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ip6tables - Unix, Linux Command


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NAME

ip6tables - IPv6 packet filter administration

SYNOPSIS

ip6tables [-t table] -[AD] chain rule-specification [options]
ip6tables [-t table] -I chain [rulenum] rule-specification [options]
ip6tables [-t table] -R chain rulenum rule-specification [options]
ip6tables [-t table] -D chain rulenum [options]
ip6tables [-t table] -[LFZ] [chain] [options]
ip6tables [-t table] -N chain
ip6tables [-t table] -X [chain]
ip6tables [-t table] -P chain target [options]
ip6tables [-t table] -E old-chain-name new-chain-name

DESCRIPTION

Ip6tables is used to set up, maintain, and inspect the tables of IPv6 packet filter rules in the Linux kernel. Several different tables may be defined. Each table contains a number of built-in chains and may also contain user-defined chains.

Each chain is a list of rules which can match a set of packets. Each rule specifies what to do with a packet that matches. This is called a ‘target’, which may be a jump to a user-defined chain in the same table.

TARGETS

A firewall rule specifies criteria for a packet, and a target. If the packet does not match, the next rule in the chain is the examined; if it does match, then the next rule is specified by the value of the target, which can be the name of a user-defined chain or one of the special values ACCEPT, DROP, QUEUE, or RETURN.

ACCEPT means to let the packet through. DROP means to drop the packet on the floor. QUEUE means to pass the packet to userspace. (How the packet can be received by a userspace process differs by the particular queue handler. 2.4.x and 2.6.x kernels up to 2.6.13 include the ip_queue queue handler. Kernels 2.6.14 and later additionally include the nfnetlink_queue queue handler. Packets with a target of QUEUE will be sent to queue number ’0’ in this case. Please also see the NFQUEUE target as described later in this man page.) RETURN means stop traversing this chain and resume at the next rule in the previous (calling) chain. If the end of a built-in chain is reached or a rule in a built-in chain with target RETURN is matched, the target specified by the chain policy determines the fate of the packet.

TABLES

There are currently two independent tables (which tables are present at any time depends on the kernel configuration options and which modules are present), as nat table has not been implemented yet.
TagDescription
-t, --table table
  This option specifies the packet matching table which the command should operate on. If the kernel is configured with automatic module loading, an attempt will be made to load the appropriate module for that table if it is not already there.

The tables are as follows:

TagDescription
filter:
  This is the default table (if no -t option is passed). It contains the built-in chains INPUT (for packets coming into the box itself), FORWARD (for packets being routed through the box), and OUTPUT (for locally-generated packets).
mangle:
  This table is used for specialized packet alteration. Until kernel 2.4.17 it had two built-in chains: PREROUTING (for altering incoming packets before routing) and OUTPUT (for altering locally-generated packets before routing). Since kernel 2.4.18, three other built-in chains are also supported: INPUT (for packets coming into the box itself), FORWARD (for altering packets being routed through the box), and POSTROUTING (for altering packets as they are about to go out).
raw:
  This table is used mainly for configuring exemptions from connection tracking in combination with the NOTRACK target. It registers at the netfilter hooks with higher priority and is thus called before nf_conntrack, or any other IP6 tables. It provides the following built-in chains: PREROUTING (for packets arriving via any network interface) OUTPUT (for packets generated by local processes)

OPTIONS

The options that are recognized by ip6tables can be divided into several different groups.

