forked from extern/shorewall_code
79 lines
2.2 KiB
Plaintext
79 lines
2.2 KiB
Plaintext
#
|
|
# Shorewall6 version 5 - Drop Action
|
|
#
|
|
# /usr/share/shorewall6/action.Drop
|
|
#
|
|
# The default DROP common rules
|
|
#
|
|
# This action is invoked before a DROP policy is enforced. The purpose
|
|
# of the action is:
|
|
#
|
|
# a) Avoid logging lots of useless cruft.
|
|
# b) Ensure that 'auth' requests are rejected, even if the policy is
|
|
# DROP. Otherwise, you may experience problems establishing
|
|
# connections with servers that use auth.
|
|
# c) Ensure that certain ICMP packets that are necessary for successful
|
|
# internet operation are always ACCEPTed.
|
|
#
|
|
# The action accepts five optional parameters:
|
|
#
|
|
# 1 - 'audit' or '-'. Default is '-' which means don't audit in builtin
|
|
# actions.
|
|
# 2 - Action to take with Auth requests. Default is REJECT or A_REJECT,
|
|
# depending on the setting of the first parameter.
|
|
# 3 - Action to take with SMB requests. Default is DROP or A_DROP,
|
|
# depending on the setting of the first parameter.
|
|
# 4 - Action to take with required ICMP packets. Default is ACCEPT or
|
|
# A_ACCEPT depending on the first parameter.
|
|
# 5 - Action to take with late UDP replies (UDP source port 53). Default
|
|
# is DROP or A_DROP depending on the first parameter.
|
|
#
|
|
# IF YOU ARE HAVING CONNECTION PROBLEMS, CHANGING THIS FILE WON'T HELP!!!!!!!!!
|
|
#
|
|
###############################################################################
|
|
|
|
?if passed($1)
|
|
?if $1 eq 'audit'
|
|
DEFAULTS -,A_REJECT,A_DROP,A_ACCEPT,A_DROP
|
|
?else
|
|
?error The first parameter to Drop must be 'audit' or '-'
|
|
?endif
|
|
?else
|
|
DEFAULTS -,REJECT,DROP,ACCEPT,DROP
|
|
?endif
|
|
|
|
#TARGET SOURCE DEST PROTO DPORT SPORT
|
|
#
|
|
# Reject 'auth'
|
|
#
|
|
?if passed($2)
|
|
Auth($2)
|
|
?endif
|
|
#
|
|
# ACCEPT critical ICMP types
|
|
#
|
|
AllowICMPs($4) - - ipv6-icmp
|
|
#
|
|
# Drop Broadcasts so they don't clutter up the log
|
|
# (broadcasts must *not* be rejected).
|
|
#
|
|
Broadcast(DROP,$1)
|
|
#
|
|
# Drop packets that are in the INVALID state -- these are usually ICMP packets
|
|
# and just confuse people when they appear in the log.
|
|
#
|
|
Invalid(DROP,$1)
|
|
#
|
|
# Drop Microsoft noise so that it doesn't clutter up the log.
|
|
#
|
|
SMB($3)
|
|
#
|
|
# Drop 'newnotsyn' traffic so that it doesn't get logged.
|
|
#
|
|
NotSyn(DROP,$1) - - tcp
|
|
#
|
|
# Drop late-arriving DNS replies. These are just a nuisance and clutter up
|
|
# the log.
|
|
#
|
|
DropDNSrep($5)
|