1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
package network::shorewall; # $Id$
use diagnostics;
use strict;
use detect_devices;
use network::netconnect;
use common;
use log;
my @drakgw_ports = qw(domain bootps);
sub check_iptables {
my ($in) = @_;
my $existing_config = -f "$::prefix/etc/sysconfig/iptables";
$existing_config ||= $::isStandalone && do {
system('modprobe iptable_nat');
-x '/sbin/iptables' && listlength(`/sbin/iptables -t nat -nL`) > 8;
};
!$existing_config || $in->ask_okcancel(_("Firewalling configuration detected!"),
_("Warning! An existing firewalling configuration has been detected. You may need some manual fix after installation."));
}
sub set_config_file {
my ($file, @l) = @_;
my $done;
substInFile {
if (!$done && (/^#LAST LINE/ || eof)) {
$_ = join('', map { join("\t", @$_) . "\n" } @l) . $_;
$done = 1;
} else {
$_ = '' if /^[^#]/;
}
} "/etc/shorewall/$file";
}
sub get_config_file {
my ($file) = @_;
map { [ split ' ' ] } grep { !/^#/ } cat_("/etc/shorewall/$file");
}
sub default_interfaces {
my %conf;
my @l = detect_devices::getNet() or return;
if (@l == 1) {
$conf{net_interface} = $l[0];
$conf{loc_interface} = [ 'lo0' ];
} else {
$conf{net_interface} = network::netconnect::get_net_device() or return;
$conf{loc_interface} = [ grep { $_ ne $conf{net_interface} } @l ];
}
\%conf;
}
sub read {
my %conf;
$conf{disabled} = !glob_("$::prefix/etc/rc3.d/S*shorewall");
$conf{ports} =
join(' ', map {
my $e = $_;
map { "$_/$e->[3]" } split(',', $e->[4]);
} grep { $_->[0] eq 'ACCEPT' && $_->[1] eq 'net' } get_config_file('rules'));
if (my ($e) = get_config_file('masq')) {
$conf{masquerade}{subnet} = $e->[1] if $e->[1];
}
foreach (get_config_file('interfaces')) {
my ($name, $interface) = @$_;
if ($name eq 'net') {
$conf{net_interface} = $interface;
} elsif ($name eq 'masq') {
$conf{masquerade}{interface} = $interface;
} elsif ($name eq 'loc') {
push @{$conf{loc_interface}}, $interface;
} else {
log::l("unknown interface name $name");
}
}
$conf{net_interface} && \%conf;
}
sub write {
my ($conf) = @_;
my %ports_by_proto;
foreach (split ' ', $conf->{ports}) {
m!^(\d+)/(udp|tcp)$! or die "bad port $_\n";
push @{$ports_by_proto{$2}}, $1;
}
set_config_file("zones",
[ 'net', 'Net', 'Internet zone' ],
if_($conf->{masquerade}, [ 'masq', 'Masquerade', 'Masquerade Local' ]),
if_($conf->{loc_interface}, [ 'loc', 'Local', 'Local' ]),
);
set_config_file('interfaces',
[ 'net', $conf->{net_interface}, 'detect' ],
$conf->{masquerade} ? [ 'masq', $conf->{masquerade}{interface}, 'detect' ] : (),
(map { [ 'loc', $_, 'detect' ] } @{$conf->{loc_interface} || []}),
);
set_config_file('policy',
if_($conf->{masquerade}, [ 'masq', 'net', 'ACCEPT' ]),
if_($conf->{loc_interface}, [ 'loc', 'net', 'ACCEPT' ]),
[ 'fw', 'net', 'ACCEPT' ],
[ 'net', 'all', 'DROP', 'info' ],
[ 'all', 'all', 'REJECT', 'info' ],
);
set_config_file('rules',
(map
{ map_each { [ 'ACCEPT', $_, 'fw', $::a, join(',', @$::b), '-' ] } %ports_by_proto }
('net', if_($conf->{masquerade}, 'masq'), if_($conf->{loc_interface}, 'loc'))),
if_($conf->{masquerade}, map { [ 'ACCEPT', 'masq', 'fw', 'tcp', join(',', @drakgw_ports), '-' ] } 'tcp', 'udp'),
);
set_config_file('masq',
$conf->{masquerade} ? [ $conf->{net_interface}, $conf->{masquerade}{subnet} ]: (),
);
if ($conf->{disabled}) {
run_program::rooted($::prefix, 'chkconfig', '--del', 'shorewall');
run_program::run('service', 'shorewall', 'stop') if $::isStandalone;
run_program::run('service', 'shorewall', 'clear') if $::isStandalone;
} else {
run_program::rooted($::prefix, 'chkconfig', '--add', 'shorewall');
run_program::run('service', 'shorewall', 'restart') if $::isStandalone;
}
}
1;
|
