--- loncom/configuration/Firewall.pm 2013/02/08 14:55:12 1.12
+++ loncom/configuration/Firewall.pm 2021/12/20 03:13:29 1.23
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# Firewall configuration to allow internal LON-CAPA communication between servers
#
-# $Id: Firewall.pm,v 1.12 2013/02/08 14:55:12 raeburn Exp $
+# $Id: Firewall.pm,v 1.23 2021/12/20 03:13:29 raeburn Exp $
#
# The LearningOnline Network with CAPA
#
@@ -37,21 +37,67 @@ use lib '/home/httpd/perl/lib';
use LONCAPA::Configuration;
use LONCAPA;
+sub uses_firewalld {
+ my ($distro) = @_;
+ if ($distro eq '') {
+ $distro = &get_distro();
+ }
+ my ($inuse,$checkfirewalld);
+ if ($distro =~ /^(suse|sles)([\d\.]+)$/) {
+ if (($1 eq 'sles') && ($2 >= 15)) {
+ $checkfirewalld = 1;
+ }
+ } elsif ($distro =~ /^fedora(\d+)$/) {
+ if ($1 >= 18) {
+ $checkfirewalld = 1;
+ }
+ } elsif ($distro =~ /^(?:centos|rhes|scientific|oracle|rocky|alma)(\d+)/) {
+ if ($1 >= 7) {
+ $checkfirewalld = 1;
+ }
+ }
+ if ($checkfirewalld) {
+ my ($loaded,$active);
+ if (open(PIPE,"systemctl status firewalld 2>&1 |")) {
+ while (<PIPE>) {
+ chomp();
+ if (/^\s*Loaded:\s+(\w+)/) {
+ $loaded = $1;
+ }
+ if (/^\s*Active\s+(\w+)/) {
+ $active = $1;
+ }
+ }
+ close(PIPE);
+ }
+ if (($loaded eq 'loaded') || ($active eq 'active')) {
+ $inuse = 1;
+ }
+ }
+ return $inuse;
+}
+
sub firewall_open_port {
- my ($iptables,$fw_chains,$lond_port,$iphost,$ports) = @_;
+ my ($iptables,$fw_chains,$lond_port,$iphost,$ports,$firewalld) = @_;
return 'inactive firewall' if (!&firewall_is_active());
return 'port number unknown' if !$lond_port;
return 'invalid firewall chain' unless (ref($fw_chains) eq 'ARRAY');
- my (@opened,@chains,@badchains,@okchains);
- foreach my $chain (@{$fw_chains}) {
- if ($chain =~ /^([\w\-]+)$/) {
- push(@okchains,$1);
- } else {
- push(@badchains,$chain);
+ my (@opened,@okchains,$zone);
+ if ($firewalld) {
+ $zone = &get_default_zone();
+ return 'invalid zone' if ($zone eq '');
+ } else {
+ my @badchains;
+ foreach my $chain (@{$fw_chains}) {
+ if ($chain =~ /^([\w\-]+)$/) {
+ push(@okchains,$1);
+ } else {
+ push(@badchains,$chain);
+ }
+ }
+ if (!@okchains) {
+ return 'None of the chain names has the expected format.'."\n";
}
- }
- if (!@okchains) {
- return 'None of the chain names has the expected format'."\n";
}
if (ref($ports) ne 'ARRAY') {
return 'List of ports to open needed.';
@@ -61,7 +107,7 @@ sub firewall_open_port {
if ($portnum =~ /^(\d+)$/) {
$port = $1;
} else {
- print "Skipped non-numeric port: $portnum\n";
+ print "Skipped non-numeric port: $portnum.\n";
next;
}
print "Opening firewall access on port $port.\n";
@@ -73,56 +119,104 @@ sub firewall_open_port {
@lond_port_curropen);
if (ref($iphost) eq 'HASH') {
if (keys(%{$iphost}) > 0) {
+ my $count = scalar(keys(%{$iphost}));
