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Change 'local' interface option to a zone type.

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Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep 2013-05-19 15:35:20 -07:00
parent 1e6578c759
commit ac02c484f5
7 changed files with 213 additions and 40 deletions
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12
Shorewall/Perl/Shorewall/Misc.pm
View File

@ -836,7 +836,7 @@ sub add_common_rules ( $ ) {
my $interfaceref = find_interface $interface;
unless ( $interfaceref->{options}{ignore} & NO_SFILTER || $interfaceref->{options}{rpfilter} ) {
unless ( $interfaceref->{options}{ignore} & NO_SFILTER || $interfaceref->{options}{rpfilter} || $interfaceref->{physical} eq 'lo' ) {
my @filters = @{$interfaceref->{filter}};
@ -1520,7 +1520,7 @@ sub add_interface_jumps {
my @interfaces = grep $_ ne '%vserver%', @_;
my $dummy;
my $loref = known_interface('lo');
my $lo_jump_added = $loref && $loref->{options}{local} && ! $loref->{options}{destonly};
my $lo_jump_added = local_zone;
#
# Add Nat jumps
#
@ -2169,13 +2169,15 @@ sub generate_matrix() {
#
# FORWARDING Jump for non-IPSEC host group
#
add_forward_jump( $zone, $interface, $hostref, $net, $exclusions, $frwd_ref, $isport, $bridge ) if $frwd_ref && ( $hostref->{ipsec} ne 'ipsec' && ! $hostref->{options}{local} );
add_forward_jump( $zone, $interface, $hostref, $net, $exclusions, $frwd_ref, $isport, $bridge ) if $frwd_ref && $hostref->{ipsec} ne 'ipsec' && $zoneref->{type} ne LOCAL;
}
} # Subnet Loop
} # Hostref Loop
} # Interface Loop
} #Type Loop
next if $zoneref->{type} == LOCAL;
if ( $frwd_ref ) {
#
# F O R W A R D I N G
@ -2197,6 +2199,8 @@ sub generate_matrix() {
next if $filter_table->{rules_chain( ${zone}, ${zone1} )}->{policy} eq 'NONE';
next if $zone1ref->{type} == LOCAL;
my $chain = rules_target $zone, $zone1;
next unless $chain; # CONTINUE policy with no rules
@ -2216,7 +2220,7 @@ sub generate_matrix() {
for my $typeref ( values %{$zone1ref->{hosts}} ) {
for my $interface ( sort { interface_number( $a ) <=> interface_number( $b ) } keys %$typeref ) {
for my $hostref ( @{$typeref->{$interface}} ) {
next if $hostref->{options}{sourceonly} || $hostref->{options}{local};
next if $hostref->{options}{sourceonly};
if ( $zone ne $zone1 || $num_ifaces > 1 || $hostref->{options}{routeback} ) {
my @ipsec_out_match = match_ipsec_out $zone1 , $hostref;
my $dest_exclusion = dest_exclusion( $hostref->{exclusions}, $chain);

6
Shorewall/Perl/Shorewall/Rules.pm
View File

@ -2441,15 +2441,15 @@ sub process_rule ( $$$$$$$$$$$$$$$$$$$ ) {
}
}
#
# Handle 'local' zone warnings
# Handle 'local' warnings
#
unless ( $wildcard ) {
if ( $sourceref ) {
warning_message( "The SOURCE zone in this rule is 'destonly'" ) if $sourceref->{destonly};
if ( $destref ) {
warning_message( "The SOURCE zone is local and the DEST zone is off-firewall" ) if $sourceref->{local} && ! ( $destref->{type} & ( FIREWALL | VSERVER ) );
warning_message( "The SOURCE zone is off-firewall and the DEST zone is 'local'" ) if $destref->{local} && ! ( $sourceref->{type} & ( FIREWALL | VSERVER ) );
warning_message( "The SOURCE zone is local and the DEST zone is off-firewall" ) if $sourceref->{type} == LOCAL && ! ( $destref->{type} & ( FIREWALL | VSERVER ) );
warning_message( "The SOURCE zone is off-firewall and the DEST zone is 'local'" ) if $destref->{type} == LOCAL && ! ( $sourceref->{type} & ( FIREWALL | VSERVER ) );
}
}
}

