kconfig

linux 内核源代码

	tristate  '"TRACE" target support'
	depends on NETFILTER_XTABLES
	depends on IP_NF_RAW || IP6_NF_RAW
	help
	  The TRACE target allows you to mark packets so that the kernel
	  will log every rule which match the packets as those traverse
	  the tables, chains, rules.

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

config NETFILTER_XT_TARGET_SECMARK
	tristate '"SECMARK" target support'
	depends on NETFILTER_XTABLES && NETWORK_SECMARK
	help
	  The SECMARK target allows security marking of network
	  packets, for use with security subsystems.

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

config NETFILTER_XT_TARGET_CONNSECMARK
	tristate '"CONNSECMARK" target support'
	depends on NETFILTER_XTABLES && NF_CONNTRACK && NF_CONNTRACK_SECMARK
	help
	  The CONNSECMARK target copies security markings from packets
	  to connections, and restores security markings from connections
	  to packets (if the packets are not already marked).  This would
	  normally be used in conjunction with the SECMARK target.

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

config NETFILTER_XT_TARGET_TCPMSS
	tristate '"TCPMSS" target support'
	depends on NETFILTER_XTABLES && (IPV6 || IPV6=n)
	---help---
	  This option adds a `TCPMSS' target, which allows you to alter the
	  MSS value of TCP SYN packets, to control the maximum size for that
	  connection (usually limiting it to your outgoing interface's MTU
	  minus 40).

	  This is used to overcome criminally braindead ISPs or servers which
	  block ICMP Fragmentation Needed packets.  The symptoms of this
	  problem are that everything works fine from your Linux
	  firewall/router, but machines behind it can never exchange large
	  packets:
	        1) Web browsers connect, then hang with no data received.
	        2) Small mail works fine, but large emails hang.
	        3) ssh works fine, but scp hangs after initial handshaking.

	  Workaround: activate this option and add a rule to your firewall
	  configuration like:

	  iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN \
	                 -j TCPMSS --clamp-mss-to-pmtu

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

config NETFILTER_XT_MATCH_COMMENT
	tristate  '"comment" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `comment' dummy-match, which allows you to put
	  comments in your iptables ruleset.

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

config NETFILTER_XT_MATCH_CONNBYTES
	tristate  '"connbytes" per-connection counter match support'
	depends on NETFILTER_XTABLES
	depends on NF_CONNTRACK
	select NF_CT_ACCT
	help
	  This option adds a `connbytes' match, which allows you to match the
	  number of bytes and/or packets for each direction within a connection.

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

config NETFILTER_XT_MATCH_CONNLIMIT
	tristate '"connlimit" match support"'
	depends on NETFILTER_XTABLES
	depends on NF_CONNTRACK
	---help---
	  This match allows you to match against the number of parallel
	  connections to a server per client IP address (or address block).

config NETFILTER_XT_MATCH_CONNMARK
	tristate  '"connmark" connection mark match support'
	depends on NETFILTER_XTABLES
	depends on NF_CONNTRACK
	select NF_CONNTRACK_MARK
	help
	  This option adds a `connmark' match, which allows you to match the
	  connection mark value previously set for the session by `CONNMARK'. 
	
	  If you want to compile it as a module, say M here and read
	  <file:Documentation/kbuild/modules.txt>.  The module will be called
	  ipt_connmark.ko.  If unsure, say `N'.

config NETFILTER_XT_MATCH_CONNTRACK
	tristate '"conntrack" connection tracking match support'
	depends on NETFILTER_XTABLES
	depends on NF_CONNTRACK
	help
	  This is a general conntrack match module, a superset of the state match.

	  It allows matching on additional conntrack information, which is
	  useful in complex configurations, such as NAT gateways with multiple
	  internet links or tunnels.

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

config NETFILTER_XT_MATCH_DCCP
	tristate  '"DCCP" protocol match support'
	depends on NETFILTER_XTABLES
	help
	  With this option enabled, you will be able to use the iptables
	  `dccp' match in order to match on DCCP source/destination ports
	  and DCCP flags.

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

config NETFILTER_XT_MATCH_DSCP
	tristate '"DSCP" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `DSCP' match, which allows you to match against
	  the IPv4/IPv6 header DSCP field (differentiated services codepoint).

	  The DSCP field can have any value between 0x0 and 0x3f inclusive.

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

config NETFILTER_XT_MATCH_ESP
	tristate '"ESP" match support'
	depends on NETFILTER_XTABLES
	help
	  This match extension allows you to match a range of SPIs
	  inside ESP header of IPSec packets.

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

config NETFILTER_XT_MATCH_HELPER
	tristate '"helper" match support'
	depends on NETFILTER_XTABLES
	depends on NF_CONNTRACK
	help
	  Helper matching allows you to match packets in dynamic connections
	  tracked by a conntrack-helper, ie. ip_conntrack_ftp

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

config NETFILTER_XT_MATCH_LENGTH
	tristate '"length" match support'
	depends on NETFILTER_XTABLES
	help
	  This option allows you to match the length of a packet against a
	  specific value or range of values.

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

config NETFILTER_XT_MATCH_LIMIT
	tristate '"limit" match support'
	depends on NETFILTER_XTABLES
	help
	  limit matching allows you to control the rate at which a rule can be
	  matched: mainly useful in combination with the LOG target ("LOG
	  target support", below) and to avoid some Denial of Service attacks.

