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authorPascal Rigaux <pixel@mandriva.com>2002-08-21 20:43:53 +0000
committerPascal Rigaux <pixel@mandriva.com>2002-08-21 20:43:53 +0000
commit8fe9c59069370a3d38004798ede21ec64e9cd696 (patch)
treea93b31ebff6b0fbcf90722d939f4d93fb0e80544 /perl-install/tinyfirewall.pm
parent48df454d604810ab006d7f3ce1b545c83df1e540 (diff)
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- complete rework & cleanup
- but the backend is still missing
Diffstat (limited to 'perl-install/tinyfirewall.pm')
-rw-r--r--perl-install/tinyfirewall.pm381
1 files changed, 153 insertions, 228 deletions
diff --git a/perl-install/tinyfirewall.pm b/perl-install/tinyfirewall.pm
index e893f1667..422efd7b8 100644
--- a/perl-install/tinyfirewall.pm
+++ b/perl-install/tinyfirewall.pm
@@ -1,243 +1,168 @@
-package tinyfirewall;
+package tinyfirewall; # $Id$
+
use diagnostics;
use strict;
-use run_program;
-use network::netconnect;
-use network;
-use POSIX qw(tmpnam);
-use MDK::Common;
-my @messages = (_("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."),
-_("We'll now ask you questions about which services you'd like to allow
-the Internet to connect to. Please think carefully about these
-questions, as your computer's security is important.
-
-Please, if you're not currently using one of these services, firewall
-it off. You can change this configuration anytime you like by
-re-running this application!"),
-_("Are you running a web server on this machine that you need the whole
-Internet to see? If you are running a webserver that only needs to be
-accessed by this machine, you can safely answer NO here.
-
-"),
-_("Are you running a name server on this machine? If you didn't set one
-up to give away IP and zone information to the whole Internet, please
-answer no.
-
-"),
-_("Do you want to allow incoming Secure Shell (ssh) connections? This
-is a telnet-replacement that you might use to login. If you're using
-telnet now, you should definitely switch to ssh. telnet is not
-encrypted -- so some attackers can steal your password if you use
-it. ssh is encrypted and doesn't allow for this eavesdropping."),
-_("Do you want to allow incoming telnet connections?
-This is horribly unsafe, as we explained in the previous screen. We
-strongly recommend answering No here and using ssh in place of
-telnet.
-"),
-_("Are you running an FTP server here that you need accessible to the
-Internet? If you are, we strongly recommend that you only use it for
-Anonymous transfers. Any passwords sent by FTP can be stolen by some
-attackers, since FTP also uses no encryption for transferring passwords.
-"),
-_("Are you running a mail server here? If you're sending you
-messages through pine, mutt or any other text-based mail client,
-you probably are. Otherwise, you should firewall this off.
-
-"),
-_("Are you running a POP or IMAP server here? This would
-be used to host non-web-based mail accounts for people via
-this machine.
-
-"),
-_("You appear to be running a 2.2 kernel. If your network IP
-is automatically set by a computer in your home or office
-(dynamically assigned), we need to allow for this. Is
-this the case?
-"),
-_("Is your computer getting time syncronized to another computer?
-Mostly, this is used by medium-large Unix/Linux organizations
-to synchronize time for logging and such. If you're not part
-of a larger office and haven't heard of this, you probably
-aren't."),
-_("Configuration complete. May we write these changes to disk?