59
Shorewall/Perl/Shorewall/Zones.pm
View File

@ -38,6 +38,7 @@ our @EXPORT = ( qw( NOTHING
IPSECMODE
FIREWALL
VSERVER
LOCAL
IP
BPORT
IPSEC
@ -50,6 +51,7 @@ our @EXPORT = ( qw( NOTHING
dump_zone_contents
find_zone
firewall_zone
local_zone
defined_zone
zone_type
zone_interfaces
@ -58,6 +60,7 @@ our @EXPORT = ( qw( NOTHING
all_parent_zones
complex_zones
vserver_zones
local_zone
on_firewall_zones
off_firewall_zones
non_firewall_zones
@ -152,6 +155,7 @@ our @zones;
our %zones;
our %zonetypes;
our $firewall_zone;
our $local_zone;
our %reservedName = ( all => 1,
any => 1,
@ -211,7 +215,9 @@ use constant { FIREWALL => 1,
IP => 2,
BPORT => 4,
IPSEC => 8,
VSERVER => 16 };
VSERVER => 16,
LOCAL => 32
};
use constant { SIMPLE_IF_OPTION => 1,
BINARY_IF_OPTION => 2,
@ -278,6 +284,7 @@ sub initialize( $$ ) {
@zones = ();
%zones = ();
$firewall_zone = '';
$local_zone = '';
$have_ipsec = undef;
@interfaces = ();
@ -303,7 +310,6 @@ sub initialize( $$ ) {
dhcp => SIMPLE_IF_OPTION,
ignore => NUMERIC_IF_OPTION + IF_OPTION_WILDOK,
maclist => SIMPLE_IF_OPTION + IF_OPTION_HOST,
local => SIMPLE_IF_OPTION + IF_OPTION_HOST,
logmartians => BINARY_IF_OPTION,
nets => IPLIST_IF_OPTION + IF_OPTION_ZONEONLY + IF_OPTION_VSERVER,
norfc1918 => OBSOLETE_IF_OPTION,
@ -334,7 +340,7 @@ sub initialize( $$ ) {
sourceonly => 1,
mss => 1,
);
%zonetypes = ( 1 => 'firewall', 2 => 'ipv4', 4 => 'bport4', 8 => 'ipsec4', 16 => 'vserver' );
%zonetypes = ( 1 => 'firewall', 2 => 'ipv4', 4 => 'bport4', 8 => 'ipsec4', 16 => 'vserver', 32 => 'local' );
} else {
%validinterfaceoptions = ( accept_ra => NUMERIC_IF_OPTION,
blacklist => SIMPLE_IF_OPTION + IF_OPTION_HOST,
@ -342,7 +348,6 @@ sub initialize( $$ ) {
destonly => SIMPLE_IF_OPTION + IF_OPTION_HOST,
dhcp => SIMPLE_IF_OPTION,
ignore => NUMERIC_IF_OPTION + IF_OPTION_WILDOK,
local => SIMPLE_IF_OPTION + IF_OPTION_HOST,
maclist => SIMPLE_IF_OPTION + IF_OPTION_HOST,
nets => IPLIST_IF_OPTION + IF_OPTION_ZONEONLY + IF_OPTION_VSERVER,
nosmurfs => SIMPLE_IF_OPTION + IF_OPTION_HOST,
@ -384,6 +389,8 @@ sub parse_zone_option_list($$\$$)
my $fmt;
if ( $list ne '-' ) {
fatal_error "The 'local' zone may not have $column OPTIONS" if $zonetype == LOCAL;
for my $e ( split_list $list, 'option' ) {
my $val = undef;
my $invert = '';
@ -491,6 +498,11 @@ sub process_zone( \$ ) {
} elsif ( $type eq '-' ) {
$type = IP;
$$ip = 1;
} elsif ( $type eq 'local' ) {
fatal_error 'The local zone may not be nested' if @parents;
fatal_error "Only one local zone may be defined ($zone)" if $local_zone;
$local_zone = $zone;
$type = LOCAL;
} else {
fatal_error "Invalid zone type ($type)";
}
@ -568,6 +580,8 @@ sub process_zone( \$ ) {
#
# Parse the zones file.
#
sub vserver_zones();
sub determine_zones()
{
my @z;
@ -586,6 +600,7 @@ sub determine_zones()
fatal_error "No firewall zone defined" unless $firewall_zone;
fatal_error "No IP zones defined" unless $ip;
fatal_error "The local zone and vserver zones are mutually exclusive" if $local_zone && vserver_zones;
#
# Topological sort to place sub-zones before all of their parents
#
@ -750,7 +765,6 @@ sub add_group_to_zone($$$$$)
$interfaceref = $interfaces{$interface};
$zoneref->{interfaces}{$interface} = 1;
$zoneref->{destonly} ||= $interfaceref->{options}{destonly};
$zoneref->{local} ||= $interfaceref->{options}{local};
$interfaceref->{zones}{$zone} = 1;
@ -892,6 +906,10 @@ sub firewall_zone() {
$firewall_zone;
}
sub local_zone() {
$local_zone;
}
#
# Determine if the passed physical device is a bridge
#
@ -1287,6 +1305,37 @@ sub process_interface( $$ ) {
};
if ( $zone ) {
if ( $physical eq 'lo' ) {
fatal_error "Only a local zone may be assigned to 'lo'" unless $zoneref->{type} == LOCAL;
fatal_error "The local zone may not have nets specified" if $netsref;
fatal_error "Invalid definition of 'lo'" if $bridge ne $interface;
for ( qw/arp_filter
arp_ignore
blacklist
bridge
detectnets
dhcp
maclist
logmartians
norfc1918
nosmurts
proxyarp
routeback
routefilter
rpfilter
sfilter
sourceroute
upnp
upnpclient
mss
/ ) {
fatal_error "The 'lo' interface may not specify the '$_' option" if supplied $options{$_};
}
} else {
fatal_error "The local zone may only be assigned to 'lo'" if $zoneref->{type} == LOCAL;
}
$netsref ||= [ allip ];
add_group_to_zone( $zone, $zoneref->{type}, $interface, $netsref, $hostoptionsref );
add_group_to_zone( $zone,