COMMANDS

These options specify the specific action to perform. Only one of them can be specified on the command line unless otherwise specified below. For all the long versions of the command and option names, you need to use only enough letters to ensure that ip6tables can differentiate it from all other options.
TagDescription
-A, --append chain rule-specification
  Append one or more rules to the end of the selected chain. When the source and/or destination names resolve to more than one address, a rule will be added for each possible address combination.
-D, --delete chain rule-specification
-D, --delete chain rulenum
  Delete one or more rules from the selected chain. There are two versions of this command: the rule can be specified as a number in the chain (starting at 1 for the first rule) or a rule to match.
-I, --insert
  Insert one or more rules in the selected chain as the given rule number. So, if the rule number is 1, the rule or rules are inserted at the head of the chain. This is also the default if no rule number is specified.
-R, --replace chain rulenum rule-specification
  Replace a rule in the selected chain. If the source and/or destination names resolve to multiple addresses, the command will fail. Rules are numbered starting at 1.
-L, --list [chain]
  List all rules in the selected chain. If no chain is selected, all chains are listed. As every other iptables command, it applies to the specified table (filter is the default), so mangle rules get listed by
 ip6tables -t mangle -n -L
Please note that it is often used with the -n option, in order to avoid long reverse DNS lookups. It is legal to specify the -Z (zero) option as well, in which case the chain(s) will be atomically listed and zeroed. The exact output is affected by the other arguments given. The exact rules are suppressed until you use
 ip6tables -L -v
-F, --flush [chain]
  Flush the selected chain (all the chains in the table if none is given). This is equivalent to deleting all the rules one by one.
-Z, --zero [chain]
  Zero the packet and byte counters in all chains. It is legal to specify the -L, --list (list) option as well, to see the counters immediately before they are cleared. (See above.)
-N, --new-chain chain
  Create a new user-defined chain by the given name. There must be no target of that name already.
-X, --delete-chain [chain]
  Delete the optional user-defined chain specified. There must be no references to the chain. If there are, you must delete or replace the referring rules before the chain can be deleted. If no argument is given, it will attempt to delete every non-builtin chain in the table.
-P, --policy chain target
  Set the policy for the chain to the given target. See the section TARGETS for the legal targets. Only built-in (non-user-defined) chains can have policies, and neither built-in nor user-defined chains can be policy targets.
-E, --rename-chain old-chain new-chain
  Rename the user specified chain to the user supplied name. This is cosmetic, and has no effect on the structure of the table.
-h Help. Give a (currently very brief) description of the command syntax.

PARAMETERS

The following parameters make up a rule specification (as used in the add, delete, insert, replace and append commands).
TagDescription
-p, --protocol [!] protocol
  The protocol of the rule or of the packet to check. The specified protocol can be one of tcp, udp, icmpv6, esp, all, or it can be a numeric value, representing one of these protocols or a different one. A protocol name from /etc/protocols is also allowed. But IPv6 extension headers except esp are not allowed. esp, and ipv6-nonext can be used with Kernel version 2.6.11 or later. A "!" argument before the protocol inverts the test. The number zero is equivalent to all. Protocol all will match with all protocols and is taken as default when this option is omitted.
-s, --source [!] address[/mask]
  Source specification. Address can be either a hostname (please note that specifying any name to be resolved with a remote query such as DNS is a really bad idea), a network IPv6 address (with /mask), or a plain IPv6 address. (the network name isn’t supported now). The mask can be either a network mask or a plain number, specifying the number of 1’s at the left side of the network mask. Thus, a mask of 64 is equivalent to ffff:ffff:ffff:ffff:0000:0000:0000:0000. A "!" argument before the address specification inverts the sense of the address. The flag --src is an alias for this option.
-d, --destination [!] address[/mask]
  Destination specification. See the description of the -s (source) flag for a detailed description of the syntax. The flag --dst is an alias for this option.
-j, --jump target
  This specifies the target of the rule; i.e., what to do if the packet matches it. The target can be a user-defined chain (other than the one this rule is in), one of the special builtin targets which decide the fate of the packet immediately, or an extension (see EXTENSIONS below). If this option is omitted in a rule, then matching the rule will have no effect on the packet’s fate, but the counters on the rule will be incremented.
-i, --in-interface [!] name
  Name of an interface via which a packet is going to be received (only for packets entering the INPUT, FORWARD and PREROUTING chains). When the "!" argument is used before the interface name, the sense is inverted. If the interface name ends in a "+", then any interface which begins with this name will match. If this option is omitted, any interface name will match.
-o, --out-interface [!] name
  Name of an interface via which a packet is going to be sent (for packets entering the FORWARD and OUTPUT chains). When the "!" argument is used before the interface name, the sense is inverted. If the interface name ends in a "+", then any interface which begins with this name will match. If this option is omitted, any interface name will match.
-c, --set-counters PKTS BYTES
  This enables the administrator to initialize the packet and byte counters of a rule (during INSERT, APPEND, REPLACE operations).

