用Perl语言登录Cisco PIX防火墙修改配置

##################################################
# Open the internet connection for an ip address.
# Usage: inet_conn.pl [-e | -d ] ip_address
##################################################
# 应该对IP地址进行测试
sub print_usage{
	print "Usage: inet_conn.pl [-e | -d ] ip_address n";
}

sub check_ip_address_valid{
	my $h = shift;
	# verify if ip address is valid.
	
	my $re='^([0-9]{1,3}).([0-9]{1,3})$';
	if(!($h =~ /$re/)){
		print "The ip address '$h' is not valid.n";
		exit 1;
	}
	if($1 < 0 || $2 < 0 || $3 < 0 || $4 < 0 || $1 > 255 || $2 > 255 || $3 > 255 || $4 > 255 ){
		print "The ip address '$h' is not valid.n";
		exit 1;
	}
}

sub get_conf{
	my $abc;
	$t->open("10.10.10.1");
	$t->waitfor('/PIX passwd:.*$/');
	$t->print('pwd1');

	$t->waitfor('/out-pix> .*$/');
	$t->print('enable');
	$t->waitfor('/Password:.*$/');

	$t->print('pwd2');
	$t->waitfor('/out-pix#.*$/');

	$t->print('pager lines 0');
	$t->waitfor('/out-pix#.*$/');

	$t->print('show config');
	($abc) = $t->waitfor('/out-pix#.*$/');
	return $abc;
}
# Main program begins.
$argc = scalar(@ARGV);
if ( $argc > 2 || $argc < 1){
	print_usage;
	exit 1;
}

# login to the pix firewall and get the configuration.
use Net::Telnet ();
 $t = new Net::Telnet (Timeout => 10,Prompt => '/PIX passwd:.*$/',Errmode => 'return');
my $abc;

# check if the ip address is already opened.
if($argc == 1){
	# display status
	 $h = $ARGV[0];
	check_ip_address_valid($h);
	$abc = get_conf();
	 $ip="nat (inside) 1 $h 255.255.255.255 0 0";
	$ip =~ s/././g;
	$ip =~ s/(/(/g;
	$ip =~ s/)/)/g;

	if ($abc =~ ?$ip?){
		print  "The ip address '$h' is OPENED." ;
	}else{
		print  "The ip address '$h' is CLOSED." ;
	}
	$t->print('exit');
	exit 0;
}

if($argc == 2){
	 $s = $ARGV[0];
	 $h=$ARGV[1];
	if($s eq "-e"){
		check_ip_address_valid($h);
		$abc = get_conf();
		# open the internet connection
		 $ip="nat (inside) 1 $h 255.255.255.255 0 0";
		$ip =~ s/././g;
		$ip =~ s/(/(/g;
		$ip =~ s/)/)/g;

		if ($abc =~ ?$ip?){
			print  "The ip address '$h' is ALREADY OPENED!" ;
			exit 0;
		}

		$t->print('conf t');
		$t->waitfor('/out-pix(config)#.*$/');

		 $cmd="nat (inside) 1 $h 255.255.255.255 0 0";

		$t->print($cmd);
		$t->waitfor('/out-pix(config)#.*$/');

		$t->print('exit');
		$t->waitfor('/out-pix#.*$/');

		$t->print('wr mem');
		$t->waitfor('/out-pix#.*$/');

		$t->print('exit');

		print  "The ip address '$h' is OPENED SUCCESSFULLY.n" ;
		exit 0;

	}elsif($s eq "-d"){
		check_ip_address_valid($h);
		# close the internet connection
		$abc = get_conf();
		 $ip="nat (inside) 1 $h 255.255.255.255 0 0";
		$ip =~ s/././g;
		$ip =~ s/(/(/g;
		$ip =~ s/)/)/g;

		# the internet connection must be 'open'.
		if (!($abc =~ ?$ip?)){
			print  "The ip address '$h' is NOT PENED." ;
			exit 0;
		}

		$t->print('conf t');
		$t->waitfor('/out-pix(config)#.*$/');

		 $cmd="no nat (inside) 1 $h 255.255.255.255 0 0";

		$t->print($cmd);
		$t->waitfor('/out-pix(config)#.*$/');

		$t->print('exit');
		$t->waitfor('/out-pix#.*$/');

		$t->print('wr mem');
		$t->waitfor('/out-pix#.*$/');

		$t->print('exit');

		print  "The ip address '$h' is CLOSED SUCCESSFULLY.n" ;
		$t->print('exit');
		exit 0;
	}else{
		print('exit');
		print_usage;
		exit 1;
	}
}
exit 0;