+ if ($count > 1) {
+ print "Please be patient. Checking $count IPs.\n";
+ }
my %curropen;
- foreach my $fw_chain (@okchains) {
- &firewall_close_anywhere($iptables,$fw_chain,$port);
- my $current = &firewall_is_port_open($iptables,$fw_chain,$port,$lond_port,$iphost,\%curropen);
+ if ($firewalld) {
+ &firewall_close_anywhere($iptables,$zone,$port,$firewalld);
+ my $current = &firewall_is_port_open($iptables,$zone,$port,
+ $lond_port,$iphost,\%curropen,
+ $firewalld);
+ } else {
+ foreach my $fw_chain (@okchains) {
+ &firewall_close_anywhere($iptables,$fw_chain,$port);
+ my $current = &firewall_is_port_open($iptables,$fw_chain,$port,
+ $lond_port,$iphost,\%curropen);
+ }
}
+ my $countok = 0;
foreach my $key (keys(%{$iphost})) {
my $ip = '';
if ($key =~ /^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/) {
if (($1<=255) && ($2<=255) && ($3<=255) && ($4<=255)) {
$ip = "$1.$2.$3.$4";
} else {
+ print "IP address: $key does not have expected format.\n";
next;
}
} else {
+ print "IP address: $key does not have expected format.\n";
next;
}
if ($curropen{$ip}) {
push(@lond_port_curropen,$ip);
} else {
- foreach my $fw_chain (@okchains) {
- my $firewall_command =
- "$iptables -I $fw_chain -p tcp -s $ip -d 0/0 --dport $port -j ACCEPT";
- system($firewall_command);
- my $return_status = $?>>8;
- if ($return_status == 1) {
- unless(grep(/^\Q$ip\E$/,@port_error)) {
- push (@port_error,$ip);
+ if ($firewalld) {
+ my $cmd = 'firewall-cmd --zone='.$zone.' --add-rich-rule \'rule family="ipv4" source address="'.$ip.'/32" port port="'.$port.'" protocol="tcp" accept\'';
+ if (open(PIPE,"$cmd |")) {
+ my $result = <PIPE>;
+ chomp($result);
+ close(PIPE);
+ if ($result eq 'success') {
+ push(@lond_port_open,$ip);
+ } else {
+ push(@port_error,$ip);
+ }
+ }
+ } else {
+ foreach my $fw_chain (@okchains) {
+ my $firewall_command =
+ "$iptables -I $fw_chain -p tcp -s $ip -d 0/0 --dport $port -j ACCEPT";
+ system($firewall_command);
+ my $return_status = $?>>8;
+ if ($return_status == 1) {
+ unless(grep(/^\Q$ip\E$/,@port_error)) {
+ push(@port_error,$ip);
+ }
+ } elsif ($return_status == 2) {
+ push(@{$command_error{$fw_chain}},$ip);
+ } elsif ($return_status == 0) {
+ push(@lond_port_open,$ip);
+ last;
}
- } elsif ($return_status == 2) {
- push(@{$command_error{$fw_chain}},$ip);
- } elsif ($return_status == 0) {
- push(@lond_port_open,$ip);
- last;
}
}
}
+ if ($count > 1) {
+ $countok ++;
+ print '.';
+ if ($countok%40 == 0) {
+ print "\n";
+ }
+ }
+ }
+ if ($count > 1) {
+ if ($countok%40) {
+ print "\n";
+ }
}
+ } else {
+ print "no key found in \$iphost hash ref.\n".
+ "Domain Name Service (DNS) may not be available.\n".
+ "If this LON-CAPA node is standalone, then you can fix this issue by modifying /etc/hosts.\n".
