###############################################################################
# #
# IPFire.org - A linux based firewall #
-# Copyright (C) 2013 Alexander Marx <amarx@ipfire.org> #
+# Copyright (C) 2007-2020 IPFire Team <info@ipfire.org> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
###############################################################################
use strict;
+use experimental 'smartmatch';
require '/var/ipfire/general-functions.pl';
require "${General::swroot}/lang.pl";
require "/usr/lib/firewall/firewall-lib.pl";
+require "${General::swroot}/location-functions.pl";
# Set to one to enable debugging mode.
my $DEBUG = 0;
my @VALID_TARGETS = ("ACCEPT", "DROP", "REJECT");
+my @PRIVATE_NETWORKS = (
+ "10.0.0.0/8",
+ "172.16.0.0/12",
+ "192.168.0.0/16",
+ "100.64.0.0/10",
+);
+
my %fwdfwsettings=();
my %fwoptions = ();
my %defaultNetworks=();
my %configinputfw=();
my %configoutgoingfw=();
my %confignatfw=();
+my %locationsettings = (
+ "LOCATIONBLOCK_ENABLED" => "off"
+);
+
my @p2ps=();
my $configfwdfw = "${General::swroot}/firewall/config";
my $configinput = "${General::swroot}/firewall/input";
my $configoutgoing = "${General::swroot}/firewall/outgoing";
my $p2pfile = "${General::swroot}/firewall/p2protocols";
-my $geoipfile = "${General::swroot}/firewall/geoipblock";
+my $locationfile = "${General::swroot}/firewall/locationblock";
my $configgrp = "${General::swroot}/fwhosts/customgroups";
my $netsettings = "${General::swroot}/ethernet/settings";
&General::readhasharray($configoutgoing, \%configoutgoingfw);
&General::readhasharray($configgrp, \%customgrp);
+# Check if the location settings file exists
+if (-e "$locationfile") {
+ # Read settings file
+ &General::readhash("$locationfile", \%locationsettings);
+}
+
+# Get all available locations.
+my @locations = &Location::Functions::get_locations();
+
my @log_limit_options = &make_log_limit_options();
my $POLICY_INPUT_ALLOWED = 0;
# Load P2P block rules.
&p2pblock();
- # Load GeoIP block rules.
- &geoipblock();
+ # Load Location block rules.
+ &locationblock();
# Reload firewall policy.
run("/usr/sbin/firewall-policy");
}
if ($POLICY_INPUT_ACTION eq "DROP") {
- push(@special_input_targets, "REJECT");
+ push(@special_input_targets, ("ACCEPT", "REJECT"));
} elsif ($POLICY_INPUT_ACTION eq "REJECT") {
- push(@special_input_targets, "DROP");
+ push(@special_input_targets, ("ACCEPT", "DROP"));
}
my @special_output_targets = ();
push(@special_output_targets, "ACCEPT");
if ($POLICY_OUTPUT_ACTION eq "DROP") {
- push(@special_output_targets, "REJECT");
+ push(@special_output_targets, ("ACCEPT", "REJECT"));
} elsif ($POLICY_OUTPUT_ACTION eq "REJECT") {
- push(@special_output_targets, "DROP");
+ push(@special_output_targets, ("ACCEPT", "DROP"));
}
}
push(@destination_options, ("-d", $destination));
}
+ # Add source and destination interface to the filter rules.
+ # These are supposed to help filtering forged packets that originate
+ # from BLUE with an IP address from GREEN for instance.
+ my @source_intf_options = ();
+ if ($source_intf) {
+ push(@source_intf_options, ("-i", $source_intf));
+ }
+
+ my @destination_intf_options = ();
+ if ($destination_intf) {
+ push(@destination_intf_options, ("-o", $destination_intf));
+ }
+
# Add time constraint options.
push(@options, @time_options);
# Source NAT
} elsif ($NAT_MODE eq "SNAT") {
+ my @snat_options = ( "-m", "policy", "--dir", "out", "--pol", "none" );
my @nat_options = @options;
+ # Get addresses for the configured firewall interfaces.
+ my @local_addresses = &fwlib::get_internal_firewall_ip_addresses(1);
+
+ # Check if the nat_address is one of the local addresses.
+ foreach my $local_address (@local_addresses) {
+ if ($nat_address eq $local_address) {
+ # Clear SNAT options.
+ @snat_options = ();
+
+ # Finish loop.
+ last;
+ }
+ }
+
+ push(@nat_options, @destination_intf_options);
push(@nat_options, @source_options);
push(@nat_options, @destination_options);
if ($LOG) {
- run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options @log_limit_options -j LOG --log-prefix 'SNAT '");
+ run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options @snat_options @log_limit_options -j LOG --log-prefix 'SNAT '");
}
- run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options -j SNAT --to-source $nat_address");
+ run("$IPTABLES -t nat -A $CHAIN_NAT_SOURCE @nat_options @snat_options -j SNAT --to-source $nat_address");
}
}
- # Add source and destination interface to the filter rules.
- # These are supposed to help filtering forged packets that originate
- # from BLUE with an IP address from GREEN for instance.
