DNAT
	tristate "ebt: dnat target support"
	help
	  This option adds the MAC DNAT target, which allows altering the MAC
	  destination address of frames.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_MARK_T
	tristate "ebt: mark target support"
	help
	  This option adds the mark target, which allows marking frames by
	  setting the 'nfmark' value in the frame.
	  This value is the same as the one used in the iptables mark match and
	  target.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_REDIRECT
	tristate "ebt: redirect target support"
	help
	  This option adds the MAC redirect target, which allows altering the MAC
	  destination address of a frame to that of the device it arrived on.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_SNAT
	tristate "ebt: snat target support"
	help
	  This option adds the MAC SNAT target, which allows altering the MAC
	  source address of frames.

	  To compile it as a module, choose M here.  If unsure, say N.
#
# watchers
#
config BRIDGE_EBT_LOG
	tristate "ebt: log support"
	help
	  This option adds the log watcher, that you can use in any rule
	  in any ebtables table. It records info about the frame header
	  to the syslog.

	  To compile it as a module, choose M here.  If unsure, say N.

config BRIDGE_EBT_NFLOG
	tristate "ebt: nflog support"
	help
	  This option enables the nflog watcher, which allows to LOG
	  messages through the netfilter logging API, which can use
	  either the old LOG target, the old ULOG target or nfnetlink_log
	  as backend.

	  This option adds the nflog watcher, that you can use in any rule
	  in any ebtables table.

	  To compile it as a module, choose M here.  If unsure, say N.

endif # BRIDGE_NF_EBTABLES