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Implement whitelisting.
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
8ec33cd6dd
commit
e940f5018e
@ -247,9 +247,19 @@ sub setup_blacklist() {
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$options = 'src' if $options eq '-';
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my ( $to, $from ) = ( 0, 0 );
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my ( $to, $from, $whitelist ) = ( 0, 0, 0 );
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for ( split /,/, $options ) {
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my @options = split_list $options, 'option';
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for ( @options ) {
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$whitelist++ if $_ eq 'whitelist';
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}
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warning_message "Duplicate 'whitelist' option ignored" if $whitelist > 1;
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my $tgt = $whitelist ? 'RETURN' : $target;
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for ( @options ) {
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if ( $_ =~ /^(?:from|src)$/ ) {
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if ( $from++ ) {
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warning_message "Duplicate 'src' ignored";
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@ -262,9 +272,9 @@ sub setup_blacklist() {
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$networks,
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'',
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'' ,
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$target ,
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$tgt ,
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'' ,
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$target ,
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$tgt ,
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'' );
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} else {
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warning_message '"src" entry ignored because there are no "blacklist in" zones';
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@ -282,15 +292,15 @@ sub setup_blacklist() {
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'',
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$networks,
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'' ,
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$target ,
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$tgt ,
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'' ,
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$target ,
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$tgt ,
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'' );
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} else {
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warning_message '"dst" entry ignored because there are no "blacklist out" zones';
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}
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}
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} else {
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} elsif ( $_ ne 'whitelist' ) {
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fatal_error "Invalid blacklist option($_)";
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}
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}
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@ -8,6 +8,8 @@ Changes in Shorewall 4.4.20 Beta 2
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4) Implemented NFLOG accounting action.
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5) Implement 'whitelist' option.
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Changes in Shorewall 4.4.20 Beta 1
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1) Apply Togan's patch for installation flexibility.
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@ -51,7 +51,12 @@ All bug fixes from 4.4.19.1 - 4.4.19.4.
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3) An NFLOG 'ACTION' has been added to the accounting file to allow
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sending matching packets (or the leading part of them) to backend
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accounting daemons via a netlink socket.
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accounting daemons via a netlink socket.
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4) A 'whitelist' option has been added to the blacklist file. When
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'whitelist' is specified, packets/connections matching the entry
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are not matched against the entries which follow. No logging of
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whitelisted packets/connections is performed.
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----------------------------------------------------------------------------
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I V. R E L E A S E 4 . 4 H I G H L I G H T S
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@ -124,7 +124,7 @@
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<row>
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<entry><ulink
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url="blacklisting_support.htm">Blacklisting</ulink></entry>
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url="blacklisting_support.htm">Blacklisting/Whitelisting</ulink></entry>
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<entry><ulink
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url="two-interface.htm#SNAT">Masquerading</ulink></entry>
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@ -265,8 +265,8 @@
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<entry><ulink url="two-interface.htm#DNAT">Port
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Forwarding</ulink></entry>
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<entry><ulink url="whitelisting_under_shorewall.htm">White List
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Creation</ulink></entry>
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<entry><ulink url="blacklisting_support.htm#whitelisting">White
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List Creation</ulink></entry>
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</row>
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<row>
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@ -5,7 +5,7 @@
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<!--$Id$-->
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<articleinfo>
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<title>Shorewall Blacklisting Support</title>
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<title>Shorewall Blacklisting/Whitelisting Support</title>
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<authorgroup>
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<author>
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@ -22,6 +22,8 @@
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<year>2010</year>
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<year>2011</year>
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<holder>Thomas M. Eastep</holder>
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</copyright>
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@ -66,10 +68,10 @@
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</orderedlist>
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<important>
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<para><emphasis role="bold">Only the source address is checked against
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the blacklists</emphasis>. Blacklists only stop blacklisted hosts from
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connecting to you — they do not stop you or your users from connecting
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to blacklisted hosts .</para>
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<para><emphasis role="bold">By default, only the source address is
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checked against the blacklists</emphasis>. Blacklists only stop
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blacklisted hosts from connecting to you — they do not stop you or your
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users from connecting to blacklisted hosts .</para>
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<variablelist>
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<varlistentry>
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@ -106,36 +108,31 @@
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<listitem>
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<para>You specify whether you want packets from blacklisted hosts
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dropped or rejected using the BLACKLIST_DISPOSITION setting in <ulink
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url="manpages/shorewall.conf.html"><filename>/etc/shorewall/shorewall.conf</filename>.</ulink></para>
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url="manpages/shorewall.conf.html"><filename>shorewall.conf</filename>(5).</ulink></para>
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</listitem>
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<listitem>
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<para>You specify whether you want packets from blacklisted hosts
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logged and at what syslog level using the BLACKLIST_LOGLEVEL setting
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in <ulink
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url="manpages/shorewall.conf.html"><filename>/etc/shorewall/shorewall.conf</filename></ulink>.</para>
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url="manpages/shorewall.conf.html"><filename>shorewall.conf</filename></ulink>(5).</para>
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</listitem>
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<listitem>
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<para>You list the IP addresses/subnets that you wish to blacklist in
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<ulink
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url="manpages/shorewall-blacklist.html"><filename>/etc/shorewall/blacklist</filename></ulink>.
