shorewall-zones 5 zones Shorewall zone declaration file /etc/shorewall/zones The /etc/shorewall/zones file declares your network zones. You specify the hosts in each zone through entries in /etc/shorewall/interfaces or /etc/shorewall/hosts. The format of this file changed in Shorewall 3.0.0. You can continue to use your old records provided that you set IPSECFILE=ipsec in /etc/shorewall/shorewall.conf. This will signal Shorewall that the IPSEC-related zone options are still specified in /etc/shorewall/ipsec rather than in this file. To use records in the format described below, you must have IPSECFILE=zones specified in /etc/shorewall/shorewall.conf AND YOU MUST NOT SET THE 'FW' VARIABLE IN THAT FILE. The columns in the file are as follows. ZONE Short name of the zone. The names "all" and "none" 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 shorewall.conf. With the default LOGFORMAT, zone names can be at most 5 characters long. Where a zone is nested in one or more other zones, you may follow the (sub)zone name by ":" and a comma-separated list of the parent zones. The parent zones must have been defined in earlier records in this file. Example: #ZONE TYPE OPTIONS IN OPTIONS OUT OPTIONS a ipv4 b ipv4 c:a,b ipv4 Currently, Shorewall uses this information to reorder the zone list so that parent zones appear after their subzones in the list. The IMPLICIT_CONTINUE option in shorewall.conf can also create implicit CONTINUE policies to/from the subzone. In the future, Shorewall may make additional use of nesting information. TYPE ipv4 This is the standard Shorewall 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 /etc/shorewall/hosts. ipsec Communication with all zone hosts is encrypted. Your kernel and iptables must include policy match support. fw 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. OPTIONS, IN OPTIONS and OUT OPTIONS A comma-separated list of options. 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 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 "-". /etc/shorewall/zones shorewall(8), shorewall-accounting(5), shorewall-actions(5), shorewall-blacklist(5), shorewall-hosts(5), shorewall-interfaces(5), shorewall-ipsec(5), shorewall-maclist(5), shorewall-masq(5), shorewall-nat(5), shorewall-netmap(5), shorewall-params(5), shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5), shorewall-route_routes(5), shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5), shorewall-tcclasses(5), shorewall-tcdevices(5), shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5)