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https://gitlab.com/shorewall/code.git
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Add 'disconnect' option to ipset-based dynamic blacklisting
Signed-off-by: Tom Eastep <teastep@shorewall.net>
This commit is contained in:
Tom Eastep
parent
6ad7d47eb6
commit
8d731c81e4
@ -3555,10 +3555,34 @@ blacklist_command() {
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;;
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esac
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$IPSET -A $g_blacklistipset $@ && progress_message2 "$1 Blacklisted" || { error_message "ERROR: Address $1 not blacklisted"; return 1; }
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if $IPSET -A $g_blacklistipset $@ -exist; then
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local message
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progress_message2 "$1 Blacklisted"
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if [ -n "g_disconnect" ]; then
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message=$(conntrack -D -s $1 2>&1)
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if [ -n "$message" ]; then
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message=$(echo $message | sed 's/^.*: //; s/ / src /')
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progress_message2 $message
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fi
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if [ $g_disconnect = src-dst ]; then
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message=$(conntrack -D -d $1 2>&1)
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if [ -n "$message" ]; then
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message=$(echo $message | sed 's/^.*: //; s/ / dst /')
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progress_message2 $message
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fi
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fi
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fi
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else
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error_message "ERROR: Address $1 not blacklisted"
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return 1
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fi
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return 0
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}
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save_command() {
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local finished
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finished=0
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@ -3761,6 +3785,59 @@ verify_firewall_script() {
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fi
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}
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setup_dbl() {
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local original
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original=$DYNAMIC_BLACKLIST
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case $DYNAMIC_BLACKLIST in
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*:*,)
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fatal_error "Invalid value ($original) for DYNAMIC_BLACKLIST"
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;;
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ipset*,disconnect*)
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if qt mywhich conntrack; then
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g_disconnect=src
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DYNAMIC_BLACKLIST=$(echo $DYNAMIC_BLACKLIST | sed 's/,disconnect//')
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else
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fatal_error "The 'disconnect' option requires that the conntrack utility be installed"
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fi
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;;
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esac
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case $DYNAMIC_BLACKLIST in
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ipset*,src-dst*)
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#
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# This utility doesn't need to know about 'src-dst'
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#
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DYNAMIC_BLACKLIST=$(echo $DYNAMIC_BLACKLIST | sed 's/,src-dst//')
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[ -n "$g_disconnect" ] && g_disconnect=src-dst
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;;
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esac
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case $DYNAMIC_BLACKLIST in
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[Nn]o)
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DYNAMIC_BLACKLIST='';
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;;
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[Yy]es)
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;;
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ipset|ipset::*|ipset-only|ipset-only::*)
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g_blacklistipset=SW_DBL$g_family
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;;
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ipset:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset-only:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset-only:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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*)
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fatal_error "Invalid value ($original) for DYNAMIC_BLACKLIST"
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;;
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esac
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}
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################################################################################
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# The remaining functions are used by the Lite cli - they are overloaded by
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# the Standard CLI by loading lib.cli-std
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@ -3920,35 +3997,7 @@ get_config() {
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fi
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if [ -n "$DYNAMIC_BLACKLIST" ]; then
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case $DYNAMIC_BLACKLIST in
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[Nn]o)
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DYNAMIC_BLACKLIST='';
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;;
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[Yy]es)
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;;
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ipset|ipset::*|ipset-only|ipset-only::*|ipset,src-dst|ipset-only,src-dst::*)
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g_blacklistipset=SW_DBL$g_family
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;;
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ipset:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset,src-dst:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset,src-dst:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset-only:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset-only:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset-only,src-dst:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset-only,src-dst:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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*)
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fatal_error "Invalid value ($DYNAMIC_BLACKLIST) for DYNAMIC_BLACKLIST"
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;;
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esac
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setup_dbl
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fi
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lib=$(find_file lib.cli-user)
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@ -4294,6 +4343,7 @@ shorewall_cli() {
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g_compiled=
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g_pager=
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g_blacklistipset=
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g_disconnect=
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VERBOSE=
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VERBOSITY=1
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@ -6253,9 +6253,17 @@ sub get_configuration( $$$$ ) {
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if ( supplied( $val = $config{DYNAMIC_BLACKLIST} ) ) {
