Ubuntu Manpage: accounting - Shorewall Accounting file

NAME

       accounting - Shorewall Accounting file

SYNOPSIS

       /etc/shorewall[6]/accounting

DESCRIPTION

Accounting rules exist simply to count packets and bytes in categories that you define in this file. You
may display these rules and their packet and byte counters using the shorewall show accounting command.

Beginning with Shorewall 4.4.18, the accounting structure can be created with three root chains:

• accountin: Rules that are valid in the INPUT chain (may not specify an output interface).

• accountout: Rules that are valid in the OUTPUT chain (may not specify an input interface or a MAC
address).

• accounting: Other rules.

The new structure is enabled by sectioning the accounting file in a manner similar to the rules file[1].
The sections are INPUT, OUTPUT and FORWARD and must appear in that order (although any of them may be
omitted). The first non-commentary record in the accounting file must be a section header when sectioning
is used.

Warning
If sections are not used, the Shorewall rules compiler cannot detect certain violations of netfilter
restrictions. These violations can result in run-time errors such as the following:

iptables-restore v1.4.13: Can't use -o with INPUT

Beginning with Shorewall 4.4.20, the ACCOUNTING_TABLE setting was added to shorewall.conf and
shorewall6.conf. That setting determines the Netfilter table (filter or mangle) where the accounting
rules are added. When ACCOUNTING_TABLE=mangle is specified, the available sections are PREROUTING, INPUT,
OUTPUT, FORWARD and POSTROUTING.

Section headers have the form:

?SECTION section-name

When sections are enabled:

• A jump to a user-defined accounting chain must appear before entries that add rules to that chain.
This eliminates loops and unreferenced chains.

• An output interface may not be specified in the PREROUTING and INPUT sections.

• In the OUTPUT and POSTROUTING sections:

• An input interface may not be specified

• Jumps to a chain defined in the INPUT or PREROUTING sections that specifies an input interface
are prohibited

• MAC addresses may not be used

• Jump to a chain defined in the INPUT or PREROUTING section that specifies a MAC address are
prohibited.

• The default value of the CHAIN column is:

• accountin in the INPUT section

• accountout in the OUTPUT section

• accountfwd in the FORWARD section

• accountpre in the PREROUTING section

• accountpost in the POSTROUTING section

• Traffic addressed to the firewall goes through the rules defined in the INPUT section.

• Traffic originating on the firewall goes through the rules defined in the OUTPUT section.

• Traffic being forwarded through the firewall goes through the rules from the FORWARD sections.

The columns in the file are as follows (where the column name is followed by a different name in
parentheses, the different name is used in the alternate specification syntax):

ACTION - {COUNT|DONE|chain[:{COUNT|JUMP}]|ACCOUNT(table,network)|[?]COMMENT comment}
What to do when a matching packet is found.

COUNT
Simply count the match and continue with the next rule

DONE
Count the match and don't attempt to match any other accounting rules in the chain specified in
the CHAIN column.

chain[:COUNT]
Where chain is the name of a chain; shorewall will create the chain automatically if it doesn't
already exist. If a second chain is mentioned in the CHAIN column, then a jump from this second
chain to chain is created. If no chain is named in the CHAIN column, then a jump from the default
chain to chain is created. If :COUNT is included, a counting rule matching this entry will be
added to chain. The chain may not exceed 29 characters in length and may be composed of letters,
digits, dash ('-') and underscore ('_').

chain:JUMP
Like the previous option without the :COUNT part.

ACCOUNT(table,network)
This action implements per-IP accounting and was added in Shorewall 4.4.17. Requires the ACCOUNT
Target capability in your iptables and kernel (see the output of shorewall show capabilities).

table
is the name of an accounting table (you choose the name). All rules specifying the same name
will have their per-IP counters accumulated in the same table.

network
is an IPv4 network in CIDR notation (e.g., 192.168.1.0/24). The network can be as large as a
/8 (class A).

One nice feature of per-IP accounting is that the counters survive shorewall restart. This has a
downside, however. If you change the network associated with an accounting table, then you must
shorewall stop; shorewall start to have a successful restart (counters will be cleared).

The counters in a table are printed using the iptaccount utility. For a command synopsis, type:

iptaccount --help

As of February 2011, the ACCOUNT Target capability and the iptaccount utility are only available
when xtables-addons[2] is installed. See http://www.shorewall.net/Accounting.html#perIP[3] for
additional information.

INLINE
Added in Shorewall 4.5.16. Allows free form iptables matches to be specified following a ';'. In
the generated iptables rule(s), the free form matches will follow any matches that are generated
by the column contents.

NFACCT({object[!]}[,...])
Added in Shorewall 4.5.7. Provides a form of accounting that survives shorewall stop/shorewall
start and shorewall restart. Requires the NFaccnt Match capability in your kernel and iptables.
object names an nfacct object (see man nfaccnt(8)). Multiple rules can specify the same object;
all packets that match any of the rules increment the packet and bytes count of the object.

Prior to Shorewall 4.5.16, only one object could be specified. Beginning with Shorewall 4.5.16,
an arbitrary number of objects may be given.

With Shorewall 4.5.16 or later, an nfacct object in the list may optionally be followed by ! to
indicate that the nfacct object will be incremented unconditionally for each packet. When ! is
omitted, the object will be incremented only if all of the matches in the rule succeed.

NFLOG[(nflog-parameters)] - Added in Shorewall-4.4.20.
Causes each matching packet to be sent via the currently loaded logging back-end (usually
nfnetlink_log) where it is available to accounting daemons through a netlink socket.

?COMMENT
The remainder of the line is treated as a comment which is attached to subsequent rules until
another COMMENT line is found or until the end of the file is reached. To stop adding comments to
rules, use a line with only the word ?COMMENT.

