diff options
Diffstat (limited to 'perl-install/network')
| -rw-r--r-- | perl-install/network/netconnect.pm | 5 | ||||
| -rw-r--r-- | perl-install/network/shorewall.pm | 136 | ||||
| -rw-r--r-- | perl-install/network/tinyfirewall.pm | 180 |
3 files changed, 321 insertions, 0 deletions
diff --git a/perl-install/network/netconnect.pm b/perl-install/network/netconnect.pm index ad7ee7082..0f6bb1d80 100644 --- a/perl-install/network/netconnect.pm +++ b/perl-install/network/netconnect.pm @@ -331,6 +331,11 @@ fi $netcnx->{type} =~ /adsl/ or system("/sbin/chkconfig --del adsl 2> /dev/null"); save_conf($netcnx, $netc, $intf); + if ($::isInstall && $::o->{security} >= 3) { + require network::tinyfirewall; + network::tinyfirewall::main($in, $::o->{security} <= 3); + } + #- if ($netc->{NET_DEVICE} and $netc->{NETWORKING} ne 'no' and $::isStandalone and $::expert) { #- exists $netc->{nb_cards} or do { #- any::load_category($in, 'network/main|usb', !$::expert, 1); diff --git a/perl-install/network/shorewall.pm b/perl-install/network/shorewall.pm new file mode 100644 index 000000000..a9f8ff384 --- /dev/null +++ b/perl-install/network/shorewall.pm @@ -0,0 +1,136 @@ +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; + diff --git a/perl-install/network/tinyfirewall.pm b/perl-install/network/tinyfirewall.pm new file mode 100644 index 000000000..39df72521 --- /dev/null +++ b/perl-install/network/tinyfirewall.pm @@ -0,0 +1,180 @@ +package network::tinyfirewall; # $Id$ + +use diagnostics; +use strict; + +use network::shorewall; +use common; + +my @all_servers = +( + { + name => _("Web Server"), + pkg => 'apache apache-mod_perl boa', + ports => '80/tcp 443/tcp', + }, + { + name => _("Domain Name Server"), + pkg => 'bind', + ports => '53/tcp 53/udp', + }, + { + name => "SSH", + pkg => 'openssh-server', + ports => '22/tcp', + }, + { + name => "FTP", + pkg => 'ftp-server-krb5 wu-ftpd proftpd pure-ftpd', + ports => '20/tcp 21/tcp', + }, + { + name => _("Mail Server"), + pkg => 'sendmail postfix qmail', + ports => '25/tcp', + }, + { + name => _("POP and IMAP Server"), + pkg => 'imap courier-imap-pop', + ports => '109/tcp 110/tcp 143/tcp', + }, + { + name => "Telnet", + pkg => 'telnet-server-krb5', + ports => '23/tcp', + hide => 1, + }, + { + name => "CUPS", + pkg => 'cups', + ports => '631/tcp 631/udp', + hide => 1, + }, +); + +sub port2server { + my ($port) = @_; + foreach (@all_servers) { + return $_ if grep { $port eq $_ } split ' ', $_->{ports}; + } + undef; +} + +sub check_ports_syntax { + my ($ports) = @_; + foreach (split ' ', $ports) { + my ($nb) = m!^(\d+)/(tcp|udp)$! or return $_; + 1 <= $nb && $nb <= 65535 or return $_; + } + ''; +} + +sub to_ports { + my ($servers, $unlisted) = @_; + my $ports = join(' ', (map { $_->{ports} } @$servers), if_($unlisted, $unlisted)); + \$ports; +} + +sub from_ports { + my ($ports) = @_; + + my @l; + my @unlisted; + foreach (split ' ', $$ports) { + if (my $s = port2server($_)) { + push @l, $s; + } else { + push @unlisted, $_; + } + } + [ uniq(@l) ], join(' ', @unlisted); +} + +sub default_from_pkgs { + my ($in) = @_; + my @pkgs = $in->do_pkgs->are_installed(map { split ' ', $_->{pkg} } @all_servers); + [ grep { + my $s = $_; + grep { member($_, @pkgs) } split ' ', $s->{pkg}; + } @all_servers ]; +} + +sub get_ports { + my ($ports) = @_; + my $shorewall = network::shorewall::read() or return; + \$shorewall->{ports}; +} + +sub set_ports { + my ($disabled, $ports) = @_; + + my $shorewall = network::shorewall::read() || network::shorewall::default_interfaces() or die ''; + $shorewall->{disabled} = $disabled; + $shorewall->{ports} = $$ports; + + network::shorewall::write($shorewall); +} + +sub get_conf { + my ($in, $disabled, $ports) = @_; + + my $possible_servers = default_from_pkgs($in); + $_->{hide} = 0 foreach @$possible_servers; + + if ($ports) { + $disabled, from_ports($ports); + } elsif (my $shorewall = network::shorewall::read()) { + $shorewall->{disabled}, from_ports(\$shorewall->{ports}); + } else { + $in->ask_okcancel('', _("tinyfirewall configurator + +This configures a personal firewall for this Mandrake Linux machine. +For a powerful dedicated firewall solution, please look to the +specialized MandrakeSecurity Firewall distribution."), 1) or return; + + $disabled, $possible_servers, ''; + } +} + +sub choose { + my ($in, $disabled, $servers, $unlisted) = @_; + + $_->{on} = 0 foreach @all_servers; + $_->{on} = 1 foreach @$servers; + my @l = grep { $_->{on} || !$_->{hide} } @all_servers; + + $in->ask_from_({ + messages => _("Which services would you like to allow the Internet to connect to?"), + advanced_messages => _("You can enter miscellaneous ports. +Valid examples are: 139/tcp 139/udp. +Have a look at /etc/services for information."), + callbacks => { + complete => sub { + if (my $invalid_port = check_ports_syntax($unlisted)) { + $in->ask_warn('', _("Invalid port given: %s. +The proper format is \"port/tcp\" or \"port/udp\", +where port is between 1 and 65535.", $invalid_port)); + return 1; + } + }, + }}, + [ + { text => _("Everything (no firewall)"), val => \$disabled, type => 'bool' }, + (map { { text => $_->{name}, val => \$_->{on}, type => 'bool', disabled => sub { $disabled } } } @l), + { label => _("Other ports"), val => \$unlisted, advanced => 1, disabled => sub { $disabled } } + ]) or return; + + $disabled, to_ports([ grep { $_->{on} } @l ], $unlisted); +} + +sub main { + my ($in, $disabled) = @_; + + ($disabled, my $servers, my $unlisted) = get_conf($in, $disabled) or return; + + $in->do_pkgs->ensure_is_installed('shorewall', '/sbin/shorewall', $::isInstall) or return; + + ($disabled, my $ports) = choose($in, $disabled, $servers, $unlisted) or return; + + set_ports($disabled, $ports); +} |