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Support IPv6 Masquerade
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
78babf0941
commit
418034579f
@ -25,7 +25,7 @@
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# loaded after this one and replaces some of the functions declared here.
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#
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SHOREWALL_CAPVERSION=40512
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SHOREWALL_CAPVERSION=40514
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[ -n "${g_program:=shorewall}" ]
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@ -2197,6 +2197,7 @@ determine_capabilities() {
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NFACCT_MATCH=
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CHECKSUM_TARGET=
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ARPTABLESJF=
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MASQUERADE_TGT=
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AMANDA_HELPER=
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FTP_HELPER=
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FTP0_HELPER=
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@ -2228,6 +2229,7 @@ determine_capabilities() {
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else
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qt $g_tool -t nat -A $chain -j SNAT --to-source 2001::1 --persistent && PERSISTENT_SNAT=Yes
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fi
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qt $g_tool -t nat -A $chain -j MASQUERADE && MASQUERADE_TGT=Yes
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qt $g_tool -t nat -F $chain
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qt $g_tool -t nat -X $chain
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fi
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@ -2602,6 +2604,7 @@ report_capabilities_unsorted() {
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report_capability "NFAcct match" $NFACCT_MATCH
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report_capability "Checksum Target" $CHECKSUM_TARGET
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report_capability "Arptables JF" $ARPTABLESJF
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report_capability "MASQUERADE Target" $MASQUERADE_TGT
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report_capability "Amanda Helper" $AMANDA_HELPER
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report_capability "FTP Helper" $FTP_HELPER
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@ -2720,6 +2723,7 @@ report_capabilities_unsorted1() {
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report_capability1 NFACCT_MATCH
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report_capability1 CHECKSUM_TARGET
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report_capability1 ARPTABLESJF
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report_capability1 MASQUERADE_TGT
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report_capability1 AMANDA_HELPER
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report_capability1 FTP_HELPER
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@ -357,6 +357,7 @@ our %capdesc = ( NAT_ENABLED => 'NAT',
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NFACCT_MATCH => 'NFAcct Match',
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CHECKSUM_TARGET => 'Checksum Target',
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ARPTABLESJF => 'Arptables JF',
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MASQUERADE_TGT => 'MASQUERADE Target',
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AMANDA_HELPER => 'Amanda Helper',
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FTP_HELPER => 'FTP Helper',
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FTP0_HELPER => 'FTP-0 Helper',
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@ -649,7 +650,7 @@ sub initialize( $;$$) {
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KLUDGEFREE => '',
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STATEMATCH => '-m state --state',
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VERSION => "4.5.13-Beta3",
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CAPVERSION => 40512 ,
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CAPVERSION => 40514 ,
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);
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#
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# From shorewall.conf file
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@ -901,6 +902,7 @@ sub initialize( $;$$) {
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NFACCT_MATCH => undef,
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CHECKSUM_TARGET => undef,
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ARPTABLESJF => undef,
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MASQUERADE_TGT => undef,
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AMANDA_HELPER => undef,
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FTP_HELPER => undef,
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@ -3561,6 +3563,22 @@ sub Persistent_Snat() {
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$result;
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}
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sub Masquerade_Tgt() {
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have_capability( 'NAT_ENABLED' ) || return '';
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my $result = '';
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my $address = $family == F_IPV4 ? '1.2.3.4' : '2001::1';
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if ( qt1( "$iptables -t nat -N $sillyname" ) ) {
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$result = qt1( "$iptables -t nat -A $sillyname -j MASQUERADE" );
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qt1( "$iptables -t nat -F $sillyname" );
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qt1( "$iptables -t nat -X $sillyname" );
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}
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$result;
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}
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sub Mangle_Enabled() {
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if ( qt1( "$iptables -t mangle -L -n" ) ) {
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system( "$iptables -t mangle -N $sillyname" ) == 0 || fatal_error "Cannot Create Mangle chain $sillyname";
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@ -4075,6 +4093,7 @@ our %detect_capability =
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MANGLE_FORWARD => \&Mangle_Forward,
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MARK => \&Mark,
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MARK_ANYWHERE => \&Mark_Anywhere,
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MASQUERADE_TGT => \&Masquerade_Tgt,
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MULTIPORT => \&Multiport,
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NAT_ENABLED => \&Nat_Enabled,
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NETBIOS_NS_HELPER => \&Netbios_ns_Helper,
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@ -172,7 +172,7 @@ sub process_one_masq1( $$$$$$$$$$ )
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#
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if ( $addresses ne '-' ) {
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if ( $addresses eq 'random' ) {
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fatal_error 'Invalid IPv6 address (random)' if $family == F_IPV6;
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require_capability( 'MASQUERADE_TGT', 'Masquerade rules', '') if $family == F_IPV6;
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$randomize = '--random ';
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} else {
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$addresses =~ s/:persistent$// and $persistent = ' --persistent ';
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@ -194,9 +194,11 @@ sub process_one_masq1( $$$$$$$$$$ )
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$detectaddress = 1;
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}
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} elsif ( $addresses eq 'NONAT' ) {
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fatal_error "'persistent' may not be specified with 'NONAT'" if $persistent;
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fatal_error "'random' may not be specified with 'NONAT'" if $randomize;
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$target = 'RETURN';
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$add_snat_aliases = 0;
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} else {
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} elsif ( $addresses ) {
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my $addrlist = '';
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my @addrs = split_list $addresses, 'address';
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@ -305,13 +307,15 @@ sub process_one_masq1( $$$$$$$$$$ )
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}
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$target .= $addrlist;
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} else {
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require_capability( 'MASQUERADE_TGT', 'Masquerade rules', '' ) if $family == F_IPV6;
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}
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}
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$target .= $randomize;
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$target .= $persistent;
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} else {
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fatal_error "IPv6 does does not support MASQUERADE -- you must use SNAT" if $family == F_IPV6;
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require_capability( 'MASQUERADE_TGT', 'Masquerade rules', '' ) if $family == F_IPV6;
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$add_snat_aliases = 0;
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}
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#
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@ -373,11 +377,9 @@ sub process_one_masq( )