+ "Use a text editor to add: IPaddress Hostname\n";
}
+ } else {
+ print "\$iphost is not a reference to a hash\n";
}
if (@lond_port_curropen) {
unless (grep(/^\Q$port\E$/,@opened)) {
push(@opened,$port);
}
- print "Port already open for ".scalar(@lond_port_curropen)." IP addresses\n";
+ print "Port already open for ".scalar(@lond_port_curropen)." IP addresses.\n";
}
if (@lond_port_open) {
unless (grep(/^\Q$port\E$/,@opened)) {
push(@opened,$port);
}
- print "Port opened for ".scalar(@lond_port_open)." IP addresses\n";
+ print "Port opened for ".scalar(@lond_port_open)." IP addresses.\n";
}
if (@port_error) {
print "Error opening port for following IP addresses: ".join(', ',@port_error)."\n";
@@ -139,30 +233,50 @@ sub firewall_open_port {
}
}
} else {
- my (@port_errors,%command_errors);
- foreach my $fw_chain (@okchains) {
- my $firewall_command =
- "$iptables -I $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT";
- system($firewall_command);
- my $return_status = $?>>8;
- if ($return_status == 1) {
- push(@port_errors,$fw_chain);
- } elsif ($return_status == 2) {
- $command_errors{$fw_chain} = $firewall_command;
- } elsif ($return_status == 0) {
- push(@opened,$port);
- last;
+ if ($firewalld) {
+ my ($port_error);
+ my $cmd = 'firewall-cmd --zone='.$zone.' --add-rich-rule \'rule family="ipv4" port port="'.$port.'" protocol="tcp" accept\'';
+ if (open(PIPE,"$cmd |")) {
+ my $result = <PIPE>;
+ chomp($result);
+ close(PIPE);
+ if ($result eq 'success') {
+ push(@opened,$port);
+ } else {
+ $port_error = $port;
+ }
+ } else {
+ $port_error = $port;
}
- }
- unless (grep(/^\Q$port\E$/,@opened)) {
- if (@port_errors) {
- print "Error opening port for chains: ".
- join(', ',@port_errors).".\n";
- }
- if (keys(%command_errors)) {
- foreach my $fw_chain (sort(keys(%command_errors))) {
- print "Bad command error opening port for chain: $fw_chain. Command was\n".
- " ".$command_errors{$fw_chain}."\n";
+ if ($port_error) {
+ print "Error opening port: $port\n";
+ }
+ } else {
+ my (@port_errors,%command_errors);
+ foreach my $fw_chain (@okchains) {
+ my $firewall_command =
+ "$iptables -I $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT";
+ system($firewall_command);
+ my $return_status = $?>>8;
+ if ($return_status == 1) {
+ push(@port_errors,$fw_chain);
+ } elsif ($return_status == 2) {
+ $command_errors{$fw_chain} = $firewall_command;
+ } elsif ($return_status == 0) {
+ push(@opened,$port);
+ last;
+ }
+ }
+ unless (grep(/^\Q$port\E$/,@opened)) {
+ if (@port_errors) {
+ print "Error opening port for chains: ".
+ join(', ',@port_errors).".\n";
+ }
+ if (keys(%command_errors)) {
+ foreach my $fw_chain (sort(keys(%command_errors))) {
+ print "Bad command error opening port for chain: $fw_chain. Command was\n".
+ " ".$command_errors{$fw_chain}."\n";
+ }
}
}
}
@@ -177,14 +291,44 @@ sub firewall_open_port {
}
sub firewall_is_port_open {
- my ($iptables,$fw_chain,$port,$lond_port,$iphost,$curropen) = @_;
+ my ($iptables,$fw_chain,$port,$lond_port,$iphost,$curropen,$firewalld) = @_;
# for lond port returns number of source IPs for which firewall port is open
# for other ports returns 1 if the firewall port is open, 0 if not.
- #
- # check if firewall is active or installed
- return if (! &firewall_is_active());
+ # if firewalld is in use, checks for rich rules only.