OTHER OPTIONS

The following additional options can be specified:
TagDescription
-v, --verbose
  Verbose output. This option makes the list command show the interface name, the rule options (if any), and the TOS masks. The packet and byte counters are also listed, with the suffix ’K’, ’M’ or ’G’ for 1000, 1,000,000 and 1,000,000,000 multipliers respectively (but see the -x flag to change this). For appending, insertion, deletion and replacement, this causes detailed information on the rule or rules to be printed.
-n, --numeric
  Numeric output. IP addresses and port numbers will be printed in numeric format. By default, the program will try to display them as host names, network names, or services (whenever applicable).
-x, --exact
  Expand numbers. Display the exact value of the packet and byte counters, instead of only the rounded number in K’s (multiples of 1000) M’s (multiples of 1000K) or G’s (multiples of 1000M). This option is only relevant for the -L command.
--line-numbers
  When listing rules, add line numbers to the beginning of each rule, corresponding to that rule’s position in the chain.
--modprobe=command
  When adding or inserting rules into a chain, use command to load any necessary modules (targets, match extensions, etc).

MATCH EXTENSIONS

ip6tables can use extended packet matching modules. These are loaded in two ways: implicitly, when -p or --protocol is specified, or with the -m or --match options, followed by the matching module name; after these, various extra command line options become available, depending on the specific module. You can specify multiple extended match modules in one line, and you can use the -h or --help options after the module has been specified to receive help specific to that module.

The following are included in the base package, and most of these can be preceded by a ! to invert the sense of the match.

ah

This module matches the parameters in Authentication header of IPsec packets.
TagDescription
--ahspi [!] spi[:spi]
  Matches SPI.
--ahlen [!] length
  Total length of this header in octets.
--ahres
  Matches if the reserved field is filled with zero.

condition

This matches if a specific /proc filename is ’0’ or ’1’.
TagDescription
--condition [!] filename
  Match on boolean value stored in /proc/net/ip6t_condition/filename file

dst

This module matches the parameters in Destination Options header
TagDescription
--dst-len [!] length
  Total length of this header in octets.
--dst-opts type[:length][,type[:length]...]
  numeric type of option and the length of the option data in octets.

esp

This module matches the SPIs in ESP header of IPsec packets.
TagDescription
--espspi [!] spi[:spi]
 

eui64

This module matches the EUI-64 part of a stateless autoconfigured IPv6 address. It compares the EUI-64 derived from the source MAC address in Ehternet frame with the lower 64 bits of the IPv6 source address. But "Universal/Local" bit is not compared. This module doesn’t match other link layer frame, and is only valid in the PREROUTING, INPUT and FORWARD chains.

frag

This module matches the parameters in Fragment header.
TagDescription
--fragid [!] id[:id]
  Matches the given Identification or range of it.
--fraglen [!] length
  This option cannot be used with kernel version 2.6.10 or later. The length of Fragment header is static and this option doesn’t make sense.
--fragres
  Matches if the reserved fields are filled with zero.
--fragfirst
  Matches on the first fragment.
[--fragmore]
  Matches if there are more fragments.
[--fraglast]
  Matches if this is the last fragement.

fuzzy

This module matches a rate limit based on a fuzzy logic controller [FLC]
TagDescription
--lower-limit number
  Specifies the lower limit (in packets per second).
--upper-limit number
  Specifies the upper limit (in packets per second).

hbh

This module matches the parameters in Hop-by-Hop Options header
TagDescription
--hbh-len [!] length
  Total length of this header in octets.
--hbh-opts type[:length][,type[:length]...]
  numeric type of option and the length of the option data in octets.

hl

This module matches the Hop Limit field in the IPv6 header.
TagDescription
--hl-eq [!] value
  Matches if Hop Limit equals value.
--hl-lt value
  Matches if Hop Limit is less than value.
--hl-gt value
  Matches if Hop Limit is greater than value.

icmpv6

This extension is loaded if ‘--protocol ipv6-icmp’ or ‘--protocol icmpv6’ is specified. It provides the following option:
TagDescription
--icmpv6-type [!] type[/code]|typename
  This allows specification of the ICMPv6 type, which can be a numeric ICMPv6 type, type and code, or one of the ICMPv6 type names shown by the command
 ip6tables -p ipv6-icmp -h

ipv6header

This module matches IPv6 extension headers and/or upper layer header.
TagDescription
--header [!] header[,header...]
  Matches the packet which EXACTLY includes all specified headers. The headers encapsulated with ESP header are out of scope. header can be hop|hop-by-hop (Hop-by-Hop Options header), dst (Destination Options header), route (Routing header), frag (Fragment header), auth (Authentication header), esp (Encapsulating Security Payload header), none (No Next header) which matches 59 in the ’Next Header field’ of IPv6 header or any IPv6 extension headers, or proto which matches any upper layer protocol header. A protocol name from /etc/protocols and numeric value also allowed. The number 255 is equivalent to proto.
[--soft]
  Matches if the packet includes all specified headers with --header, AT LEAST.