- if ($source_intf) {
- push(@source_options, ("-i", $source_intf));
- }
-
- if ($destination_intf) {
- push(@destination_options, ("-o", $destination_intf));
- }
-
push(@options, @source_options);
push(@options, @destination_options);
# Insert firewall rule.
- if ($LOG && !$NAT) {
- run("$IPTABLES -A $chain @options @log_limit_options -j LOG --log-prefix '$chain '");
+ if ($LOG) {
+ run("$IPTABLES -A $chain @options @source_intf_options @destination_intf_options @log_limit_options -j LOG --log-prefix '$chain '");
}
- run("$IPTABLES -A $chain @options -j $target");
+ run("$IPTABLES -A $chain @options @source_intf_options @destination_intf_options -j $target");
# Handle forwarding rules and add corresponding rules for firewall access.
if ($chain eq $CHAIN_FORWARD) {
# is granted/forbidden for any network that the firewall itself is part of, we grant/forbid access
# for the firewall, too.
if ($firewall_is_in_destination_subnet && ($target ~~ @special_input_targets)) {
- if ($LOG && !$NAT) {
- run("$IPTABLES -A $CHAIN_INPUT @options @log_limit_options -j LOG --log-prefix '$CHAIN_INPUT '");
+ if ($LOG) {
+ run("$IPTABLES -A $CHAIN_INPUT @options @source_intf_options @log_limit_options -j LOG --log-prefix '$CHAIN_INPUT '");
}
- run("$IPTABLES -A $CHAIN_INPUT @options -j $target");
+ run("$IPTABLES -A $CHAIN_INPUT @options @source_intf_options -j $target");
}
# Likewise.
if ($firewall_is_in_source_subnet && ($target ~~ @special_output_targets)) {
- if ($LOG && !$NAT) {
- run("$IPTABLES -A $CHAIN_OUTPUT @options @log_limit_options -j LOG --log-prefix '$CHAIN_OUTPUT '");
+ if ($LOG) {
+ run("$IPTABLES -A $CHAIN_OUTPUT @options @destination_intf_options @log_limit_options -j LOG --log-prefix '$CHAIN_OUTPUT '");
}
- run("$IPTABLES -A $CHAIN_OUTPUT @options -j $target");
+ run("$IPTABLES -A $CHAIN_OUTPUT @options @destination_intf_options -j $target");
}
}
}
}
}
-sub geoipblock {
- my %geoipsettings = ();
- $geoipsettings{'GEOIPBLOCK_ENABLED'} = "off";
-
+sub locationblock {
# Flush iptables chain.
- run("$IPTABLES -F GEOIPBLOCK");
+ run("$IPTABLES -F LOCATIONBLOCK");
- # Check if the geoip settings file exists
- if (-e "$geoipfile") {
- # Read settings file
- &General::readhash("$geoipfile", \%geoipsettings);
- }
-
- # If geoip blocking is not enabled, we are finished here.
- if ($geoipsettings{'GEOIPBLOCK_ENABLED'} ne "on") {
+ # If location blocking is not enabled, we are finished here.
+ if ($locationsettings{'LOCATIONBLOCK_ENABLED'} ne "on") {
# Exit submodule. Process remaining script.
return;
}
- # Get supported locations.
- my @locations = &fwlib::get_geoip_locations();
+ # Only check the RED interface, which is ppp0 in case of RED_TYPE being
+ # set to "PPPOE", and red0 in case of RED_TYPE not being empty otherwise.
+ if ($defaultNetworks{'RED_TYPE'} eq "PPPOE") {
+ run("$IPTABLES -A LOCATIONBLOCK ! -i ppp0 -j RETURN");
+ } elsif ($defaultNetworks{'RED_DEV'} ne "") {
+ run("$IPTABLES -A LOCATIONBLOCK ! -i $defaultNetworks{'RED_DEV'} -j RETURN");
+ }
+
+ # Do not check any private address space
+ foreach my $network (@PRIVATE_NETWORKS) {
+ run("$IPTABLES -A LOCATIONBLOCK -s $network -j RETURN");
+ }
- # Loop through all supported geoip locations and
- # create iptables rules, if blocking this country
+ # Loop through all supported locations and
+ # create iptables rules, if blocking for this country
# is enabled.
foreach my $location (@locations) {
- if($geoipsettings{$location} eq "on") {
- run("$IPTABLES -A GEOIPBLOCK -m geoip --src-cc $location -j DROP");
+ if(exists $locationsettings{$location} && $locationsettings{$location} eq "on") {
+ run("$IPTABLES -A LOCATIONBLOCK -m geoip --src-cc $location -j DROP");
}
}
}
# Maybe we should get this from the configuration.
my $limit = 10;
- # We limit log messages to $limit messages per minute.
- push(@options, ("--limit", "$limit/min"));
+ # We limit log messages to $limit messages per second.
+ push(@options, ("--limit", "$limit/second"));
# And we allow bursts of 2x $limit.
push(@options, ("--limit-burst", $limit * 2));
projects / ipfire-2.x.git / blobdiff