CHAIN - {-|chain}
The name of a chain. If specified as - the accounting chain is assumed when the file is un-sectioned.
When the file is sectioned, the default is one of accountin, accountout, etc. depending on the
section. This is the chain where the accounting rule is added. The chain will be created if it
doesn't already exist. The chain may not exceed 29 characters in length.

SOURCE - {-|any|all|interface|interface:address|address}
Packet Source.

The name of an interface, an address (host or net) or an interface name followed by ":" and a host or
net address. An ipset name is also accepted as an address.

DEST - {-|any|all|interface|interface:address|address}
This column was formerly named DESTINATION.

Packet Destination.

Format same as SOURCE column.

PROTO - {-|{any|all|protocol-name|protocol-number|ipp2p[:{udp|all}]}[,...]}
This column was formerly named PROTOCOL

A protocol-name (from protocols(5)), a protocol-number, ipp2p, ipp2p:udp or ipp2p:all

Beginning with Shorewall 4.5.12, this column can accept a comma-separated list of protocols.

DPORT - {-|any|all|ipp2p-option|port-name-or-number[,port-name-or-number]...}
Destination Port number. Service name from services(5) or port number. May only be specified if the
protocol is TCP (6), UDP (17), DCCP (33), SCTP (132) or UDPLITE (136).

You may place a comma-separated list of port names or numbers in this column if your kernel and
iptables include multi-port match support.

If the PROTOCOL is ipp2p then this column must contain an ipp2p-option ("iptables -m ipp2p --help")
without the leading "--". If no option is given in this column, ipp2p is assumed.

This column was formerly named DEST PORT(S).

SPORT - {-|any|all|port-name-or-number[,port-name-or-number]...}
Service name from services(5) or port number. May only be specified if the protocol is TCP (6), UDP
(17), DCCP (33), SCTP (132) or UDPLITE (136).

You may place a comma-separated list of port numbers in this column if your kernel and iptables
include multi-port match support.

Beginning with Shorewall 4.5.15, you may place '=' in this column, provided that the DEST PORT(S)
column is non-empty. This causes the rule to match when either the source port or the destination
port in a packet matches one of the ports specified in DPORT. Use of '=' requires multi-port match in
your iptables and kernel.

This column was formerly labelled SOURCE PORT(S).

USER - [!][user-name-or-number][:group-name-or-number][+program-name]
This column was formerly named USER/GROUP and may only be non-empty if the CHAIN is OUTPUT.

When this column is non-empty, the rule applies only if the program generating the output is running
under the effective user and/or group specified (or is NOT running under that id if "!" is given).

Examples:

joe
program must be run by joe

:kids
program must be run by a member of the 'kids' group

!:kids
program must not be run by a member of the 'kids' group

+upnpd
#program named upnpd

Important
The ability to specify a program name was removed from Netfilter in kernel version 2.6.14.

MARK - [!]value[/mask][:C]
Defines a test on the existing packet or connection mark. The rule will match only if the test
returns true.

If you don't want to define a test but need to specify anything in the following columns, place a "-"
in this field.

!
Inverts the test (not equal)

value
Value of the packet or connection mark.

mask
A mask to be applied to the mark before testing.

:C
Designates a connection mark. If omitted, the packet mark's value is tested.

IPSEC - option-list (Optional - Added in Shorewall 4.4.13 but broken until 4.5.4.1 )
The option-list consists of a comma-separated list of options from the following list. Only packets
that will be encrypted or have been decrypted via an SA that matches these options will have their
source address changed.

reqid=number
where number is specified using setkey(8) using the 'unique:number option for the SPD level.

spi=<number>
where number is the SPI of the SA used to encrypt/decrypt packets.

proto=ah|esp|ipcomp
IPSEC Encapsulation Protocol

mss=number
sets the MSS field in TCP packets

mode=transport|tunnel
IPSEC mode

tunnel-src=address[/mask]
only available with mode=tunnel

tunnel-dst=address[/mask]
only available with mode=tunnel

strict
Means that packets must match all rules.

next
Separates rules; can only be used with strict

yes or ipsec
When used by itself, causes all traffic that will be encrypted/encapsulated or has been
decrypted/un-encapsulated to match the rule.

no or none
When used by itself, causes all traffic that will not be encrypted/encapsulated or has been
decrypted/un-encapsulated to match the rule.

in
May only be used in the FORWARD section and must be the first or the only item the list.
Indicates that matching packets have been decrypted in input.

out
May only be used in the FORWARD section and must be the first or the only item in the list.
Indicates that matching packets will be encrypted on output.

If this column is non-empty and sections are not used, then:

• A chain NAME appearing in the ACTION column must be a chain branched either directly or
indirectly from the accipsecin or accipsecout chain.

• The CHAIN column must contain either accipsecin or accipsecout or a chain branched either
directly or indirectly from those chains.

• These rules will NOT appear in the accounting chain.

In all of the above columns except ACTION and CHAIN, the values -, any and all may be used as
wildcard'gs. Omitted trailing columns are also treated as wildcard'g.

FILES

       /etc/shorewall/accounting

       /etc/shorewall6/accounting

NOTES

        1. rules file
           http://www.shorewall.org/manpages/shorewall-rules.html

        2. xtables-addons
           http://xtables-addons.sourceforge.net/

        3. http://www.shorewall.net/Accounting.html#perIP
           http://www.shorewall.org/Accounting.html#perIP

        4. shorewall-logging(5)
           http://www.shorewall.orgshorewall-logging.htm

        5. http://www.shorewall.net/configuration_file_basics.htm#Pairs
           http://www.shorewall.org/configuration_file_basics.htm#Pairs

NAME

SYNOPSIS

DESCRIPTION

FILES

SEE ALSO

NOTES