length

This module matches the length of the IPv6 payload in octets, or range of it. IPv6 header itself isn’t counted.
TagDescription
--length [!] length[:length]
 

limit

This module matches at a limited rate using a token bucket filter. A rule using this extension will match until this limit is reached (unless the ‘!’ flag is used). It can be used in combination with the LOG target to give limited logging, for example.
TagDescription
--limit rate
  Maximum average matching rate: specified as a number, with an optional ‘/second’, ‘/minute’, ‘/hour’, or ‘/day’ suffix; the default is 3/hour.
--limit-burst number
  Maximum initial number of packets to match: this number gets recharged by one every time the limit specified above is not reached, up to this number; the default is 5.

mac

TagDescription
--mac-source [!] address
  Match source MAC address. It must be of the form XX:XX:XX:XX:XX:XX. Note that this only makes sense for packets coming from an Ethernet device and entering the PREROUTING, FORWARD or INPUT chains.

mark

This module matches the netfilter mark field associated with a packet (which can be set using the MARK target below).
TagDescription
--mark value[/mask]
  Matches packets with the given unsigned mark value (if a mask is specified, this is logically ANDed with the mask before the comparison).

multiport

This module matches a set of source or destination ports. Up to 15 ports can be specified. A port range (port:port) counts as two ports, but range isn’t supported now. It can only be used in conjunction with -p tcp or -p udp.
TagDescription
--source-ports [!] port[,port[,port:port...]]
  Match if the source port is one of the given ports. The flag --sports is a convenient alias for this option.
--destination-ports [!] port[,port[,port:port...]]
  Match if the destination port is one of the given ports. The flag --dports is a convenient alias for this option.
--ports [!] port[,port[,port:port...]]
  Match if the both the source and destination ports are equal to each other and to one of the given ports.

nth

This module matches every ‘n’th packet
TagDescription
--every value
  Match every ‘value’ packet
[--counter num]
  Use internal counter number ‘num’. Default is ‘0’.
[--start num]
  Initialize the counter at the number ‘num’ insetad of ‘0’. Most between ‘0’ and ‘value’-1.
[--packet num]
  Match on ‘num’ packet. Most be between ‘0’ and ‘value’-1.

owner

This module attempts to match various characteristics of the packet creator, for locally-generated packets. It is only valid in the OUTPUT chain, and even this some packets (such as ICMPv6 ping responses) may have no owner, and hence never match. This is regarded as experimental.
TagDescription
--uid-owner userid
  Matches if the packet was created by a process with the given effective user id.
--gid-owner groupid
  Matches if the packet was created by a process with the given effective group id.
--pid-owner processid
  Matches if the packet was created by a process with the given process id.
--sid-owner sessionid
  Matches if the packet was created by a process in the given session group.
NOTE: pid, sid and command matching are broken on SMP
 

physdev

This module matches on the bridge port input and output devices enslaved to a bridge device. This module is a part of the infrastructure that enables a transparent bridging IP firewall and is only useful for kernel versions above version 2.5.44.
TagDescription
--physdev-in [!] name
  Name of a bridge port via which a packet is received (only for packets entering the INPUT, FORWARD and PREROUTING chains). If the interface name ends in a "+", then any interface which begins with this name will match. If the packet didn’t arrive through a bridge device, this packet won’t match this option, unless ’!’ is used.
--physdev-out [!] name
  Name of a bridge port via which a packet is going to be sent (for packets entering the FORWARD, OUTPUT and POSTROUTING chains). If the interface name ends in a "+", then any interface which begins with this name will match. Note that in the nat and mangle OUTPUT chains one cannot match on the bridge output port, however one can in the filter OUTPUT chain. If the packet won’t leave by a bridge device or it is yet unknown what the output device will be, then the packet won’t match this option, unless
[!] --physdev-is-in
  Matches if the packet has entered through a bridge interface.
[!] --physdev-is-out
  Matches if the packet will leave through a bridge interface.
[!] --physdev-is-bridged
  Matches if the packet is being bridged and therefore is not being routed. This is only useful in the FORWARD and POSTROUTING chains.

