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shorewall6-zones(5)

NAME

   zones - Shorewall6 zone declaration file

SYNOPSIS

   /etc/shorewall6/zones

DESCRIPTION

   The /etc/shorewall6/zones file declares your network zones. You specify
   the hosts in each zone through entries in /etc/shorewall6/interfaces or
   /etc/shorewall6/hosts.

   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).

   ZONE - zone[:parent-zone[,parent-zone]...]
       Name of the zone. The names "all", "none", "SOURCE" and "DEST" are
       reserved and may not be used as zone names. The maximum length of a
       zone name is determined by the setting of the LOGFORMAT option in
       shorewall6.conf[1](5). With the default LOGFORMAT, zone names can
       be at most 5 characters long.  The maximum length of an iptables
       log prefix is 29 bytes. As explained in shorewall6.conf[1] (5), the
       default LOGPREFIX formatting string is "Shorewall:%s:%s:" where the
       first %s is replaced by the chain name and the second is replaced
       by the disposition.

       *   The default formatting string has 12 fixed characters
           ("Shorewall" and three colons).

       *   The longest of the standard dispositions are ACCEPT and REJECT
           which have 6 characters each.

       *   The canonical name for the chain containing the rules for
           traffic going from zone 1 to zone 2 is "<zone 1>2<zone 2>".

       *   So if M is the maximum zone name length, such chains can have
           length 2*M + 1.
               12 + 6 + 2*M + 1 = 29 which reduces to
               2*M = 29 - 12 - 6 - 1 = 10 or
               M = 5
       The order in which Shorewall6 matches addresses from packets to
       zones is determined by the order of zone declarations. Where a zone
       is nested in one or more other zones, you may either ensure that
       the nested zone precedes its parents in this file, or you may
       follow the (sub)zone name by ":" and a comma-separated list of the
       parent zones. The parent zones must have been declared in earlier
       records in this file. See shorewall6-nesting[2](5) for additional
       information.

       Example:

           #ZONE     TYPE     OPTIONS         IN OPTIONS        OUT OPTIONS
           a         ipv6
           b         ipv6
           c:a,b     ipv6

       Currently, Shorewall6 uses this information to reorder the zone
       list so that parent zones appear after their subzones in the list.
       The IMPLICIT_CONTINUE option in shorewall6.conf[1](5) can also
       create implicit CONTINUE policies to/from the subzone.

       Where an ipsec zone is explicitly included as a child of an ipv6
       zone, the ruleset allows CONTINUE policies (explicit or implicit)
       to work as expected.

       In the future, Shorewall6 may make additional use of nesting
       information.

   TYPE

       ipv6
           This is the standard Shorewall6 zone type and is the default if
           you leave this column empty or if you enter "-" in the column.
           Communication with some zone hosts may be encrypted. Encrypted
           hosts are designated using the 'ipsec' option in
           shorewall6-hosts[3](5).

       ipsec (or ipsec6)
           Communication with all zone hosts is encrypted. Your kernel and
           ip6tables must include policy match support.

       firewall
           Designates the firewall itself. You must have exactly one
           'firewall' zone. No options are permitted with a 'firewall'
           zone. The name that you enter in the ZONE column will be stored
           in the shell variable $FW which you may use in other
           configuration files to designate the firewall zone.

       bport (or bport6)
           The zone is associated with one or more ports on a single
           bridge.

       vserver
           Added in Shorewall 4.4.11 Beta 2 - A zone composed of
           Linux-vserver guests. The zone contents must be defined in
           shorewall6-hosts[3] (5).

           Vserver zones are implicitly handled as subzones of the
           firewall zone.

       loopback
           Added in Shorewall 4.5.17.

           Normally, Shorewall treats the loopback interface (lo) in the
           following way:

           *   By default, all traffic through the interface is ACCEPTed.

