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Implement parameterized default actions for IPv6

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Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep 2011-07-04 07:13:32 -07:00
parent 901b71a85c
commit caa0a12e8c
3 changed files with 117 additions and 33 deletions
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44
Shorewall6/action.AllowICMPs
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@ -8,33 +8,37 @@
###############################################################################
#TARGET SOURCE DEST PROTO DEST
# PORT(S)
FORMAT 2
DEFAULTS ACCEPT
COMMENT Needed ICMP types (RFC4890)
ACCEPT - - ipv6-icmp destination-unreachable
ACCEPT - - ipv6-icmp packet-too-big
ACCEPT - - ipv6-icmp time-exceeded
ACCEPT - - ipv6-icmp parameter-problem
$1 - - ipv6-icmp destination-unreachable
$1 - - ipv6-icmp packet-too-big
$1 - - ipv6-icmp time-exceeded
$1 - - ipv6-icmp parameter-problem
# The following should have a ttl of 255 and must be allowed to transit a bridge
ACCEPT - - ipv6-icmp router-solicitation
ACCEPT - - ipv6-icmp router-advertisement
ACCEPT - - ipv6-icmp neighbour-solicitation
ACCEPT - - ipv6-icmp neighbour-advertisement
ACCEPT - - ipv6-icmp 137 # Redirect
ACCEPT - - ipv6-icmp 141 # Inverse neighbour discovery solicitation
ACCEPT - - ipv6-icmp 142 # Inverse neighbour discovery advertisement
$1 - - ipv6-icmp router-solicitation
$1 - - ipv6-icmp router-advertisement
$1 - - ipv6-icmp neighbour-solicitation
$1 - - ipv6-icmp neighbour-advertisement
$1 - - ipv6-icmp 137 # Redirect
$1 - - ipv6-icmp 141 # Inverse neighbour discovery solicitation
$1 - - ipv6-icmp 142 # Inverse neighbour discovery advertisement
# The following should have a link local source address and must be allowed to transit a bridge
ACCEPT fe80::/10 - ipv6-icmp 130 # Listener query
ACCEPT fe80::/10 - ipv6-icmp 131 # Listener report
ACCEPT fe80::/10 - ipv6-icmp 132 # Listener done
ACCEPT fe80::/10 - ipv6-icmp 143 # Listener report v2
$1 fe80::/10 - ipv6-icmp 130 # Listener query
$1 fe80::/10 - ipv6-icmp 131 # Listener report
$1 fe80::/10 - ipv6-icmp 132 # Listener done
$1 fe80::/10 - ipv6-icmp 143 # Listener report v2
# The following should be received with a ttl of 255 and must be allowed to transit a bridge
ACCEPT - - ipv6-icmp 148 # Certificate path solicitation
ACCEPT - - ipv6-icmp 149 # Certificate path advertisement
$1 - - ipv6-icmp 148 # Certificate path solicitation
$1 - - ipv6-icmp 149 # Certificate path advertisement
# The following should have a link local source address and a ttl of 1 and must be allowed to transit abridge
ACCEPT fe80::/10 - ipv6-icmp 151 # Multicast router advertisement
ACCEPT fe80::/10 - ipv6-icmp 152 # Multicast router solicitation
ACCEPT fe80::/10 - ipv6-icmp 153 # Multicast router termination
$1 fe80::/10 - ipv6-icmp 151 # Multicast router advertisement
$1 fe80::/10 - ipv6-icmp 152 # Multicast router solicitation
$1 fe80::/10 - ipv6-icmp 153 # Multicast router termination

52
Shorewall6/action.Drop
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@ -15,32 +15,72 @@
# 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!!!!!!!!!
#
###############################################################################
FORMAT 2
#
# The following magic provides different defaults for $2 thru $5, when $1 is
# 'audit'.
#
BEGIN PERL
use Shorewall::Config;
my ( $p1, $p2, $p3 , $p4, $p5 ) = get_action_params( 5 );
if ( defined $p1 ) {
if ( $p1 eq 'audit' ) {
set_action_param( 2, 'A_REJECT') unless supplied $p2;
set_action_param( 3, 'A_DROP') unless supplied $p3;
set_action_param( 4, 'A_ACCEPT' ) unless supplied $p4;
set_action_param( 5, 'A_DROP' ) unless supplied $p5;
} else {
fatal_error "Invalid value ($p1) for first Drop parameter" if supplied $p1;
}
}
1;
END PERL
DEFAULTS -,REJECT,DROP,ACCEPT,DROP
#TARGET SOURCE DEST PROTO DPORT SPORT
#
# Reject 'auth'
#
Auth(REJECT)
Auth($2)
#
# ACCEPT critical ICMP types
#
AllowICMPs - - ipv6-icmp
AllowICMPs($4) - - ipv6-icmp
#
# Drop Broadcasts so they don't clutter up the log
# (broadcasts must *not* be rejected).
#
dropBcast
dropBcast($1)
#
# Drop packets that are in the INVALID state -- these are usually ICMP packets
# and just confuse people when they appear in the log.
#
dropInvalid
dropInvalid($1)
#
# Drop Microsoft noise so that it doesn't clutter up the log.
#
SMB(DROP)
SMB($3)
#
# Drop 'newnotsyn' traffic so that it doesn't get logged.
#
@ -49,4 +89,4 @@ dropNotSyn - - tcp
# Drop late-arriving DNS replies. These are just a nuisance and clutter up
# the log.
#
DropDNSrep
DropDNSrep($5)

54
Shorewall6/action.Reject
View File

@ -12,39 +12,79 @@
# b) 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 REJECT or A_REJECT,
# 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!!!!!!!!!
###############################################################################
FORMAT 2
#
# The following magic provides different defaults for $2 thru $5, when $1 is
# 'audit'.
#
BEGIN PERL
use Shorewall::Config;
my ( $p1, $p2, $p3 , $p4, $p5 ) = get_action_params( 5 );
if ( defined $p1 ) {
if ( $p1 eq 'audit' ) {
set_action_param( 2, 'A_REJECT') unless supplied $p2;
set_action_param( 3, 'A_REJECT') unless supplied $p3;
set_action_param( 4, 'A_ACCEPT' ) unless supplied $p4;
set_action_param( 5, 'A_DROP' ) unless supplied $p5;
} else {
fatal_error "Invalid value ($p1) for first Reject parameter" if supplied $p1;
}
}
1;
END PERL
DEFAULTS -,REJECT,REJECT,ACCEPT,DROP
#TARGET SOURCE DEST PROTO
#
# Don't log 'auth' -- REJECT
#
Auth(REJECT)
Auth($2)
#
# Drop Multicasts so they don't clutter up the log
# (broadcasts must *not* be rejected).
#
AllowICMPs - - ipv6-icmp
AllowICMPs($4) - - ipv6-icmp
#
# Drop Broadcasts so they don't clutter up the log
# (broadcasts must *not* be rejected).
#
dropBcast
dropBcast($1)
#
# Drop packets that are in the INVALID state -- these are usually ICMP packets
# and just confuse people when they appear in the log (these ICMPs cannot be
# rejected).
#
dropInvalid
dropInvalid($1)
#
# Reject Microsoft noise so that it doesn't clutter up the log.
#
SMB(REJECT)
SMB($3)
#
# Drop 'newnotsyn' traffic so that it doesn't get logged.
#
dropNotSyn - - tcp
dropNotSyn($1) - - tcp
#
# Drop late-arriving DNS replies. These are just a nuisance and clutter up
# the log.
#
DropDNSrep
DropDNSrep($5)