From 97edb2dd92bb48ec85cdd082da1af1ef7235d644 Mon Sep 17 00:00:00 2001
From: Olivier Blin <oblin@mandriva.org>
Date: Thu, 1 Sep 2005 19:50:59 +0000
Subject: install and configure Interface Firewall in drakfirewall

---
 perl-install/network/drakfirewall.pm | 69 ++++++++++++++++++++++++++++++++++--
 perl-install/network/shorewall.pm    | 23 ++++++------
 2 files changed, 78 insertions(+), 14 deletions(-)

(limited to 'perl-install/network')

diff --git a/perl-install/network/drakfirewall.pm b/perl-install/network/drakfirewall.pm
index 9e9367369..eef489801 100644
--- a/perl-install/network/drakfirewall.pm
+++ b/perl-install/network/drakfirewall.pm
@@ -69,6 +69,13 @@ my @all_servers =
   },
 );
 
+my @ifw_rules = (
+    {
+        name => N_("Port scan detection"),
+        ifw_rule => 'psd',
+    },
+);
+
 sub port2server {
     my ($port) = @_;
     find {
@@ -170,7 +177,7 @@ drakconnect before going any further."), 1) or return;
     }
 }
 
-sub choose {
+sub choose_allowed_services {
     my ($in, $disabled, $servers, $unlisted) = @_;
 
     $_->{on} = 0 foreach @all_servers;
@@ -202,7 +209,60 @@ You can also give a range of ports (eg: 24300:24350/udp)", $invalid_port));
 		   { label => N("Other ports"), val => \$unlisted, advanced => 1, disabled => sub { $disabled } }
 		  ]) or return;
 
-    $disabled, to_ports([ grep { $_->{on} } @l ], $unlisted);
+    $disabled, [ grep { $_->{on} } @l ], $unlisted;
+}
+
+sub set_ifw {
+    my ($do_pkgs, $enabled, $rules, $ports) = @_;
+    $do_pkgs->ensure_is_installed('mandi-ifw', '/etc/ifw/start', $::isInstall) or return;
+
+    my $ports_by_proto = network::shorewall::ports_by_proto($ports);
+    output_with_perm("$::prefix/etc/ifw/rules", 0644, map { "$_\n" } (
+        (map { "source /etc/ifw/rules.d/$_" } @$rules),
+        map {
+            my $proto = $_;
+            map {
+                my $multiport = /:/ && " -m multiport";
+                "iptables -A Ifw -m state --state NEW -p $proto$multiport --dport $_ -j IFWLOG --log-prefix NEW\n";
+            } @{$ports_by_proto->{$proto}};
+        } keys %$ports_by_proto,
+    ));
+
+    my $set_in_file = sub {
+        my ($file, @list) = @_;
+        substInFile {
+            foreach my $l (@list) { s|^$l\n|| }
+            $_ .= join("\n", @list) . "\n" if eof && $enabled;
+        } "$::prefix/etc/shorewall/$file";
+    };
+    $set_in_file->('start', "INCLUDE /etc/ifw/start", "INCLUDE /etc/ifw/rules", "iptables -I INPUT 2 -j Ifw");
+    $set_in_file->('stop', "iptables -D INPUT -j Ifw", "INCLUDE /etc/ifw/stop");
+}
+
+sub choose_watched_services {
+    my ($in, $servers, $unlisted) = @_;
+
+    my @l = (@ifw_rules, @$servers, map { { ports => $_ } } split(' ', $unlisted));
+    my $enabled = 1;
+    $_->{ifw} = 1 foreach @l;
+
+    $in->ask_from_({
+        messages =>
+          N("Interactive Firewall") . "\n\n" .
+          N("You can be warned when someone access to a service or tries to intrude into your computer.
+Please select which network activity should be watched."),
+        title => N("Interactive Firewall"),
+    },
+                   [
+                       { text => N("Use Interactive Firewall"), val => \$enabled, type => 'bool' },
+                       map { my $e = $_; {
+                           text => (exists $_->{name} ? translate($_->{name}) : $_->{ports}),
+                           val => \$_->{ifw},
+                           type => 'bool', disabled => sub { !member($e, @ifw_rules) || !$enabled },
+                       } } @l,
+                   ]) or return;
+    my ($rules, $ports) = partition { exists $_->{ifw_rule} } grep { $_->{ifw} } @l;
+    set_ifw($in->do_pkgs, $enabled, [ map { $_->{ifw_rule} } @$rules ], to_ports($ports));
 }
 