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if ( $val =~ /^ipset/ ) {
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my %valid_options = ( 'src-dst' => 1, 'disconnect' => 1 );
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my ( $key, $set, $level, $tag, $rest ) = split( ':', $val , 5 );
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fatal_error "Invalid DYNAMIC_BLACKLIST setting ( $val )" if $key !~ /^ipset(?:-only)?(?:,src-dst)?$/ || defined $rest;
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( $key, my @options ) = split_list( $key, 'option' );
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for ( @options ) {
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fatal_error "Invalid ipset option ($_)" unless $valid_options{$_};
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}
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fatal_error "Invalid DYNAMIC_BLACKLIST setting ( $val )" if $key !~ /^ipset(?:-only)?$/ || defined $rest;
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if ( supplied( $set ) ) {
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fatal_error "Invalid DYNAMIC_BLACKLIST ipset name" unless $set =~ /^[A-Za-z][\w-]*/;
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@ -336,35 +336,7 @@ get_config() {
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fi
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if [ -n "$DYNAMIC_BLACKLIST" ]; then
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case $DYNAMIC_BLACKLIST in
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[Nn]o)
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DYNAMIC_BLACKLIST='';
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;;
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[Yy]es)
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;;
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ipset|ipset::*|ipset-only|ipset-only::*|ipset,src-dst|ipset-only,src-dst::*)
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g_blacklistipset=SW_DBL$g_family
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;;
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ipset:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset,src-dst:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset,src-dst:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset-only:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset-only:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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ipset-only,src-dst:[a-zA-Z]*)
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g_blacklistipset=${DYNAMIC_BLACKLIST#ipset-only,src-dst:}
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g_blacklistipset=${g_blacklistipset%%:*}
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;;
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*)
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fatal_error "Invalid value ($DYNAMIC_BLACKLIST) for DYNAMIC_BLACKLIST"
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;;
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esac
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setup_dbl
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fi
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lib=$(find_file lib.cli-user)
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@ -485,7 +485,7 @@
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<para>ALL sends all packets through the blacklist chains.</para>
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<para>Note: The ESTABLISHED state may not be specified if
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FASTACCEPT=Yes is specified.</para>
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FASTACCEPT=Yes is specified. </para>
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</listitem>
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</varlistentry>
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@ -769,7 +769,8 @@
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role="bold">No</emphasis>||<emphasis
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role="bold">ipset</emphasis>[<emphasis
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role="bold">-only</emphasis>][,<emphasis
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role="bold">src-dst</emphasis>][:[<replaceable>setname</replaceable>][:<replaceable>log_level</replaceable>|:l<replaceable>og_tag</replaceable>]]]}</term>
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role="bold">src-dst</emphasis>][,<emphasis
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role="bold">disconnect</emphasis>][:[<replaceable>setname</replaceable>][:<replaceable>log_level</replaceable>|:l<replaceable>og_tag</replaceable>]]]}</term>
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<listitem>
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<para>Added in Shorewall 4.4.7. When set to <emphasis
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@ -792,6 +793,14 @@
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<option>src-dst</option> is included, then packets whose destination
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address matches an entry in the ipset are also dropped.</para>
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<para>The <option>disconnect</option> option was added in Shorewall
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5.0.13 and requires that the conntrack utility be installed on the
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firewall system. When an address is blacklisted using the
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<command>blacklist</command> command, all connections originating
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from that address are disconnected. if the <option>src-dst</option>
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option was also specified, then all connections to that address are
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also disconnected.</para>
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<para>When ipset-based dynamic blacklisting is enabled, the contents
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of the blacklist will be preserved over
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<command>stop</command>/<command>reboot</command>/<command>start</command>
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@ -630,7 +630,8 @@
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role="bold">No</emphasis>||<emphasis
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role="bold">ipset</emphasis>[<emphasis
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role="bold">-only</emphasis>][,<emphasis
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role="bold">src-dst</emphasis>][:[<replaceable>setname</replaceable>][:<replaceable>log_level</replaceable>|:l<replaceable>og_tag</replaceable>]]]}</term>
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role="bold">src-dst</emphasis>][,<emphasis
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role="bold">disconnect</emphasis>][:[<replaceable>setname</replaceable>][:<replaceable>log_level</replaceable>|:l<replaceable>og_tag</replaceable>]]]}</term>
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<listitem>
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<para>Added in Shorewall 4.4.7. When set to <emphasis
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@ -653,6 +654,14 @@
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<option>src-dst</option> is included, then packets whose destination
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address matches an entry in the ipset are also dropped.</para>
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<para>The <option>disconnect</option> option was added in Shorewall
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5.0.13 and requires that the conntrack utility be installed on the
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firewall system. When an address is blacklisted using the
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<command>blacklist</command> command, all connections originating
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from that address are disconnected. if the <option>src-dst</option>
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option was also specified, then all connections to that address are
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also disconnected.</para>
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<para>When ipset-based dynamic blacklisting is enabled, the contents
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of the blacklist will be preserved over
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<command>stop</command>/<command>reboot</command>/<command>start</command>
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