my $count = 0;
- if (open(PIPE,"$iptables -L $fw_chain -n |")) {
+ # check if firewall is active or installed
+ return $count if (! &firewall_is_active());
+ if ($firewalld) {
+ my $zone = &get_default_zone();
+ return $count if ($zone eq '');
+ if ($port eq $lond_port) {
+ if (open(PIPE,"firewall-cmd --zone=$zone --list-rich-rules |")) {
+ while(<PIPE>) {
+ chomp();
+ if (/\Qrule family="ipv4" source address="\E([\d.]+)\Q\/32" port port="$port" protocol="tcp" accept\E/) {
+ my $ip = $1;
+ if ($iphost->{$ip}) {
+ $count ++;
+ if (ref($curropen) eq 'HASH') {
+ $curropen->{$ip} ++;
+ }
+ }
+ }
+ }
+ close(PIPE);
+ }
+ } else {
+ if (open(PIPE,"firewall-cmd --zone=$zone --list-rich-rules |")) {
+ while(<PIPE>) {
+ if (/\Qrule family="ipv4" port port="$port" protocol="tcp" accept\E/) {
+ $count ++;
+ last;
+ }
+ }
+ close(PIPE);
+ }
+ }
+ } elsif (($fw_chain =~ /^[\w-]+$/) && (open(PIPE,"$iptables -L $fw_chain -n |"))) {
while(<PIPE>) {
if ($port eq $lond_port) {
if (ref($iphost) eq 'HASH') {
@@ -198,11 +342,9 @@ sub firewall_is_port_open {
}
}
}
- } else {
- if (/tcp dpt\:\Q$port\E/) {
- $count ++;
- last;
- }
+ } elsif (/tcp dpt\:\Q$port\E/) {
+ $count ++;
+ last;
}
}
close(PIPE);
@@ -211,28 +353,46 @@ sub firewall_is_port_open {
}
sub firewall_is_active {
+ my $status = 0;
if (-e '/proc/net/ip_tables_names') {
- return 1;
- } else {
- return 0;
+ if (open(PIPE,'cat /proc/net/ip_tables_names |')) {
+ while(<PIPE>) {
+ chomp();
+ if (/^filter$/) {
+ $status = 1;
+ last;
+ }
+ }
+ close(PIPE);
+ }
}
+ unless ($status) {
+ $status = &uses_firewalld();
+ }
+ return $status;
}
sub firewall_close_port {
- my ($iptables,$fw_chains,$lond_port,$iphost,$ports) = @_;
+ my ($iptables,$fw_chains,$lond_port,$iphost,$ports,$firewalld) = @_;
return 'inactive firewall' if (!&firewall_is_active());
return 'port number unknown' if !$lond_port;
return 'invalid firewall chain' unless (ref($fw_chains) eq 'ARRAY');
- my (@opened,@chains,@badchains,@okchains);
- foreach my $chain (@{$fw_chains}) {
- if ($chain =~ /^([\w\-]+)$/) {
- push(@okchains,$1);
- } else {
- push(@badchains,$chain);
+ my (@okchains,$zone);
+ if ($firewalld) {
+ $zone = &get_default_zone();
+ return 'no default zone' if ($zone eq '');
+ } else {
+ my @badchains;
+ foreach my $chain (@{$fw_chains}) {
+ if ($chain =~ /^([\w\-]+)$/) {
+ push(@okchains,$1);
+ } else {
+ push(@badchains,$chain);
+ }
+ }
+ if (!@okchains) {
+ return 'None of the chain names has the expected format.'."\n";
}
- }
- if (!@okchains) {
- return 'None of the chain names has the expected format'."\n";
}
if (ref($ports) ne 'ARRAY') {
return 'List of ports to close needed.';
@@ -248,19 +408,17 @@ sub firewall_close_port {
print "Closing firewall access on port $port.\n";
if (($port ne '') && ($port eq $lond_port)) {
my $output;
- foreach my $fw_chain (@okchains) {
- my (@port_error,@command_error,@lond_port_close);
- my %to_close;
- if (open(PIPE, "$iptables -n -L $fw_chain |")) {
- while (<PIPE>) {
- chomp();
- next unless (/dpt:\Q$port\E\s*$/);
- if (/^ACCEPT\s+tcp\s+\-{2}\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s+/) {