           *   If a $FW -> $FW policy is defined or $FW -> $FW rules are
               defined, they are placed in a chain named ${FW}2${F2} or
               ${FW}-${FW} (e.g., 'fw2fw' or 'fw-fw' ) depending on the
               ZONE2ZONE setting in shorewall6.conf[1](5).

           *   $FW -> $FW traffic is only filtered in the OUTPUT chain.

           By defining a loopback zone and associating it with the
           loopback interface in shorewall-interfaces(5), you can effect a
           slightly different model. Suppose that the loopback zone name
           is 'local'; then:

           *   Both $FW -> local and local -> $FW chains are created.

           *   The $FW -> local and local -> $FW policies may be
               different.

           *   Both $FW -> local and local -> $FW rules may be specified.

           Rules to/from the loopback zone and any zone other than the
           firewall zone are ignored with a warning.

           loopback zones may be nested within other loopback zones.

       local
           Added in Shorewall 4.5.17.  local is the same as ipv6 with the
           exception that the zone is only accessible from the firewall
           and vserver zones.

   OPTIONS, IN OPTIONS and OUT OPTIONS (options, in_options, out_options)
   - [option[,option]...]
       A comma-separated list of options. With the exception of the mss
       and blacklist options, these only apply to TYPE ipsec zones.

       blacklist
           Added in Shorewall 4.4.13. May not be specified for firewall or
           vserver zones.

           When specified in the IN_OPTIONS column, causes all traffic
           from this zone to be passed against the src entries in
           shorewall6-blacklist[4](5).

           When specified in the OUT_OPTIONS column, causes all traffic to
           this zone to be passed against the dst entries in
           shorewall6-blacklist[4](5).

           Specifying this option in the OPTIONS column is equivalent to
           entering it in both of the IN_OPTIONS and OUT_OPTIONS column.

       dynamic_shared
           Added in Shorewall 4.5.9. May only be specified in the OPTIONS
           column and indicates that only a single ipset should be created
           for this zone if it has multiple dynamic entries in
           shorewall6-hosts[3](5). Without this option, a separate ipset
           is created for each interface.

       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. If you supply this option,
           you should also set FASTACCEPT=No in shorewall6.conf[1](5) to
           insure that both the SYN and SYN,ACK packets have their MSS
           field adjusted.

       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

       The options in the OPTIONS column are applied to both incoming and
       outgoing traffic. The IN OPTIONS are applied to incoming traffic
       (in addition to OPTIONS) and the OUT OPTIONS are applied to
       outgoing traffic.

       If you wish to leave a column empty but need to make an entry in a
       following column, use "-".

FILES

   /etc/shorewall6/zones

SEE ALSO

   http://www.shorewall.net/Multiple_Zones.html[5].

   http://www.shorewall.net/configuration_file_basics.htm#Pairs[6]

   shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
   shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
   shorewall6-maclist(5), shorewall6-nesting(8),
   shorewall6-netmap(5),shorewall6-params(5), shorewall6-policy(5),
   shorewall6-providers(5), shorewall6-rtrules(5),
   shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5),
   shorewall6-secmarks(5), shorewall6-tcclasses(5),
   shorewall6-tcdevices(5), shorewall6-mangle(5), shorewall6-tos(5),
   shorewall6-tunnels(5)

NOTES

    1. shorewall6.conf
       http://www.shorewall.net/manpages6/shorewall6.conf.html

    2. shorewall6-nesting
       http://www.shorewall.net/manpages6/shorewall6-nesting.html

    3. shorewall6-hosts
       http://www.shorewall.net/manpages6/shorewall6-hosts.html

    4. shorewall6-blacklist
       http://www.shorewall.net/manpages6/shorewall6-blacklist.html

    5. http://www.shorewall.net/Multiple_Zones.html
       http://www.shorewall.net/Multiple_Zones.html

    6. http://www.shorewall.net/configuration_file_basics.htm#Pairs
       http://www.shorewall.net/configuration_file_basics.htm#Pairs



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