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#
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sub setup_masq()
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{
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my $name = $family == F_IPV4 ? 'masq' : 'snat';
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if ( my $fn = open_file( 'masq', 1, 1 ) ) {
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if ( my $fn = open_file( $name, 1, 1 ) ) {
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first_entry( sub { progress_message2 "$doing $fn..."; require_capability 'NAT_ENABLED' , "a non-empty $name file" , 's'; } );
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first_entry( sub { progress_message2 "$doing $fn..."; require_capability 'NAT_ENABLED' , "a non-empty masq file" , 's'; } );
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process_one_masq while read_a_line( NORMAL_READ );
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}
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@ -1,10 +1,10 @@
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#
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# Shorewall6 version 4 - SNAT file
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# Shorewall6 version 4 - MASQUERADE/SNAT file
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#
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# For information about entries in this file, type "man shorewall6-snat"
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# For information about entries in this file, type "man shorewall6-masq"
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#
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# The manpage is also online at
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# http://www.shorewall.net/manpages6/shorewall6-snat.html
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# http://www.shorewall.net/manpages6/shorewall6-masq.html
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#
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########################################################################################################################
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#INTERFACE SOURCE ADDRESS PROTO PORT(S) IPSEC MARK USER/ SWITCH ORIGINAL
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@ -3,20 +3,20 @@
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"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
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<refentry>
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<refmeta>
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<refentrytitle>shorewall6-snat</refentrytitle>
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<refentrytitle>shorewall6-masq</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>snat</refname>
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<refname>masq</refname>
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<refpurpose>Shorewall6 SNAT definition file</refpurpose>
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<refpurpose>Shorewall6 Masquerade/SNAT definition file</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>/etc/shorewall6/snat</command>
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<command>/etc/shorewall6/masq</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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@ -26,11 +26,6 @@
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<para>Use this file to define Source NAT (SNAT). Requires Shorewall 4.5.14
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or later.</para>
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<note>
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<para>Unlike with IPv4, Netfilter does not support the MASQUERADE target
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with IPv6.</para>
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</note>
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<warning>
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<para>The entries in this file are order-sensitive. The first entry that
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matches a particular connection will be the one that is used.</para>
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@ -117,27 +112,32 @@
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">ADDRESS</emphasis> -
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{<emphasis>address-or-address-range</emphasis>[,<emphasis>address-or-address-range</emphasis>]...][:<emphasis>lowport</emphasis><emphasis
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<term><emphasis role="bold">ADDRESS</emphasis> (Optional) - [<emphasis
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role="bold">-</emphasis>|<emphasis
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role="bold">NONAT</emphasis>|[<emphasis>address-or-address-range</emphasis>[,<emphasis>address-or-address-range</emphasis>]...][:<emphasis>lowport</emphasis><emphasis
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role="bold">-</emphasis><emphasis>highport</emphasis>][<emphasis
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role="bold">:random</emphasis>][:persistent]|}</term>
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role="bold">:random</emphasis>][:persistent]|<emphasis
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role="bold">detect</emphasis>|<emphasis
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role="bold">random</emphasis>]</term>
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<listitem>
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<para>The address specified here will be used as the source address.
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If you simply wish to use the IPv6 address of the
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<replaceable>interface</replaceable> in the first column, enter the
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name of that interface preceded by an apersand ('&') - e.g.,
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&sit1.</para>
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<para>If you do not specify an address or address range,
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masquerading will be performed. This requires <firstterm>Masquerade
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Target</firstterm> support in your kernel and ip6tables.</para>
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<para>If you specify an address here, SNAT will be used and this
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will be the source address.</para>
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<para>You may also specify a range of up to 256 IP addresses if you
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want the SNAT address to be assigned from that range in a
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round-robin fashion by connection. The range is specified by
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<emphasis>first.ip.in.range</emphasis>-<emphasis>last.ip.in.range</emphasis>.
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The address or address range may be optionally followed by a port
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range. When this is done, you must enclose the IPv6 address(es) in
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square brackets. You may follow the port range with<emphasis
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role="bold"> :random</emphasis> in which case assignment of ports
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from the range will be random.</para>
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You may follow the port range with<emphasis
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role="bold">:random</emphasis> in which case assignment of ports
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from the list will be random. <emphasis
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role="bold">random</emphasis> may also be specified by itself in
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this column in which case random local port assignments are made for
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the outgoing connections.</para>
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<para>Example:
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[2001:470:a:227::2]-[2001:470:a:227::10]:1000-1010</para>
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@ -148,9 +148,6 @@
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address range is specified and causes a client to be given the same
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source/destination IP pair.</para>
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<para>Finally, you may also specify a comma-separated list of ranges
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and/or addresses in this column.</para>
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<para>This column may not contain DNS Names.</para>
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<para>Normally, Netfilter will attempt to retain the source port
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@ -502,7 +499,7 @@
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<para>Your entry in the file will be:</para>
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<programlisting> #INTERFACE SOURCE ADDRESS
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eth0 2001:470:b:787::0/64 &eth0</programlisting>
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eth0 2001:470:b:787::0/64 -</programlisting>
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</listitem>
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</varlistentry>
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</variablelist>
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@ -511,6 +508,6 @@
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<refsect1>
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<title>FILES</title>
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<para>/etc/shorewall6/snat</para>
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<para>/etc/shorewall6/masq</para>
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</refsect1>
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</refentry>
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