23
Shorewall/manpages/shorewall-interfaces.xml
View File

@ -150,6 +150,11 @@ loc eth2 -</programlisting>
<member>wait</member>
</simplelist>
<para>Beginning with Shorewall 4.5.17, if you specify a zone for the
'lo' interface, then that zone must be defined as type
<option>local</option> in <ulink
url="shorewall6-zones.html">shorewall6-zones</ulink>(5).</para>
</listitem>
</varlistentry>
@ -205,7 +210,7 @@ loc eth2 -</programlisting>
changed; the value assigned to the setting will be the value
specified (if any) or 1 if no value is given.</para>
<para/>
<para></para>
<note>
<para>This option does not work with a wild-card
@ -239,7 +244,7 @@ loc eth2 -</programlisting>
<para>8 - do not reply for all local addresses</para>
<para/>
<para></para>
<note>
<para>This option does not work with a wild-card
@ -247,7 +252,7 @@ loc eth2 -</programlisting>
the INTERFACE column.</para>
</note>
<para/>
<para></para>
<warning>
<para>Do not specify <emphasis
@ -374,16 +379,6 @@ loc eth2 -</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">local</emphasis></term>
<listitem>
<para>Added in Shorewall 4.5.17. Causes the compiler to omit
rules from this interface to other interfaces and from other
interfaces to this interface.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis
role="bold">logmartians[={0|1}]</emphasis></term>
@ -416,7 +411,7 @@ loc eth2 -</programlisting>
1
teastep@lists:~$ </programlisting>
<para/>
<para></para>
<note>
<para>This option does not work with a wild-card

69
Shorewall/manpages/shorewall-zones.xml
View File

@ -135,8 +135,8 @@ c:a,b ipv4</programlisting>
<para>This is the standard Shorewall zone type and is the
default if you leave this column empty or if you enter "-" in
the column. Communication with some zone hosts may be
encrypted. Encrypted hosts are designated using the
'ipsec' option in <ulink
encrypted. Encrypted hosts are designated using the 'ipsec'
option in <ulink
url="shorewall-hosts.html">shorewall-hosts</ulink>(5).</para>
</listitem>
</varlistentry>
@ -187,6 +187,71 @@ c:a,b ipv4</programlisting>
firewall zone.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">local</emphasis></term>
<listitem>
<para>Added in Shorewall 4.5.17.</para>
<para>Normally, Shorewall treats the loopback interface (lo)
in the following way:</para>
<itemizedlist>
<listitem>
<para>By default, all traffic through the interface is
ACCEPTed.</para>
</listitem>
<listitem>
<para>If a $FW -&gt; $FW policy is defined or $FW -&gt;
$FW rules are defined, they are placed in a chain named
${FW}2${F2} or ${FW}-${FW} (e.g., 'fw2fw' or 'fw-fw' )
depending on the ZONE2ZONE setting in <ulink
url="shorewall.conf.html">shorewall.conf</ulink>(5).</para>
</listitem>
<listitem>
<para>$FW -&gt; $FW traffic is only filtered in the OUTPUT
chain.</para>
</listitem>
</itemizedlist>
<para>By defining a <emphasis role="bold">local</emphasis>
zone and associating it with the loopback interface in
shorewall-interfaces(5), you can effect a slightly different
model. Suppose that the <emphasis role="bold">local</emphasis>
zone name is 'local'; then:</para>
<itemizedlist>
<listitem>
<para>Both $FW -&gt; local and local -&gt; $FW chains are
created.</para>
</listitem>
<listitem>
<para>The $FW -&gt; local and local -&gt; $FW policies may
be different.</para>
</listitem>
<listitem>
<para>Both $FW -&gt; local and local -&gt; $FW rules may
be specified.</para>
</listitem>
</itemizedlist>
<para>Rules to/from the <emphasis role="bold">local</emphasis>
zone and any zone other than the firewall zone are ignored
with a warning.</para>
<para>Only one <emphasis role="bold">local</emphasis> zone may
be defined.</para>
<para>When a local zone is defined, you should ensure that the
$FW -&gt; $FW policy is ACCEPT; otherwise, extraneous chains
and rules will be created.</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>