-
-
-
-")
+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,
+ },
);
-my %settings;
-my $config_file = "/etc/Bastille/bastille-firewall.cfg";
-my $default_config_file = "/usr/share/Bastille/bastille-firewall.cfg"; # set this later
-sub ReadConfig {
- -e $config_file or cp_af($default_config_file, $config_file);
- add2hash(\%settings, { getVarsFromSh("$config_file") });
-}
-sub SaveConfig {
- my $tmp_file = tmpnam();
- open CONFIGFILE, "$config_file"
- or die _("Can't open %s: %s\n", $config_file, $!);
- open TMPFILE, ">$tmp_file"
- or die _("Can't open %s for writing: %s\n", $tmp_file, $!);
- while (my $line = <CONFIGFILE>) {
- if ($line =~ m/^(.+)\s*\=\s*"(.*)"/) {
- my ($variable, $value) = ($1, $2);
- my $newvalue = $settings{$variable};
- $line =~ s/".*"/"$newvalue"/
- if (exists $settings{$variable});
- }
- print TMPFILE $line;
- }
- close CONFIGFILE;
- close TMPFILE;
- rename ($config_file, $config_file . ".orig");
- system ("/bin/cp $tmp_file $config_file");
- system ("/bin/rm $tmp_file");
+
+sub port2server {
+ my ($port) = @_;
+ foreach (@all_servers) {
+ return $_ if grep { $port eq $_ } split ' ', $_->{ports};
+ }
+ undef;
}
-sub DoInterface {
- my ($in)=@_;
- $::isWizard=1;
- my $GetNetworkInfo = sub {
- $settings{DNS_SERVERS} = join(' ', uniq(split(' ', $settings{DNS_SERVERS}),
- @{network::read_resolv_conf("/etc/resolv.conf")}{'dnsServer', 'dnsServer2', 'dnsServer3'}));
- my (undef, undef, @netstat) = `/bin/netstat -in`;
- my @interfaces = map { /(\S+)/ } @netstat;
- my (@route, undef, undef) = `/sbin/route -n`;
- my $defaultgw;
- my $iface;
- foreach (@route) { my @parts = split /\s+/; $parts[0] eq "0.0.0.0" and $defaultgw = $parts[1], $iface = $parts[7] }
- my $fulliface = $iface;
- $fulliface =~ s/[0-9]+/\\\+/;
- $settings{PUBLIC_INTERFACES} = join(' ', uniq(split(' ', $settings{PUBLIC_INTERFACES}), $iface));
- $settings{PUBLIC_INTERFACES} =~ $fulliface and $settings{PUBLIC_INTERFACES} =~ s/$iface *//;
- $settings{INTERNAL_IFACES} = join(' ', uniq(split(' ', $settings{INTERNAL_IFACES}),
- map { my $i = $_; my $f = $i; $f =~ s/[0-9]+/\\\+/;
- if_(and_(map { $settings{$_} !~ /$i/ and $settings{$_} !~ /$f/ } ('TRUSTED_IFACES', 'PUBLIC_IFACES', 'INTERNAL_IFACES')), $i)
- } @interfaces));
- };
-# my $popimap = sub { $_[0] or return; $settings{FORCE_PASV_FTP} = 11; mapn {$settings{"$_[0]"} = "$_[1]"; }
-#[ qw(FORCE_PASV_FTP TCP_BLOCKED_SERVICES UDP_BLOCKED_SERVICES ICMP_ALLOWED_TYPES ENABLE_SRC_ADDR_VERIFY IP_MASQ_NETWORK IP_MASQ_MODULES REJECT_METHOD) ] ,
-#[ "N", "6000:6020", "2049", "destination-unreachable echo-reply time-exceeded" , "Y", "", "", "DENY" ]; };
- my $popimap = sub {
- $_[0] or return;
- $settings{'FORCE_PASV_FTP'} = "N";
- $settings{TCP_BLOCKED_SERVICES}= "6000:6020";
- $settings{UDP_BLOCKED_SERVICES}= "2049";
- $settings{ICMP_ALLOWED_TYPES}= "destination-unreachable echo-reply time-exceeded";
- $settings{ENABLE_SRC_ADDR_VEIFY}= "Y";
- $settings{IP_MASQ_NETWORK}= "";
- $settings{IP_MASQ_MODULES}= "";
- $settings{REJECT_METHOD}= "DENY";
- };
- # my $ntp = sub { $_[0] or return; mapn { $settings{$_[0]} = $_[1] } ['ICMP_OUTBOUND_DISABLED_TYPES}', 'LOG_FAILURES'], [ "", "N"] };
