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shorewall-hosts

NAME

hosts - Shorewall file

SYNOPSIS

/etc/shorewall/hosts

DESCRIPTION

This file is used to define zones in terms of subnets and/or individual IP addresses. Most simple setups don't need to (should not) place anything in this file.

The order of entries in this file is not significant in determining zone composition. Rather, the order that the zones are declared in shorewall-zones(5) determines the order in which the records in this file are interpreted.

Warning
The only time that you need this file is when you have more than one zone connected through a single interface.

Warning
If you have an entry for a zone and interface in shorewall-interfaces(5) then do not include any entries in this file for that same (zone, interface) pair.

The columns in the file are as follows.

ZONE --- zone-name

The name of a zone declared in shorewall-zones(5). You may not list the firewall zone in this column.

HOST(S) --- interface:{[bridge-port:]{address-or-range[,address-or-range]...|+ipset}[exclusion]

The name of an interface defined in the shorewall-interfaces(5) file followed by a colon (":") and a comma-separated list whose elements are either:

1.

The IP address of a host.

2.

A network in CIDR format.

3.

An IP address range of the form low.address-high.address. Your kernel and iptables must have iprange match support.

4.

A physical bridge-port name; only allowed when the interface names a bridge created by the brctl(8) addbr command. This port must not be defined in shorewall-interfaces(5) and may be optionally followed by a colon (":") and a host or network IP or a range. See http://www.shorewall.net/bridge.html for details. Specifying a physical port name requires that you have BRIDGING=Yes in shorewall.conf(5).

5.

The name of an ipset.

You may also exclude certain hosts through use of an exclusion (see shorewall-exclusion(5).

OPTIONS (Optional) --- [option[,option]...]

A comma-separated list of options from the following list. The order in which you list the options is not significant but the list must have no embedded white space.

maclist

Connection requests from these hosts are compared against the contents of shorewall-maclist(5). If this option is specified, the interface must be an ethernet NIC or equivalent and must be up before Shorewall is started.

routeback

Shorewall should set up the infrastructure to pass packets from this/these address(es) back to themselves. This is necessary if hosts in this group use the services of a transparent proxy that is a member of the group or if DNAT is used to send requests originating from this group to a server in the group.

blacklist

This option only makes sense for ports on a bridge.

Check packets arriving on this port against the shorewall-blacklist(5) file.

tcpflags

Packets arriving from these hosts are checked for certain illegal combinations of TCP flags. Packets found to have such a combination of flags are handled according to the setting of TCP_FLAGS_DISPOSITION after having been logged according to the setting of TCP_FLAGS_LOG_LEVEL.

nosmurfs

This option only makes sense for ports on a bridge.

Filter packets for smurfs (packets with a broadcast address as the source).

Smurfs will be optionally logged based on the setting of SMURF_LOG_LEVEL in shorewall.conf(5). After logging, the packets are dropped.

ipsec

The zone is accessed via a kernel 2.6 ipsec SA. Note that if the zone named in the ZONE column is specified as an IPSEC zone in the shorewall-zones(5) file then you do NOT need to specify the 'ipsec' option here.

FILES

/etc/shorewall/hosts

SEE ALSO

http://www.shorewall.net/Documentation.htm#Hosts

shorewall(8), shorewall-accounting(5), shorewall-actions(5), shorewall-blacklist(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), shorewall-zones(5)