+ if ($firewalld) {
+ my (%to_close,@port_error,@lond_port_close);
+ my $cmd = 'firewall-cmd --list-rich-rules';
+ if (open(PIPE,"$cmd |")) {
+ while(<PIPE>) {
+ if (/\Qrule family="ipv4" source address="\E([\d.]+)\Q\/32" port port="$port" protocol="tcp" accept\E/) {
my $ip = $1;
my $keepopen = 0;
if (ref($iphost) eq 'HASH') {
if (exists($iphost->{$ip})) {
- $keepopen = 1;
+ $keepopen = 1;
}
}
unless ($keepopen) {
@@ -271,30 +429,76 @@ sub firewall_close_port {
close(PIPE);
}
if (keys(%to_close) > 0) {
- foreach my $ip (keys(%to_close)) {
- my $firewall_command =
- "$iptables -D $fw_chain -p tcp -s $ip -d 0/0 --dport $port -j ACCEPT";
- system($firewall_command);
- my $return_status = $?>>8;
- if ($return_status == 1) {
- push (@port_error,$ip);
- } elsif ($return_status == 2) {
- push(@command_error,$ip);
- } elsif ($return_status == 0) {
- push(@lond_port_close,$ip);
+ foreach my $ip (sort(keys(%to_close))) {
+ my $cmd = 'firewall-cmd --zone='.$zone.' --remove-rich-rule \'rule family="ipv4" source address="'.$ip.'/32" port port="'.$port.'" protocol="tcp" accept\'';
+ if (open(PIPE,"$cmd |")) {
+ my $result = <PIPE>;
+ chomp($result);
+ close(PIPE);
+ if ($result eq 'success') {
+ push(@lond_port_close,$ip);
+ } else {
+ push(@port_error,$ip);
+ }
+ } else {
+ push(@port_error,$ip);
}
}
}
if (@lond_port_close) {
- $output .= "Port closed for ".scalar(@lond_port_close)." IP addresses\n";
+ $output .= "Port closed for ".scalar(@lond_port_close)." IP addresses.\n";
}
if (@port_error) {
$output .= "Error closing port for following IP addresses: ".join(', ',@port_error)."\n";
}
- if (@command_error) {
- $output .= "Bad command error opening port for following IP addresses: ".
- join(', ',@command_error)."\n".
- 'Command was: "'."$iptables -D $fw_chain -p tcp -s ".'$ip'." -d 0/0 --dport $port -j ACCEPT".'", where $ip is IP address'."\n";
+ } else {
+ foreach my $fw_chain (@okchains) {
+ my (%to_close,@port_error,@command_error,@lond_port_close);
+ if (open(PIPE, "$iptables -n -L $fw_chain |")) {
+ while (<PIPE>) {
+ chomp();
+ next unless (/dpt:\Q$port\E/);
+ if (/^ACCEPT\s+tcp\s+\-{2}\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s+/) {
+ my $ip = $1;
+ my $keepopen = 0;
+ if (ref($iphost) eq 'HASH') {
+ if (exists($iphost->{$ip})) {
+ $keepopen = 1;
+ }
+ }
+ unless ($keepopen) {
+ $to_close{$ip} = $port;
+ }
+ }
+ }
+ close(PIPE);
+ }
+ if (keys(%to_close) > 0) {
+ foreach my $ip (keys(%to_close)) {
+ my $firewall_command =
+ "$iptables -D $fw_chain -p tcp -s $ip -d 0/0 --dport $port -j ACCEPT";
+ system($firewall_command);
+ my $return_status = $?>>8;
+ if ($return_status == 1) {
+ push(@port_error,$ip);
+ } elsif ($return_status == 2) {
+ push(@command_error,$ip);
+ } elsif ($return_status == 0) {
+ push(@lond_port_close,$ip);
+ }
+ }
+ }
+ if (@lond_port_close) {
+ $output .= "Port closed for ".scalar(@lond_port_close)." IP addresses.\n";
+ }
+ if (@port_error) {
+ $output .= "Error closing port for following IP addresses: ".join(', ',@port_error)."\n";
+ }
+ if (@command_error) {
+ $output .= "Bad command error opening port for following IP addresses: ".