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

config NETFILTER_XT_MATCH_MAC
	tristate '"mac" address match support'
	depends on NETFILTER_XTABLES
	help
	  MAC matching allows you to match packets based on the source
	  Ethernet address of the packet.

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

config NETFILTER_XT_MATCH_MARK
	tristate '"mark" match support'
	depends on NETFILTER_XTABLES
	help
	  Netfilter mark matching allows you to match packets based on the
	  `nfmark' value in the packet.  This can be set by the MARK target
	  (see below).

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

config NETFILTER_XT_MATCH_POLICY
	tristate 'IPsec "policy" match support'
	depends on NETFILTER_XTABLES && XFRM
	help
	  Policy matching allows you to match packets based on the
	  IPsec policy that was used during decapsulation/will
	  be used during encapsulation.

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

config NETFILTER_XT_MATCH_MULTIPORT
	tristate "Multiple port match support"
	depends on NETFILTER_XTABLES
	help
	  Multiport matching allows you to match TCP or UDP packets based on
	  a series of source or destination ports: normally a rule can only
	  match a single range of ports.

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

config NETFILTER_XT_MATCH_PHYSDEV
	tristate '"physdev" match support'
	depends on NETFILTER_XTABLES && BRIDGE && BRIDGE_NETFILTER
	help
	  Physdev packet matching matches against the physical bridge ports
	  the IP packet arrived on or will leave by.

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

config NETFILTER_XT_MATCH_PKTTYPE
	tristate '"pkttype" packet type match support'
	depends on NETFILTER_XTABLES
	help
	  Packet type matching allows you to match a packet by
	  its "class", eg. BROADCAST, MULTICAST, ...

	  Typical usage:
	  iptables -A INPUT -m pkttype --pkt-type broadcast -j LOG

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

config NETFILTER_XT_MATCH_QUOTA
	tristate '"quota" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `quota' match, which allows to match on a
	  byte counter.

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

config NETFILTER_XT_MATCH_REALM
	tristate  '"realm" match support'
	depends on NETFILTER_XTABLES
	select NET_CLS_ROUTE
	help
	  This option adds a `realm' match, which allows you to use the realm
	  key from the routing subsystem inside iptables.
	
	  This match pretty much resembles the CONFIG_NET_CLS_ROUTE4 option 
	  in tc world.
	
	  If you want to compile it as a module, say M here and read
	  <file:Documentation/kbuild/modules.txt>.  If unsure, say `N'.

config NETFILTER_XT_MATCH_SCTP
	tristate  '"sctp" protocol match support (EXPERIMENTAL)'
	depends on NETFILTER_XTABLES && EXPERIMENTAL
	help
	  With this option enabled, you will be able to use the 
	  `sctp' match in order to match on SCTP source/destination ports
	  and SCTP chunk types.

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

config NETFILTER_XT_MATCH_STATE
	tristate '"state" match support'
	depends on NETFILTER_XTABLES
	depends on NF_CONNTRACK
	help
	  Connection state matching allows you to match packets based on their
	  relationship to a tracked connection (ie. previous packets).  This
	  is a powerful tool for packet classification.

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

config NETFILTER_XT_MATCH_STATISTIC
	tristate '"statistic" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `statistic' match, which allows you to match
	  on packets periodically or randomly with a given percentage.

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

config NETFILTER_XT_MATCH_STRING
	tristate  '"string" match support'
	depends on NETFILTER_XTABLES
	select TEXTSEARCH
	select TEXTSEARCH_KMP
	select TEXTSEARCH_BM
	select TEXTSEARCH_FSM
	help
	  This option adds a `string' match, which allows you to look for
	  pattern matchings in packets.

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

config NETFILTER_XT_MATCH_TCPMSS
	tristate '"tcpmss" match support'
	depends on NETFILTER_XTABLES
	help
	  This option adds a `tcpmss' match, which allows you to examine the
	  MSS value of TCP SYN packets, which control the maximum packet size
	  for that connection.

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

config NETFILTER_XT_MATCH_TIME
	tristate '"time" match support'
	depends on NETFILTER_XTABLES
	---help---
	  This option adds a "time" match, which allows you to match based on
	  the packet arrival time (at the machine which netfilter is running)
	  on) or departure time/date (for locally generated packets).

	  If you say Y here, try `iptables -m time --help` for
	  more information.

	  If you want to compile it as a module, say M here.
	  If unsure, say N.

config NETFILTER_XT_MATCH_U32
	tristate '"u32" match support'
	depends on NETFILTER_XTABLES
	---help---
	  u32 allows you to extract quantities of up to 4 bytes from a packet,
	  AND them with specified masks, shift them by specified amounts and
	  test whether the results are in any of a set of specified ranges.
	  The specification of what to extract is general enough to skip over
	  headers with lengths stored in the packet, as in IP or TCP header
	  lengths.

	  Details and examples are in the kernel module source.

config NETFILTER_XT_MATCH_HASHLIMIT
	tristate '"hashlimit" match support'
	depends on NETFILTER_XTABLES && (IP6_NF_IPTABLES || IP6_NF_IPTABLES=n)
	help
	  This option adds a `hashlimit' match.

	  As opposed to `limit', this match dynamically creates a hash table
	  of limit buckets, based on your selection of source/destination
	  addresses and/or ports.

	  It enables you to express policies like `10kpps for any given
	  destination address' or `500pps from any given source address'
	  with a single rule.

endmenu