policy

This modules matches the policy used by IPsec for handling a packet.
TagDescription
--dir in|out
  Used to select whether to match the policy used for decapsulation or the policy that will be used for encapsulation. in is valid in the PREROUTING, INPUT and FORWARD chains, out is valid in the POSTROUTING, OUTPUT and FORWARD chains.
--pol none|ipsec
  Matches if the packet is subject to IPsec processing.
--strict
  Selects whether to match the exact policy or match if any rule of the policy matches the given policy.
--reqid id
  Matches the reqid of the policy rule. The reqid can be specified with setkey(8) using unique:id as level.
--spi spi
  Matches the SPI of the SA.
--proto ah|esp|ipcomp
  Matches the encapsulation protocol.
--mode tunnel|transport
  Matches the encapsulation mode.
--tunnel-src addr[/mask]
  Matches the source end-point address of a tunnel mode SA. Only valid with --mode tunnel.
--tunnel-dst addr[/mask]
  Matches the destination end-point address of a tunnel mode SA. Only valid with --mode tunnel.
--next
  Start the next element in the policy specification. Can only be used with --strict

random

This module randomly matches a certain percentage of all packets.
TagDescription
--average percent
  Matches the given percentage. If omitted, a probability of 50% is set.

rt

Match on IPv6 routing header
TagDescription
--rt-type [!] type
  Match the type (numeric).
--rt-segsleft [!] num[:num]
  Match the ‘segments left’ field (range).
--rt-len [!] length
  Match the length of this header.
--rt-0-res
  Match the reserved field, too (type=0)
--rt-0-addrs ADDR[,ADDR...]
  Match type=0 addresses (list).
--rt-0-not-strict
  List of type=0 addresses is not a strict list.

tcp

These extensions are loaded if ‘--protocol tcp’ is specified. It provides the following options:
TagDescription
--source-port [!] port[:port]
  Source port or port range specification. This can either be a service name or a port number. An inclusive range can also be specified, using the format port:port. If the first port is omitted, "0" is assumed; if the last is omitted, "65535" is assumed. If the second port greater then the first they will be swapped. The flag --sport is a convenient alias for this option.
--destination-port [!] port[:port]
  Destination port or port range specification. The flag --dport is a convenient alias for this option.
--tcp-flags [!] mask comp
  Match when the TCP flags are as specified. The first argument is the flags which we should examine, written as a comma-separated list, and the second argument is a comma-separated list of flags which must be set. Flags are: SYN ACK FIN RST URG PSH ALL NONE. Hence the command
 ip6tables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST SYN
will only match packets with the SYN flag set, and the ACK, FIN and RST flags unset.
[!] --syn
  Only match TCP packets with the SYN bit set and the ACK and RST bits cleared. Such packets are used to request TCP connection initiation; for example, blocking such packets coming in an interface will prevent incoming TCP connections, but outgoing TCP connections will be unaffected. It is equivalent to --tcp-flags SYN,RST,ACK SYN. If the "!" flag precedes the "--syn", the sense of the option is inverted.
--tcp-option [!] number
  Match if TCP option set.

udp

These extensions are loaded if ‘--protocol udp’ is specified. It provides the following options:
TagDescription
--source-port [!] port[:port]
  Source port or port range specification. See the description of the --source-port option of the TCP extension for details.
--destination-port [!] port[:port]
  Destination port or port range specification. See the description of the --destination-port option of the TCP extension for details.

TARGET EXTENSIONS

ip6tables can use extended target modules: the following are included in the standard distribution.

DSCP

This target allows to alter the value of the DSCP bits within the TOS header of the IPv4 packet. As this manipulates a packet, it can only be used in the mangle table.
TagDescription
--set-dscp value
  Set the DSCP field to a numerical value (can be decimal or hex)
--set-dscp-class class
  Set the DSCP field to a DiffServ class.

HL

This is used to modify the Hop Limit field in IPv6 header. The Hop Limit field is similar to what is known as TTL value in IPv4. Setting or incrementing the Hop Limit field can potentially be very dangerous, so it should be avoided at any cost. This target is only valid in mangle table.
TagDescription
Don’t ever set or increment the value on packets that leave your local network!
--hl-set value
  Set the Hop Limit to ‘value’.
--hl-dec value
  Decrement the Hop Limit ‘value’ times.
--hl-inc value
  Increment the Hop Limit ‘value’ times.

