Newer
Older
################################################################
###### Script to check Blocklist.de list. Block new IP ######
###### and unblock deleted entrys ######
################################################################
## config ##
my $listUrl = "http://lists.blocklist.de/lists/all.txt";
my $fileName = "Blocklist.txt";
my $tmpDir = "/tmp";
my $file = "$tmpDir/$fileName";
my $whiteList = "whitelist.txt";
my $blackList = "blacklist.txt";
## binarys ##
my $iptables = "/sbin/iptables";
my $ipset = "/usr/sbin/ipset";
my $grep = "/bin/grep";
my $rm = "/bin/rm";
my $wget = "/usr/bin/wget";
## plain variables ##
my($row, $Blocklist, $line, $check, $checkLine, $result, $output, $ipRegex, $message);
my ($added, $removed, $skipped);
$added = $removed = $skipped = 0;
## init arrays ##
my @fileArray = ();
my @ipsetArray = ();
my @whiteListArray = ();
my @blackListArray = ();
my $dateTime;
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime();
my @months = qw( Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec );
my @days = qw(Sun Mon Tue Wed Thu Fri Sat Sun);
#****************************#
#*********** MAIN ***********#
#****************************#
&addIpsToBlocklist();
&remIpsFromBlocklist();
&cleanup();
exit;
#***** END MAIN *****#
#****************************#
#******* Subroutines ********#
#****************************#
############# iptablesCheck ###############
## checks if all necessary ##
## iptable/ipset Settings have been set ##
###########################################
sub iptablesCheck {
## Do we have an BLOCKLIST/DROP Chain?
if (`$iptables -L -n | $grep BLOCKLIST` =~ m/Chain BLOCKLIST/) {
} else {
$message = "Creating Chain BLOCKLIST";
logging($message);
`$iptables -N BLOCKLIST`;
`$iptables -A BLOCKLIST -m limit --limit 2/min -j LOG --log-prefix "Blocklist Dropped: " --log-level 4`;
`$iptables -A BLOCKLIST -j DROP`;
}
## Do we have an ipset list called blocklist?
if(`$ipset list -n | $grep blocklist` =~ m/blocklist/) {
} else {
`$ipset create blocklist hash:ip hashsize 4096`;
$message = "Created ipset list blocklist";
logging($message);
}
## Is there an forwarded from INPUT to BLOCKLIST?
if (`$iptables -L INPUT | $grep BLOCKLIST`=~ m/BLOCKLIST/) {
} else {
`$iptables -I INPUT -m set --match-set blocklist src -j BLOCKLIST`;
$message = "Creating forward to BLOCKLIST chain";
logging($message);
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
}
}
######## END iptablesCheck ########
########## getFileArray #############
## downloads the Blocklist.txt and ##
## pushes it into an array ##
#####################################
sub getFileArray {
`$wget -q -O $tmpDir/$fileName $listUrl && echo "Downloaded temp file to $tmpDir/$fileName" || echo "Can not download file.... stopping"`;
open(INFO, $file) or die("Could not open file.");
foreach $line (<INFO>) {
push(@fileArray, $line);
}
close(INFO);
chomp(@fileArray);
%fileArray = map {$_ => 1 } @fileArray;
}
####### END getFileArray ##########
######### getIpsetArray ##########
## runs ipset list blocklist ##
## and pushes it into ##
## array ipsetList ##
##################################
sub getIpsetArray {
$output = `$ipset list blocklist`;
@ipsetArray = split("\n", $output);
#remove the first 6 Elements of our Array using splice (ipset header info)
splice @ipsetArray, 0, 6;
%ipsetArray = map { $_ => 1} split("\n", $output);
}
##### END getIpsetArray #########
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
######### getWhiteListArray ######
## puts all ips from our ##
## $whitelist into ##
## array whiteListArray ##
##################################
sub getWhiteListArray {
open(INFO, $whiteList) or die("Could not open Whitelist.");
foreach $line (<INFO>) {
push(@whiteListArray, $line);
}
close(INFO);
chomp(@whiteListArray);
}
##### END getWhiteListArray #####
######### getBlackListArray ######
## puts all ips from our ##
## $whitelist into ##
## array blackListArray ##
##################################
sub getBlackListArray {
open(INFO, $blackList) or die("Could not open Blacklist.");
foreach $line (<INFO>) {
push(@blackListArray, $line);
}
close(INFO);
chomp(@blackListArray);
}
##### END getBlackListArray #####
######## addIpsToBlocklist ######
## adds IPs to our blocklist ##
#################################
sub addIpsToBlocklist {
foreach $line (@blackListArray) {
if ((exists $ipsetArray{"$line"}) || ($line ~~ @whiteListArray)) {
$skipped++;
} else {
if ($line eq &isIpv4($line)) {
$result = `$ipset add blocklist $line`;
$added++;
$message = "added $line";
logging($message);
} else {
$skipped++;
}
}
}
if ((exists $ipsetArray{"$line"}) || ($line ~~ @whiteListArray)) {
$skipped++;
} else {
if ($line eq &isIpv4($line)) {
$result = `$ipset add blocklist $line`;
$added++;
$message = "added $line";
logging($message);
} else {
$skipped++;
}
}
}
}
######## END addIpsToBlocklist ######
########## remIpsFromBlocklist ########
## remove IPs from our blocklist ##
#####################################
sub remIpsFromBlocklist {
# remove Ips that are in our whiteList
foreach $line (@whiteListArray) {
if ((exists $ipsetArray{"$line"}) && ($line ~~ @whiteListArray)) {
if ($line eq &isIpv4($line)) {
$result = `$ipset del blocklist $line`;
$message = "removed $line";
logging($message);
$removed++;
} else {
$skipped++;
}
}
}
if ((exists $fileArray{"$line"}) || ($line ~~ @blackListArray)) {
$skipped++;
} else {
if ($line eq &isIpv4($line)) {
$result = `$ipset del blocklist $line`;
$message = "removed $line";
logging($message);
$removed++;
} else {
$skipped++;
}
}
}
}
######## END remIpsFromBlocklist ########
################## cleanup ###################
#### Cleanup: move tmp file to new place #####
##############################################
sub cleanup {
$result = `$rm $tmpDir/$fileName && echo "Deleted file $tmpDir/$fileName" || echo "Can\t delete file $tmpDir/$fileName"`;
$message = "We added $added, removed $removed, skipped $skipped Rules";
logging($message);
}
############### END cleanup ######################
############ isIpv4 #############
## check if given value looks ##
## like an ipv4 ip address ##
#################################
sub isIpv4 {
my ($isIp) = @_;
if ($isIp =~ m/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/) {
#print "It's an IPv4\n";
return $isIp;
} else {
return 0;
}
}
######### END isIpv4 ##########
###### log #######
## log $message ##
##################
sub logging {
my ($message) = @_;
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime();
open my $fh, ">>", $logFile
or die "Can't open logfile: $!";
$dateTime = sprintf("$months[$mon] %02d %02d:%02d:%02d ", $mday,$hour,$min,$sec);
print $fh "$dateTime $message\n";
print "$message\n";
close($fh);
}
#### end log #####