- my $ntp = sub { $_[0] or return;
- $settings{'ICMP_OUTBOUND_DISABLED_TYPES}'} = "";
- $settings{'LOG_FAILURES'} = "N";
- };
- my $dhcp = sub { if ($_[0]) {
- $settings{DHCP_IFACES} and return;
- my (undef, undef, @netstat) = `/bin/netstat -in`;
- $settings{DHCP_IFACES} = join(' ', split(' ', $settings{DHCP_IFACES}), map { /(\S+)/ } @netstat);
- } else { $settings{DHCP_IFACES} = "" } };
- my $quit = sub {
- $_[0] or $in->exit(0);
- SaveConfig();
- system($_) foreach ("/bin/cp /usr/share/Bastille/bastille-ipchains /usr/share/Bastille/bastille-netfilter /sbin",
- "/bin/cp /usr/share/Bastille/bastille-firewall /etc/rc.d/init.d/",
- "/bin/chmod 0700 /etc/rc.d/init.d/bastille-firewall", "/bin/chmod 0700 /sbin/bastille-ipchains",
- "/bin/chmod 0700 /sbin/bastille-netfilter", "/sbin/chkconfig bastille-firewall on",
- "/etc/rc.d/init.d/bastille-firewall stop", "/etc/rc.d/init.d/bastille-firewall start");
- $in->exit(0);
- return;
- $_[0] or $in->exit(0);
- cp_af($config_file, $config_file . ".orig");
- substInFile {
- if (/^(.+)\s*\=/) {
- $a = $settings{ $1 };
- s/".*"/"$a"/;
- }
- } $config_file;
- system($_) foreach ("/bin/cp /usr/share/Bastille/bastille-ipchains /usr/share/Bastille/bastille-netfilter /sbin",
- "/bin/cp /usr/share/Bastille/bastille-firewall /etc/rc.d/init.d/",
- "/bin/chmod 0700 /etc/rc.d/init.d/bastille-firewall", "/bin/chmod 0700 /sbin/bastille-ipchains",
- "/bin/chmod 0700 /sbin/bastille-netfilter", "/sbin/chkconfig bastille-firewall on",
- "/etc/rc.d/init.d/bastille-firewall stop", "/etc/rc.d/init.d/bastille-firewall start") };
- my @struct = (
- [$GetNetworkInfo],
- [],
- [undef , undef, undef, undef, ["tcp", "80"], ["tcp", "443"]],
- [undef , undef, undef, undef, ["tcp", "53"], ["udp", "53"]],
- [undef , undef, undef, undef, ["tcp", "22"]],
- [undef , undef, undef, undef, ["tcp", "23"]],
- [undef , undef, undef, undef, ["tcp", "20"],["tcp", "21"]],
- [undef , undef, undef, undef, ["tcp", "25"]],
- [undef , undef, undef, $popimap, ["tcp", "109"], ["tcp", "110"], ["tcp", "143"]],
- [undef , _("No I don't need DHCP"), _("Yes I need DHCP"), $dhcp],
- [undef , _("No I don't need NTP"), _("Yes I need NTP"), $ntp ],
- [undef , _("Don't Save"), _("Save & Quit"), $quit ]
- );
- if (!Kernel22()) {
- pop @struct; pop @struct; pop @struct;
- @struct = (@struct, [undef , _("Don't Save"), _("Save & Quit"), $quit ]);
- $messages[9]=$messages[11];
+
+sub check_ports_syntax {
+ my ($ports) = @_;
+ foreach (split ' ', $ports) {
+ my ($nb) = m!^(\d+)/(tcp|udp)$! or return $_;
+ 1 <= $nb && $nb <= 65535 or return $_;
}
- for (my $i = 0; $i<@struct; $i++) {
- $::Wizard_no_previous = $i == 0;
- $::Wizard_finished = $i == $#struct;
- my $l = $struct[$i];
- @$l or goto ask;
- if (@$l == 1) {
- ($l->[0])->();
- ask:
- $in->ask_okcancel(_("Firewall Configuration Wizard"), $messages[$i],1) ? next : goto prev;
- }
- my $no = $l->[1] ? $l->[1] : _("No (firewall this off from the internet)");
- my $yes = $l->[2] ? $l->[2] : _("Yes (allow this through the firewall)");
- if (my $e = $in->ask_from_list_(_("Firewall Configuration Wizard"),