 sub main {
@@ -210,8 +270,11 @@ sub main {
 
     ($disabled, my $servers, my $unlisted) = get_conf($in, $disabled) or return;
 
-    ($disabled, my $ports) = choose($in, $disabled, $servers, $unlisted) or return;
+    ($disabled, $servers, $unlisted) = choose_allowed_services($in, $disabled, $servers, $unlisted) or return;
+
+    choose_watched_services($in, $servers, $unlisted) unless $disabled;
 
+    my $ports = to_ports($servers, $unlisted);
     set_ports($in->do_pkgs, $disabled, $ports, $in) or return;
 
     ($disabled, $ports);
diff --git a/perl-install/network/shorewall.pm b/perl-install/network/shorewall.pm
index 7e5d97363..463d64a62 100644
--- a/perl-install/network/shorewall.pm
+++ b/perl-install/network/shorewall.pm
@@ -1,8 +1,5 @@
 package network::shorewall; # $Id$
 
-
-
-
 use detect_devices;
 use network::ethernet;
 use network::network;
@@ -10,7 +7,6 @@ use run_program;
 use common;
 use log;
 
-
 sub check_iptables() {
     -f "$::prefix/etc/sysconfig/iptables" ||
     $::isStandalone && do {
@@ -101,16 +97,21 @@ sub read {
     $conf{net_interface} && \%conf;
 }
 
+sub ports_by_proto {
+    my ($ports) = @_;
+    my %ports_by_proto;
+    foreach (split ' ', $ports) {
+	m!^(\d+(?:\d+)?)/(udp|tcp|icmp)$! or die "bad port $_\n";
+	push @{$ports_by_proto{$2}}, $1;
+    }
+    \%ports_by_proto;
+}
+
 sub write {
     my ($conf) = @_;
     my $default_intf = get_ifcfg_interface();
     my $use_pptp = $default_intf =~ /^ppp/ && cat_("$::prefix/etc/ppp/peers/$default_intf") =~ /pptp/;
-
-    my %ports_by_proto;
-    foreach (split ' ', $conf->{ports}) {
-	m!^(\d+(:\d+)?)/(udp|tcp|icmp)$! or die "bad port $_\n";
-	push @{$ports_by_proto{$3}}, $1;
-    }
+    my $ports_by_proto = ports_by_proto($conf->{ports});
 
     my $interface_settings = sub {
         my ($zone, $interface) = @_;
@@ -134,7 +135,7 @@ sub write {
     set_config_file('rules',
     		    if_($use_pptp, [ 'ACCEPT', 'fw', 'loc:10.0.0.138', 'tcp', '1723' ]),
 		    if_($use_pptp, [ 'ACCEPT', 'fw', 'loc:10.0.0.138', 'gre' ]),
-		    (map_each { [ 'ACCEPT', 'net', 'fw', $::a, join(',', @$::b), '-' ] } %ports_by_proto),
+		    (map_each { [ 'ACCEPT', 'net', 'fw', $::a, join(',', @$::b), '-' ] } %$ports_by_proto),
 		    (map {
 			map_each { [ 'REDIRECT', 'loc', $::a, $_, $::b, '-' ] } %{$conf->{redirects}{$_}};
 		    } keys %{$conf->{redirects}}),
-- 
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