SHOREWALL-POLICY(5) | [FIXME: manual] | SHOREWALL-POLICY(5) |
NAME¶
policy - Shorewall policy fileSYNOPSIS¶
/etc/shorewall/policy
DESCRIPTION¶
This file defines the high-level policy for connections between zones defined in shorewall-zones[1](5).Source zone. Must be the name of a zone
defined in shorewall-zones[1](5), $FW or "all".
DEST - zone|$FW|all
Destination zone. Must be the name of a zone
defined in shorewall-zones[1](5), $FW or "all". If the DEST
is a bport zone, then the SOURCE must be "all", another bport zone
associated with the same bridge, or it must be an ipv4 zone that is associated
with only the same bridge.
POLICY -
{ACCEPT|DROP|REJECT|CONTINUE|QUEUE|
NFQUEUE[(
queuenumber)]|NONE}[:{default-action-or-macro|
None}]
Policy if no match from the rules file is
found.
If the policy is neither CONTINUE nor NONE then the policy may be followed by
":" and one of the following:
Possible policies are:
ACCEPT
LOG LEVEL (loglevel) - [log-level|ULOG|NFLOG]
1.The word "None" or
"none". This causes any default action defined in
shorewall.conf[2](5) to be omitted for this policy.
2.The name of an action (requires that
USE_ACTIONS=Yes in shorewall.conf[2](5)). That action will be invoked
before the policy is enforced.
3.The name of a macro. The rules in that
macro will be applied before the policy is enforced. This does not require
USE_ACTIONS=Yes.
Accept the connection.
DROP
Ignore the connection request.
REJECT
For TCP, send RST. For all other, send an
"unreachable" ICMP.
QUEUE
Queue the request for a user-space application
such as Snort-inline.
NFQUEUE
Queue the request for a user-space application
using the nfnetlink_queue mechanism. If a queuenumber is not given,
queue zero (0) is assumed.
CONTINUE
Pass the connection request past any other
rules that it might also match (where the source or destination zone in those
rules is a superset of the SOURCE or DEST in this policy). See
shorewall-nesting[3](5) for additional information.
NONE
Assume that there will never be any packets
from this SOURCE to this DEST. Shorewall will not create any infrastructure to
handle such packets and you may not have any rules with this SOURCE and DEST
in the /etc/shorewall/rules file. If such a packet is received, the
result is undefined. NONE may not be used if the SOURCE or DEST columns
contain the firewall zone ($FW) or "all".
Optional - if supplied, each connection
handled under the default POLICY is logged at that level. If not supplied, no
log message is generated. See syslog.conf(5) for a description of log levels.
You may also specify ULOG or NFLOG (must be in upper case). This will log to the
ULOG or NFLOG target and will send to a separate log through use of ulogd (
http://www.netfilter.org/projects/ulogd/index.html).
If you don't want to log but need to specify the following column, place
"-" here.
BURST:LIMIT (limit) -
[{s|d}:[[name]:]]]rate/{second|minute}[:burst]
If passed, specifies the maximum TCP
connection rate and the size of an acceptable burst. If not
specified, TCP connections are not limited. If the burst parameter is
omitted, a value of 5 is assumed.
When s: or d: is specified, the rate applies per source IP address
or per destination IP address respectively. The name may be chosen by
the user and specifies a hash table to be used to count matching connections.
If not give, the name shorewall is assumed. Where more than one POLICY
specifies the same name, the connections counts for the policies are
aggregated and the individual rates apply to the aggregated count.
CONNLIMIT - limit[:mask]
May be used to limit the number of
simultaneous connections from each individual host to limit
connections. While the limit is only checked on connections to which this
policy could apply, the number of current connections is calculated over all
current connections from the SOURCE host. By default, the limit is applied to
each host individually but can be made to apply to networks of hosts by
specifying a mask. The mask specifies the width of a VLSM mask
to be applied to the source address; the number of current connections is then
taken over all hosts in the subnet source-address/mask.
EXAMPLE¶
1.All connections from the local network to
the internet are allowed
2.All connections from the internet are
ignored but logged at syslog level KERNEL.INFO.
3.All other connection requests are rejected
and logged at level KERNEL.INFO.
#SOURCE DEST POLICY LOG BURST:LIMIT # LEVEL loc net ACCEPT net all DROP info # # THE FOLLOWING POLICY MUST BE LAST # all all REJECT info
FILES¶
/etc/shorewall/policySEE ALSO¶
http://shorewall.net/configuration_file_basics.htm#Pairs shorewall(8), shorewall-accounting(5), shorewall-actions(5), shorewall-blacklist(5), shorewall-hosts(5), shorewall_interfaces(5), shorewall-ipsets(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-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.conf
- 3.
- shorewall-nesting
06/28/2012 | [FIXME: source] |