+ join(', ',@command_error)."\n".
+ 'Command was: "'."$iptables -D $fw_chain -p tcp -s ".'$ip'." -d 0/0 --dport $port -j ACCEPT".'", where $ip is IP address'."\n";
+ }
}
}
if ($output) {
@@ -303,31 +507,59 @@ sub firewall_close_port {
print "No IP addresses required discontinuation of access.\n";
}
} else {
- foreach my $fw_chain (@okchains) {
- my (@port_error,@command_error,@lond_port_close);
+ if ($firewalld) {
my $to_close;
- if (open(PIPE, "$iptables -n -L $fw_chain |")) {
- while (<PIPE>) {
- chomp();
- next unless (/dpt:\Q$port\E\s*$/);
+ if (open(PIPE,"firewall-cmd --list-rich-rules |")) {
+ while(<PIPE>) {
+ next unless (/\Qrule family="ipv4" port port="$port" protocol="tcp" accept\E/);
$to_close = 1;
+ last;
}
close(PIPE);
}
if ($to_close) {
- my $firewall_command =
- "$iptables -D $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT";
- system($firewall_command);
- my $return_status = $?>>8;
- if ($return_status == 1) {
- # Error
- print "Error closing port for chain: $fw_chain.\n";
- } elsif ($return_status == 2) {
- # Bad command
- print "Bad command error closing port. Command was\n".
- " ".$firewall_command."\n";
+ my $cmd = 'firewall-cmd --zone='.$zone.' --remove-rich-rule \'rule family="ipv4" port port="'.$port.'" protocol="tcp" accept\'';
+ if (open(PIPE,"$cmd|")) {
+ my $result = <PIPE>;
+ chomp($result);
+ close(PIPE);
+ if ($result eq 'success') {
+ print "Port: $port closed in zone: $zone.\n";
+ } else {
+ print "Error closing port: $port in zone: $zone.\n";
+ }
} else {
- print "Port closed for chain $fw_chain.\n";
+ print "Error closing port: $port in zone: $zone.\n";
+ }
+ }
+ } else {
+ foreach my $fw_chain (@okchains) {
+ my (@port_error,@command_error,@lond_port_close);
+ my $to_close;
+ if (open(PIPE, "$iptables -n -L $fw_chain |")) {
+ while (<PIPE>) {
+ chomp();
+ next unless (/dpt:\Q$port\E/);
+ $to_close = 1;
+ last;
+ }
+ close(PIPE);
+ }
+ if ($to_close) {
+ my $firewall_command =
+ "$iptables -D $fw_chain -p tcp -d 0/0 --dport $port -j ACCEPT";
+ system($firewall_command);
+ my $return_status = $?>>8;
+ if ($return_status == 1) {
+ # Error
+ print "Error closing port: $port for chain: $fw_chain.\n";
+ } elsif ($return_status == 2) {
+ # Bad command
+ print "Bad command error closing port. Command was\n".