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You may also specify PROTOCOL and Port numbers/Service names in the
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blacklist file.</para>
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url="manpages/shorewall-blacklist.html"><filename>shorewall-blacklist</filename></ulink>
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(5). You may also specify PROTOCOL and Port numbers/Service names in
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the blacklist file.</para>
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</listitem>
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<listitem>
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<para>You specify the interfaces whose incoming packets you want
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checked against the blacklist using the <quote>blacklist</quote>
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option in <ulink
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url="manpages/shorewall-interfaces.html"><filename>/etc/shorewall/interfaces</filename></ulink>.</para>
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</listitem>
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<listitem>
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<para>The black list is refreshed from
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<filename>/etc/shorewall/blacklist</filename> by the <quote><ulink
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url="starting_and_stopping_shorewall.htm"><command>shorewall
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refresh</command></ulink></quote> command.</para>
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url="manpages/shorewall-interfaces.html"><filename>shorewall-interfaces</filename></ulink>(5)
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(<ulink url="manpages/shorewall-zones.html">shorewall-zones</ulink>(5)
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in Shorewall 4.4.12 and later).</para>
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</listitem>
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</itemizedlist>
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@ -176,6 +173,19 @@ ipset -B Blacklist 206.124.146.177 -b SMTP</programlisting>
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<para>This will blacklist SMTP traffic from host 206.124.146.177.</para>
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</section>
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<section id="whitelisting">
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<title>Static Whitelisting</title>
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<para>Beginning with Shorewall 4.4.20, you can create
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<firstterm>whitelist</firstterm> entries in the blacklist file.
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Connections/packets matching a whitelist entry are not matched against the
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entries in the blacklist file that follow. Whitelist entries are created
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using the <emphasis role="bold">whitelist</emphasis> option (OPTIONS
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column). See <ulink
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url="manpages/shorewall-blacklist.html"><filename>shorewall-blacklist</filename></ulink>
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(5).</para>
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</section>
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<section id="Dynamic">
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<title>Dynamic Blacklisting</title>
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@ -78,7 +78,7 @@
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<varlistentry>
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<term>OPTIONS (Optional - Added in 4.4.12) -
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{-|{dst|src}[,...]}</term>
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{-|{dst|src|whitelist}[,...]}</term>
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<listitem>
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<para>If specified, indicates whether traffic
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@ -122,6 +122,12 @@
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</listitem>
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</orderedlist>
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</note>
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<para>In Shorewall 4.4.20, the <emphasis
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role="bold">whitelist</emphasis> option was added. When <emphasis
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role="bold">whitelist</emphasis> is specified, packets/connections
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that match the entry are not matched against the remaining entries
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in the file.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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@ -78,7 +78,7 @@
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<varlistentry>
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<term>OPTIONS (Optional - Added in 4.4.12) -
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{-|{dst|src}[,...]}</term>
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{-|{dst|src|whitelist}[,...]}</term>
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<listitem>
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<para>If specified, indicates whether traffic
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@ -122,6 +122,12 @@
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</listitem>
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</orderedlist>
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</note>
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<para>In Shorewall 4.4.20, the <emphasis
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role="bold">whitelist</emphasis> option was added. When <emphasis
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role="bold">whitelist</emphasis> is specified, packets/connections
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that match the entry are not matched against the remaining entries
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in the file.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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