LOG

Turn on kernel logging of matching packets. When this option is set for a rule, the Linux kernel will print some information on all matching packets (like most IPv6 IPv6-header fields) via the kernel log (where it can be read with dmesg or syslogd(8)). This is a "non-terminating target", i.e. rule traversal continues at the next rule. So if you want to LOG the packets you refuse, use two separate rules with the same matching criteria, first using target LOG then DROP (or REJECT).
TagDescription
--log-level level
  Level of logging (numeric or see syslog.conf(5)).
--log-prefix prefix
  Prefix log messages with the specified prefix; up to 29 letters long, and useful for distinguishing messages in the logs.
--log-tcp-sequence
  Log TCP sequence numbers. This is a security risk if the log is readable by users.
--log-tcp-options
  Log options from the TCP packet header.
--log-ip-options
  Log options from the IPv6 packet header.
--log-uid
  Log the userid of the process which generated the packet.

MARK

This is used to set the netfilter mark value associated with the packet. It is only valid in the mangle table.
TagDescription
--set-mark mark
 

NFQUEUE

This target is an extension of the QUEUE target. As opposed to QUEUE, it allows you to put a packet into any specific queue, identified by its 16-bit queue number.
TagDescription
--queue-num value
  This specifies the QUEUE number to use. Valud queue numbers are 0 to 65535. The default value is 0.
It can only be used with Kernel versions 2.6.14 or later, since it requires
  the nfnetlink_queue kernel support.

REJECT

This is used to send back an error packet in response to the matched packet: otherwise it is equivalent to DROP so it is a terminating TARGET, ending rule traversal. This target is only valid in the INPUT, FORWARD and OUTPUT chains, and user-defined chains which are only called from those chains. The following option controls the nature of the error packet returned:
TagDescription
--reject-with type
  The type given can be
 icmp6-no-route 
 no-route 
 icmp6-adm-prohibited 
 adm-prohibited 
 icmp6-addr-unreachable 
 addr-unreach 
 icmp6-port-unreachable 
 port-unreach 
which return the appropriate ICMPv6 error message (port-unreach is the default). Finally, the option tcp-reset can be used on rules which only match the TCP protocol: this causes a TCP RST packet to be sent back. This is mainly useful for blocking ident (113/tcp) probes which frequently occur when sending mail to broken mail hosts (which won’t accept your mail otherwise). tcp-reset can only be used with kernel versions 2.6.14 or latter.

TRACE

This target has no options. It just turns on packet tracing for all packets that match this rule.

DIAGNOSTICS

Various error messages are printed to standard error. The exit code is 0 for correct functioning. Errors which appear to be caused by invalid or abused command line parameters cause an exit code of 2, and other errors cause an exit code of 1.

BUGS

Bugs? What’s this? ;-) Well... the counters are not reliable on sparc64.

COMPATIBILITY WITH IPCHAINS

This ip6tables is very similar to ipchains by Rusty Russell. The main difference is that the chains INPUT and OUTPUT are only traversed for packets coming into the local host and originating from the local host respectively. Hence every packet only passes through one of the three chains (except loopback traffic, which involves both INPUT and OUTPUT chains); previously a forwarded packet would pass through all three.

The other main difference is that -i refers to the input interface; -o refers to the output interface, and both are available for packets entering the FORWARD chain. There are several other changes in ip6tables.

SEE ALSO

The packet-filtering-HOWTO details iptables usage for packet filtering, the NAT-HOWTO details NAT, the netfilter-extensions-HOWTO details the extensions that are not in the standard distribution, and the netfilter-hacking-HOWTO details the netfilter internals.
See http://www.netfilter.org/.

AUTHORS

Rusty Russell wrote iptables, in early consultation with Michael Neuling.

Marc Boucher made Rusty abandon ipnatctl by lobbying for a generic packet selection framework in iptables, then wrote the mangle table, the owner match, the mark stuff, and ran around doing cool stuff everywhere.

James Morris wrote the TOS target, and tos match.

Jozsef Kadlecsik wrote the REJECT target.

Harald Welte wrote the ULOG and NFQUEUE target, the new libiptc, aswell as TTL match+target and libipulog.

The Netfilter Core Team is: Marc Boucher, Martin Josefsson, Jozsef Kadlecsik, James Morris, Harald Welte and Rusty Russell.

ip6tables man page created by Andras Kis-Szabo, based on iptables man page written by Herve Eychenne <rv@wallfire.org>.


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