- $messages[$i],
- [ $yes, $no ], or_(map { $_ && CheckService($_->[0], $_->[1]) } (@$l[4..6])) ? $yes : $no
- )) {
- map { $_ and Service($e=~/Yes/, $_->[0], $_->[1]) } (@{$struct[$i]}[4..6]);
- $struct[$i][3] and $struct[$i][3]->($e=~/Yes/ || $e eq _("Save & Quit"));
+ '';
+}
+
+sub to_ports {
+ my ($servers, $unlisted) = @_;
+ my $ports = join(' ', (map { $_->{ports} } @$servers), if_($unlisted, $unlisted));
+ \$ports;
+}
+
+sub from_ports {
+ my ($ports) = @_;
+
+ my @l;
+ my @unlisted;
+ foreach (split ' ', $$ports) {
+ if (my $s = port2server($_)) {
+ push @l, $s;
} else {
- prev:
- $i = $i-2 >= -1 ? $i-2 : -1;
+ push @unlisted, $_;
}
}
+ [ uniq(@l) ], join(' ', @unlisted);
}
-sub unbox_service {
- split ' ', $settings{uc($_[0]) . "_PUBLIC_SERVICES"}
+
+sub default_from_pkgs {
+ my ($in) = @_;
+ my @pkgs = $in->do_pkgs->are_installed(map { split ' ', $_->{pkg} } @all_servers);
+ [ grep {
+ my $s = $_;
+ grep { member($_, @pkgs) } split ' ', $s->{pkg};
+ } @all_servers ];
}
-sub Service {
- my ($add, $protocol, $port) = @_;
- my @l = unbox_service($protocol);
- @l = uniq($add ? (@l, $port) : grep { $_ ne $port } @l);
- $settings{uc($protocol) . "_PUBLIC_SERVICES"} = join(' ', @l);
+
+sub get_ports {
}
-sub CheckService { member($_[1], unbox_service($_[0])) }
-sub Kernel22 {
- my ($major, $minor, $patchlevel) = (cat_("/proc/version"))[0] =~ m/^Linux version ([0-9]+)\.([0-9]+)\.([0-9]+)/;
- $major eq "2" && $minor eq "2";
+
+sub set_ports {
+ my ($ports) = @_;
+ print "set_ports $$ports\n";
}
-sub main {
- my ($in)=@_;
- my $dialog = new Gtk::Dialog();
- $dialog->set_position(1);
- $dialog->vbox->set_border_width(10);
- my $label = new Gtk::Label(_("Please Wait... Verifying installed packages"));
- $dialog->signal_connect (delete_event => sub { Gtk->main_quit() });
- $dialog->vbox->pack_start($label,1,1,20);
- $dialog->show_all;
- Gtk->main_iteration while Gtk->events_pending;
- if (!$in->do_pkgs->install(Kernel22() ? "ipchains" : "iptables", "Bastille")) {
- $in->ask_warn('', _("Failure installing the needed packages : %s and Bastille.
- Try to install them manually.", Kernel22() ? "ipchains" : "iptables") );
- $dialog->destroy;
- $in->exit(0);
+
+sub get_conf {
+ my ($in, $ports) = @_;
+
+ my $possible_servers = default_from_pkgs($in);
+ $_->{hide} = 0 foreach @$possible_servers;
+
+ if ($ports ||= get_ports()) {
+ from_ports($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;
+
+ $possible_servers, '';
}
- ReadConfig;
- DoInterface($in);
+}
+
+sub choose {
+ my ($in, $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;
+ }
+ },
+ }},
+ [
+ (map { { text => $_->{name}, val => \$_->{on}, type => 'bool' } } @l),
+ { label => _("Other ports"), val => \$unlisted, advanced => 1 }
+ ]) or return;
+
+ to_ports([ grep { $_->{on} } @l ], $unlisted);
+}
+
+sub main {
+ my ($in) = @_;
+
+ my ($servers, $unlisted) = get_conf($in) or return;
+
+ $in->do_pkgs->ensure_is_installed('shorewall', '/sbin/shorewall', $::isInstall) or return;
+
+ my $ports = choose($in, $servers, $unlisted) or return;
+
+ set_ports($ports);
}