15
Shorewall6/manpages/shorewall6-interfaces.xml
View File

@ -84,6 +84,11 @@
loc eth1 -
loc eth2 -</programlisting>
</blockquote>
<para>Beginning with Shorewall 4.5.17, if you specify a zone for the
'lo' interface, then that zone must be defined as type
<option>local</option> in <ulink
url="shorewall6-zones.html">shorewall6-zones</ulink>(5).</para>
</listitem>
</varlistentry>
@ -315,16 +320,6 @@ loc eth2 -</programlisting>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">local</emphasis></term>
<listitem>
<para>Added in Shorewall 4.5.17. Causes the compiler to omit
rules from this interface to other interfaces and from other
interfaces to this interface.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis
role="bold">mss</emphasis>=<emphasis>number</emphasis></term>

69
Shorewall6/manpages/shorewall6-zones.xml
View File

@ -133,8 +133,8 @@ c:a,b ipv6</programlisting>
<para>This is the standard Shorewall6 zone type and is the
default if you leave this column empty or if you enter "-" in
the column. Communication with some zone hosts may be
encrypted. Encrypted hosts are designated using the
'ipsec' option in <ulink
encrypted. Encrypted hosts are designated using the 'ipsec'
option in <ulink
url="shorewall6-hosts.html">shorewall6-hosts</ulink>(5).</para>
</listitem>
</varlistentry>
@ -185,6 +185,71 @@ c:a,b ipv6</programlisting>
firewall zone.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">local</emphasis></term>
<listitem>
<para>Added in Shorewall 4.5.17.</para>
<para>Normally, Shorewall treats the loopback interface (lo)
in the following way:</para>
<itemizedlist>
<listitem>
<para>By default, all traffic through the interface is
ACCEPTed.</para>
</listitem>
<listitem>
<para>If a $FW -&gt; $FW policy is defined or $FW -&gt;
$FW rules are defined, they are placed in a chain named
${FW}2${F2} or ${FW}-${FW} (e.g., 'fw2fw' or 'fw-fw' )
depending on the ZONE2ZONE setting in <ulink
url="shorewall6.conf.html">shorewall6.conf</ulink>(5).</para>
</listitem>
<listitem>
<para>$FW -&gt; $FW traffic is only filtered in the OUTPUT
chain.</para>
</listitem>
</itemizedlist>
<para>By defining a <emphasis role="bold">local</emphasis>
zone and associating it with the loopback interface in
shorewall-interfaces(5), you can effect a slightly different
model. Suppose that the <emphasis role="bold">local</emphasis>
zone name is 'local'; then:</para>
<itemizedlist>
<listitem>
<para>Both $FW -&gt; local and local -&gt; $FW chains are
created.</para>
</listitem>
<listitem>
<para>The $FW -&gt; local and local -&gt; $FW policies may
be different.</para>
</listitem>
<listitem>
<para>Both $FW -&gt; local and local -&gt; $FW rules may
be specified.</para>
</listitem>
</itemizedlist>
<para>Rules to/from the <emphasis role="bold">local</emphasis>
zone and any zone other than the firewall zone are ignored
with a warning.</para>
<para>Only one <emphasis role="bold">local</emphasis> zone may
be defined.</para>
<para>When a local zone is defined, you should ensure that the
$FW -&gt; $FW policy is ACCEPT; otherwise, extraneous chains
and rules will be created.</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>