root/5100R/branches/dev/ui/base-firewall.mod/constructor/50_initialize_ruleset.pl

#!/usr/bin/perl -I /usr/sausalito/perl
# $Id$
# Copyright 2002, Sun Microsystems, Inc., All rights reserved.
#
# Builds a set of good-practice firewall rules.
# Opens listed ports to restricted_nics.  Denies all connections to
# closed_nics, and allows all access to nics.
#
# Ports are hash integer ranges; base => upper
#
# This is run once, on first activation of CCE.  Error detection for
# failed cce transactions are ignored--They have no context in a 
# factory constructor.  Oh well.

my $DEBUG = 0;
my $chain = 'input';

# default description, not used in UI as of 8/02
my $description = 'Default Ruleset';    

# The owner is essential to identifying this default firewall config
my $owner = 'default';  

# wide-open, restricted, and closed network interfaces
my @nics = ('lo', 'eth0', 'ipsec0', 'ipsec1', 'ipsec2'); 
my @restricted_nics = ('eth1', 'ppp0'); # WAN, selective
my @closed_nics = ();                   # Denies all

# each protocol must have a hash port map of the same name
my @protocols = ('tcp', 'udp', 'icmp', 'all');

my %pr;                                 # port range
$pr{'udp'} = {
        7 => 7,         # echo
        20 => 23,       # ftp, telnet, ssh
        25 => 25,       # smtp
        42 => 42,       # nameserver
        53 => 53,       # dns
        110 => 110,     # pop
        123 => 123,     # ntp
        143 => 143,     # imap
        220 => 220,     # imap3
        389 => 389,     # ldap
        161 => 162,     # snmp and snmp-trap
        520 => 520,     # RIP; not used ???
        1024 => 65535,  # active mode ftp
        };
$pr{'tcp'} = {
        7 => 7,         # echo
        20 => 23,       # ftp, telnet, ssh
        25 => 25,       # smtp
        42 => 42,       # nameserver
        53 => 53,       # dns
        110 => 110,     # pop
        123 => 123,     # ntp
        143 => 143,     # imap
        220 => 220,     # imap3
        389 => 389,     # ldap
        443 => 444,     # Cobalt admserv
        1024 => 65535,  # user apps
        };
$pr{'icmp'} = {
        };
$pr{'all'} = {
        };

use CCE;
my $cce = new CCE;
$cce->connectuds();

my $sysoid = ($cce->find('System'))[0];
my ($ok, $fw) = $cce->get($sysoid, 'Firewall');

if(!$ok || $fw->{initialized}) {
        $cce->bye('SUCCESS');
        exit 0;
}

# delete an existing default ruleset (Will's paranoia)
foreach my $rip ($cce->find('FirewallRule', {'owner' => $owner})) {
        $cce->destroy($rip);
}

# cycle through each nic, adding rules as necessary
foreach my $nic (@nics) {
        $DEBUG && warn "opening access to $nic";
        # add all-accept rule
        $cce->create('FirewallRule', {
                'policy' => 'ACCEPT',
                'interface' => $nic,
                'protocol' => 'all',
                'owner' => $owner,
                'description' => $description,
                }, undef);
}
foreach my $nic (@restricted_nics) {
        $DEBUG && warn "selectively access to $nic";
        foreach my $proto (@protocols) {
                while (my($port,$up) = each %{$pr{$proto}}) {
                        $DEBUG && warn "protocol: $proto, base port: $port, upper: $up\n";
                        $cce->create('FirewallRule', {
                                'policy' => 'ACCEPT',
                                'interface' => $nic,
                                'dest_ports' => $port.':'.$up,
                                'protocol' => $proto,
                                'owner' => $owner, 
                                'description' => $description,
                                }, undef);
                }
        }
}


# Create/edit the $chain & set default policy and associate the default ruleset
my @chains = $cce->find('FirewallChain', {'name' => $chain});
my @new = $cce->find('FirewallRule', {'owner' => $owner});
if ($chains[0]) {
        $DEBUG && warn "Found chain policy $oid, setting DENY";

        my ($ok, $chain) = $cce->get($oid);
        my @old = $cce->scalar_to_array( $chain->{rules} );
        push (@old, @new);
        my $rules = $cce->array_to_scalar( @old );

        $cce->set($chains[0], undef, {
                'default' => 'DENY',
                'rules' => $rules,
                });
} else {
        $DEBUG && warn "Creating $chain chain policy";

        my $rules = $cce->array_to_scalar( @new );
        $cce->create('FirewallChain', {
                'name' => $chain,
                'default' => 'DENY',
                'rules' => $rules,
                }, undef);
}

# Mark initialized, enable, commit
my $time = time();
$DEBUG && warn "commit changes at $time";
$cce->set($sysoid, 'Firewall', {
        'initialized' => 1,
        'enabled' => 1,
        });
$cce->set($sysoid, 'Firewall', {
        'commit' => $time,
        });

$cce->bye('SUCCESS');
exit 0;


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