SHOREWALL-HOSTS(5) | [FIXME: manual] | SHOREWALL-HOSTS(5) |
NAME¶
hosts - Shorewall fileSYNOPSIS¶
/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[1](5) determines the order in which the records in this file are interpreted.The name of a zone declared in
shorewall-zones[1](5). You may not list the firewall zone in this
column.
HOST(S) -
interface:{[{address-or-range[,address-or-range]...|
+ipset|dynamic}[exclusion]
The name of an interface defined in the
shorewall-interfaces[2](5) file followed by a colon (":") and
a comma-separated list whose elements are either:
You may also exclude certain hosts through use of an exclusion (see
shorewall-exclusion[3](5).
OPTIONS (Optional) - [option[,option]...]
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.The name of an ipset.
5.The word dynamic which makes the
zone dynamic in that you can use the shorewall add and shorewall
delete commands to change to composition of the zone.
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.
blacklist
Check packets arriving on this port against
the shorewall-blacklist[4](5) file.
broadcast
Used when you want to include limited
broadcasts (destination IP address 255.255.255.255) from the firewall to this
zone. Only necessary when:
destonly
1.The network specified in the HOST(S) column
does not include 255.255.255.255.
2.The zone does not have an entry for this
interface in shorewall-interfaces[2](5).
Normally used with the Multi-cast IP address
range (224.0.0.0/4). Specifies that traffic will be sent to the specified
net(s) but that no traffic will be received from the net(s).
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[1](5) file then you do NOT need to specify
the 'ipsec' option here.
maclist
Connection requests from these hosts are
compared against the contents of shorewall-maclist[5](5). If this
option is specified, the interface must be an ethernet NIC or equivalent and
must be up before Shorewall is started.
mss=mss
Added in Shorewall 4.5.2. When present, causes
the TCP mss for new connections to/from the hosts given in the HOST(S) column
to be clamped at the specified mss.
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[6](5). After logging, the packets are dropped.
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.
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.
EXAMPLES¶
Example 1The firewall runs a PPTP server which creates
a ppp interface for each remote client. The clients are assigned IP addresses
in the network 192.168.3.0/24 and in a zone named 'vpn'.
#ZONE HOST(S) OPTIONS vpn ppp+:192.168.3.0/24
FILES¶
/etc/shorewall/hostsSEE ALSO¶
http://shorewall.net/configuration_file_basics.htm#Pairs shorewall(8), shorewall-accounting(5), shorewall-actions(5), shorewall-blacklist(5), shorewall_interfaces(5), shorewall-ipsets(5), shorewall-maclist(5), shorewall-masq(5), shorewall-nat(5), shorewall-nesting(5), shorewall-netmap(5), shorewall-params(5), shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5), shorewall-rtrules(5), shorewall-routestopped(5), shorewall-rules(5), shorewall.conf(5), shorewall-secmarks(5), shorewall-tcclasses(5), shorewall-tcdevices(5), shorewall-tcrules(5), shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)NOTES¶
- 1.
- shorewall-zones
- 2.
- shorewall-interfaces
- 3.
- shorewall-exclusion
- 4.
- shorewall-blacklist
- 5.
- shorewall-maclist
- 6.
- shorewall.conf
06/28/2012 | [FIXME: source] |