+ " ".$firewall_command."\n";
+ } else {
+ print "Port closed for chain $fw_chain.\n";
+ }
}
}
}
@@ -337,8 +569,47 @@ sub firewall_close_port {
}
sub firewall_close_anywhere {
- my ($iptables,$fw_chain,$port) = @_;
- if (open(PIPE, "$iptables --line-numbers -n -L $fw_chain |")) {
+ my ($iptables,$fw_chain,$port,$firewalld) = @_;
+ my $zone;
+ if ($firewalld) {
+ $zone = &get_default_zone();
+ if ($zone eq '') {
+ print 'no default zone';
+ return;
+ }
+ } else {
+ unless ($fw_chain =~ /^([\w\-]+)$/) {
+ print 'invalid chain';
+ return;
+ }
+ }
+ if ($firewalld) {
+ my $to_close;
+ my $cmd = 'firewall-cmd --list-ports';
+ if (open(PIPE,"$cmd |")) {
+ my $currports = <PIPE>;
+ close(PIPE);
+ chomp($currports);
+ if (grep(/^\Q$port\E\/tcp/,split(/\s+/,$currports))) {
+ $to_close = 1;
+ }
+ }
+ if ($to_close) {
+ my $cmd = 'firewall-cmd --zone='.$zone.' --remove-port='.$port.'/tcp';
+ if (open(PIPE,"$cmd |")) {
+ my $result = <PIPE>;
+ chomp($result);
+ close(PIPE);
+ if ($result eq 'success') {
+ print 'Port '.$port.' closed for source "anywhere"'."\n";
+ } else {
+ print 'Error closing port '.$port.' for source "anywhere".'."\n";
+ }
+ } else {
+ print 'Error closing port '.$port.' for source "anywhere".'."\n";
+ }
+ }
+ } elsif (open(PIPE, "$iptables --line-numbers -n -L $fw_chain |")) {
while (<PIPE>) {
next unless (/dpt:\Q$port\E/);
chomp();
@@ -347,7 +618,7 @@ sub firewall_close_anywhere {
system($firewall_command);
my $return_status = $?>>8;
if ($return_status == 1) {
- print 'Error closing port '.$port.' for source "anywhere"'."\n";
+ print 'Error closing port '.$port.' for source "anywhere".'."\n";
} elsif ($return_status == 2) {
print 'Bad command error closing port '.$port.' for source "anywhere". Command was'."\n".
' '.$firewall_command."\n";
@@ -375,12 +646,28 @@ sub get_lond_port {
}
sub get_fw_chains {
- my ($iptables) = @_;
- my $distro = &LONCAPA::distro();
+ my ($iptables,$distro) = @_;
+ if ($distro eq '') {
+ $distro = &get_distro();
+ }
my @fw_chains;
my $suse_config = "/etc/sysconfig/SuSEfirewall2";
my $ubuntu_config = "/etc/ufw/ufw.conf";
- if (-e $suse_config) {
+ my $firewalld = &uses_firewalld($distro);
+ if ($firewalld) {
+ my ($dist,$version) = ($distro =~ /^([\D]+)(\d+)$/);
+ if (((($dist eq 'rhes') || ($dist eq 'centos') || ($dist eq 'rocky') || ($dist eq 'alma')) &&
+ ($version >= 8)) || (($dist eq 'oracle') && ($version >= 7))) {
+ push(@fw_chains,'INPUT');
+ } else {
+ my $zone = &get_default_zone();
+ if ($zone ne '') {
+ push(@fw_chains,'IN_'.$zone.'_allow');
+ } else {
+ push(@fw_chains,'IN_public_allow');
+ }
+ }
+ } elsif (-e $suse_config) {
push(@fw_chains,'input_ext');
} else {
my @posschains;
@@ -389,17 +676,23 @@ sub get_fw_chains {
} else {
if ($distro =~ /^(debian|ubuntu|suse|sles)/) {
@posschains = ('INPUT');
- } else {
- @posschains = ('RH-Firewall-1-INPUT','INPUT');
+ } elsif ($distro =~ /^(fedora|rhes|centos|scientific|oracle|rocky|alma)(\d+)$/) {
+ if ((($1 eq 'fedora') && ($2 > 15)) || (($1 ne 'fedora') && ($2 >= 7))) {
+ @posschains = ('INPUT');
+ } else {
