Viewing file:  open-ports.pl (3.4 KB) -rwxr-xr-x
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#!/usr/bin/perl
# Open some ports on the firewall. Exit statuses are :
# 0 - Nothing needed to be done
# 1 - Given ports were opened up
# 2 - IPtables is not installed or supported
# 3 - No firewall is active
# 4 - Could not apply configuration
# 5 - Bad args
$no_acl_check++;
$ENV{'WEBMIN_CONFIG'} = "/etc/webmin";
$ENV{'WEBMIN_VAR'} = "/var/webmin";
if ($0 =~ /^(.*\/)[^\/]+$/) {
chdir($1);
}
require './firewall-lib.pl';
if ($module_name ne 'firewall') {
print STDERR "Command must be run with full path\n";
exit(5);
}
# Parse args
if ($ARGV[0] eq "--no-apply") {
$no_apply = 1;
shift(@ARGV);
}
if (!@ARGV) {
print STDERR "Missing ports to open\n";
exit(5);
}
foreach $p (@ARGV) {
if ($p !~ /^\d+$/ && $p !~ /^\d+:\d+$/ && $p !~ /^\d+(,\d+)*$/) {
print STDERR "Port $p must be number or start:end range\n";
exit(5);
}
}
# Check IPtables support
if (&foreign_installed($module_name, 1) != 2) {
print STDERR "IPtables is not available\n";
exit(2);
}
# Check if any rules exist
@tables = &get_iptables_save();
if (!@tables) {
print STDERR "No IPtables rules exist yet\n";
exit(3);
}
($filter) = grep { $_->{'name'} eq 'filter' } @tables;
if (!$filter) {
print STDERR "No IPtables filter table found\n";
exit(3);
}
elsif (!@{$filter->{'rules'}}) {
print STDERR "No IPtables rules found in filter table\n";
exit(3);
}
# Check if any rules are active
@livetables = &get_iptables_save("iptables-save 2>/dev/null |");
($livefilter) = grep { $_->{'name'} eq 'filter' } @livetables;
@added = ( );
PORT: foreach $p (@ARGV) {
# For each port, find existing rules
print STDERR "Checking for port $p ..\n";
foreach $r (@{$filter->{'rules'}}) {
if ($r->{'chain'} eq 'INPUT' &&
$r->{'j'} && $r->{'j'}->[1] eq 'ACCEPT' &&
$r->{'p'} && $r->{'p'}->[0] eq '' &&
$r->{'p'}->[1] eq 'tcp') {
# Found tcp rule .. check ports
@rports = ( );
$rrange = undef;
if ($r->{'dports'} && $r->{'dports'}->[0] eq '') {
push(@rports, split(/,/, $r->{'dports'}->[1]));
$rrange = $r->{'dports'}->[1];
}
if ($r->{'dport'} && $r->{'dport'}->[0] eq '') {
($s, $e) = split(":", $r->{'dport'}->[1]);
if ($s && $e) {
push(@rports, ($s .. $e));
}
elsif ($s) {
push(@rports, $s);
}
$rrange = $r->{'dport'}->[1];
}
if (&indexof($p, @rports) >= 0 ||
$p eq $rrange) {
print STDERR ".. already allowed\n";
next PORT;
}
}
}
# Add a rule at the top for this port
$r = { 'chain' => 'INPUT',
'm' => [ [ "", "tcp" ] ],
'p' => [ "", "tcp" ],
'j' => [ "", 'ACCEPT' ] };
if ($p =~ /,/) {
$r->{'dports'} = [ "", $p ];
push(@{$r->{'m'}}, [ "", "multiport" ]);
}
else {
$r->{'dport'} = [ "", $p ];
}
unshift(@{$filter->{'rules'}}, $r);
push(@added, $p);
}
if (@added) {
# Added some rules .. save them
&run_before_command();
&lock_file($iptables_save_file);
&save_table($filter);
&unlock_file($iptables_save_file);
&run_after_command();
©_to_cluster();
print STDERR "Opened ports ",join(" ", @added),"\n";
# Apply, if live
$ex = 1;
if (!$no_apply && $livefilter && @{$livefilter->{'rules'}}) {
$err = &apply_configuration();
if ($err) {
print "Failed to apply configuration : $err\n";
$ex = 4;
}
else {
print "Applied configuration successfully\n";
}
}
&webmin_log("openports", undef, undef, { 'ports' => \@added });
exit($ex);
}
else {
print STDERR "All ports are already open\n";
exit(0);
}
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