+ @posschains = ('RH-Firewall-1-INPUT','INPUT');
+ }
}
if (!-e '/etc/sysconfig/iptables') {
if (!-e '/var/lib/iptables') {
unless ($distro =~ /^(debian|ubuntu)/) {
- print("Unable to find iptables file containing static definitions\n");
+ print("Unable to find iptables file containing static definitions.\n");
}
}
- if ($distro =~ /^(fedora|rhes|centos|scientific)/) {
- push(@fw_chains,'RH-Firewall-1-INPUT');
+ if ($distro =~ /^(fedora|rhes|centos|scientific|oracle|rocky|alma)(\d+)$/) {
+ unless ((($1 eq 'fedora') && ($2 > 15)) || (($1 ne 'fedora') && ($2 >= 7))) {
+ push(@fw_chains,'RH-Firewall-1-INPUT');
+ }
}
}
}
@@ -428,6 +721,18 @@ sub get_fw_chains {
return @fw_chains;
}
+sub get_default_zone {
+ my $cmd = 'firewall-cmd --get-default-zone';
+ my $zone;
+ if (open(PIPE,"$cmd |")) {
+ my $result = <PIPE>;
+ chomp($result);
+ close(PIPE);
+ ($zone) = ($result =~ /^(\w+)$/);
+ }
+ return $zone;
+}
+
sub get_pathto_iptables {
my $iptables;
if (-e '/sbin/iptables') {
@@ -435,11 +740,20 @@ sub get_pathto_iptables {
} elsif (-e '/usr/sbin/iptables') {
$iptables = '/usr/sbin/iptables';
} else {
- print("Unable to find iptables command\n");
+ print("Unable to find iptables command.\n");
}
return $iptables;
}
+sub get_distro {
+ my $distro;
+ if (open(PIPE,"/home/httpd/perl/distprobe |")) {
+ $distro = <PIPE>;
+ close(PIPE);
+ }
+ return $distro;
+}
+
1;
__END__
@@ -454,6 +768,7 @@ B<LONCAPA::Firewall> - dynamic opening/c
use lib '/home/httpd/lib/perl/';
use LONCAPA::Firewall;
+ LONCAPA::Firewall::uses_firewalld();
LONCAPA::Firewall::firewall_open_port();
LONCAPA::Firewall::firewall_close_port();
LONCAPA::Firewall::firewall_is_port_open();
@@ -473,19 +788,25 @@ The following methods are available:
=over 4
-=item LONCAPA::Firewall::firewall_open_port( $iptables,$fw_chains,$lond_port,$iphost,$port );
+=item LONCAPA::Firewall::uses_firewalld( $distro );
+
+=back
+
+=over 4
+
+=item LONCAPA::Firewall::firewall_open_port( $iptables,$fw_chains,$lond_port,$iphost,$ports,$firewalld );
=back
=over 4
-=item LONCAPA::Firewall::firewall_close_port( $iptables,$fw_chains,$lond_port,$iphost,$ports );
+=item LONCAPA::Firewall::firewall_close_port( $iptables,$fw_chains,$lond_port,$iphost,$ports,$firewalld );
=back
=over 4
-=item LONCAPA::Firewall::firewall_is_port_open( $iptables,$fw_chain,$port,$lond_port,$iphost,$curropen );
+=item LONCAPA::Firewall::firewall_is_port_open( $iptables,$fw_chain,$port,$lond_port,$iphost,$curropen,$firewalld );
=back
@@ -497,7 +818,7 @@ The following methods are available:
=over 4
-=item LONCAPA::Firewall::firewall_close_anywhere( $iptables,$fw_chain,$port );
+=item LONCAPA::Firewall::firewall_close_anywhere( $iptables,$fw_chain,$port,$firewalld );
=back
@@ -509,7 +830,7 @@ The following methods are available:
=over 4
-=item LONCAPA::Firewall::get_fw_chains();
+=item LONCAPA::Firewall::get_fw_chains( $iptables,$distro );
=back
@@ -517,6 +838,13 @@ The following methods are available:
=item LONCAPA::Firewall::get_pathto_iptables();
+=back
+
+=over 4
+
+=item LONCAPA::Firewall::get_distro();
+
+=back
=head1 AUTHORS