use strict;
use warnings;
+#Load IPC::System::Simple
use IPC::System::Simple qw(capturex);
-use Data::Validate::IP;
+#Load Data::Validate::IP
+use Data::Validate::IP qw(is_ipv4 is_ipv6);
+
+#Load NetAddr::IP::Util
+use NetAddr::IP::Util qw(shiftleft inet_4map6 ipv4to6);
+
+#Load NetAddr::IP
+use NetAddr::IP qw(:nofqdn Ones);
+
+#Load POSIX
+use POSIX qw(EXIT_SUCCESS EXIT_FAILURE);
+
+#IP v4 hash
my %ip4s = ();
+#IP v6 hash
my %ip6s = ();
+#Blacklist v4 array
my @blrule4s = ();
+#Blacklist v6 array
my @blrule6s = ();
-my $whitelist = qr/^(?:127.|85.68.182.45|195.25.233.49|94.23.226.160|::1|2001:41d0:2:65a0:)/;
+
+#Init block list
+my $blocklist = 0;
+
+#Init spam list
+my $spamlist = 1;
+
+#Filter options
+@ARGV = map {
+ if ($_ eq '-b' || $_ eq '--blocklist') {
+ $blocklist = 1; ();
+ } elsif ($_ eq '-nb' || $_ eq '--noblocklist') {
+ $blocklist = 0; ();
+ } elsif ($_ eq '-s' || $_ eq '--spamlist') {
+ $spamlist = 1; ();
+ } elsif ($_ eq '-ns' || $_ eq '--nospamlist') {
+ $spamlist = 0; ();
+ } else {
+ $_;
+ }
+} @ARGV;
+
+#Show usage with invalid argument
+if (scalar(@ARGV)) {
+ print "Usage: $0 [-b|--blocklist|-nb|--noblocklist|-s|--spamlist|-ns|--nospamlist]\n";
+ exit EXIT_FAILURE;
+}
+
+#TODO: add google/microsoft/etc mail range ?
+
+#TODO: add all configuration in a json config ?
+
+#IP whitelist
+#my $iplist = qr/^(?:127\.|::1|2a01:4f8:190:22a6:|5\.9\.143\.173|85\.68\.|81\.67\.|89\.157\.|82\.241\.255\.46)/;
+my %iplist = (
+ ipv4 => [
+ #Localhost
+ '127.0.0.0/8',
+ #Aurae
+ '144.76.27.210/32',
+ #Toulouse
+ '82.241.255.46/32',
+ #Akasha
+ #'89.157.132.244/32'
+ #'89.3.145.115/32'
+ '89.3.147.209/32',
+ #Ygg tracker (tracker.yggtracker.cc)
+ '31.220.0.116/32',
+ #Coppersurfer tracker (tracker.coppersurfer.tk)
+ '31.14.40.30/32',
+ #Pussytorrent tracker (tracker.pussytorrents.org)
+ '217.23.12.105/32'
+ ],
+ ipv6 => [
+ #Localhost
+ '::1/32',
+ #Aurae
+ '2a01:4f8:191:1405::/64'
+ ]
+);
+
+#Create a new NetAddr::IP object without calling slow gethostbyname (load /etc/resolv.conf)
+sub new_ipv4($) {
+ #Extract ip and mask
+ my ($ip, $mask) = split('/', shift);
+ #Build base struct
+ my $self = {
+ #Set mask
+ mask => !defined($mask)||$mask==32?Ones:shiftleft(Ones, 32 - $mask),
+ #Mark as ipv4
+ isv6 => 0,
+ #Generate fake address
+ #XXX: NetAddr::IP expect a faked Socket6 gethostbyname struct
+ #XXX: see /usr/lib64/perl5/vendor_perl/NetAddr/IP/Util.pm +235
+ addr => inet_4map6(ipv4to6(pack('C4', split('\.', $ip))))
+ };
+ #Return fake NetAddr::IP object
+ return bless $self, 'NetAddr::IP';
+}
+
+#User whitelist
my @userlist = ('rapsys');
-# Extract sshd.service scan
+#Extract sshd.service scan
+#map {
+# #Extract user and ip
+# if (/Failed password for (?:invalid user )?(.+) from (.+) port [0-9]+ ssh2/ && grep($_ ne $1, @userlist)) {
+# #Save ip
+# my $ip = $2;
+# #Check if v4 ip and not in whitelist
+# if (is_ipv4($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv4}}) {
+# #Add ip in v4 blacklist
+# $ip4s{$ip}=1;
+# #Check if v6 ip
+# } elsif (is_ipv6($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv6}}) {
+# $ip6s{$ip}=1;
+# }
+# }
+#} capturex('journalctl', '-u', 'sshd.service');
+
+#Extract kernel port scan
map {
- if (/Failed password for (?:invalid user )?(.+) from (.+) port [0-9]+ ssh2/ && grep($_ ne $1, @userlist) && $2 !~ /$whitelist/) {
- if (Data::Validate::IP::is_ipv4($2)) {
- $ip4s{$2}=1;
- } elsif (Data::Validate::IP::is_ipv6($2)) {
- $ip6s{$2}=1;
+ #oct. 04 19:10:30 aurae.aoihime.eu kernel: net-fw DROP IN=enp3s0 OUT= MAC=50:46:5d:a1:a1:85:0c:86:10:f5:c6:4b:08:00 SRC=61.227.52.153 DST=144.76.27.210 LEN=52 TOS=0x00 PREC=0x00 TTL=116 ID=29123 DF PROTO=TCP SPT=64349 DPT=445 WINDOW=8192 RES=0x00 SYN URGP=0
+ #net-fw DROP IN=enp3s0 OUT= MAC=50:46:5d:a1:a1:85:0c:86:10:f5:c6:4b:08:00 SRC=110.34.70.110 DST=144.76.27.210 LEN=40 TOS=0x00 PREC=0x00 TTL=50 ID=17488 PROTO=TCP SPT=58225 DPT=34567 WINDOW=53283 RES=0x00 SYN URGP=0
+ if (/net-fw DROP .* SRC=([^\s]+) .* PROTO=([^\s]+) .* DPT=([^\s]+)/) {
+ #Save ip
+ my $ip = $1;
+ #Save proto
+ my $proto = lc($2);
+ #Save dpt
+ my $dpt = $3;
+ #Check if v4 ip and not in whitelist
+ #if (is_ipv4($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv4}}) {
+ if (is_ipv4($ip) && not scalar map { my $network = new_ipv4($_); my $netip = new_ipv4($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv4}}) {
+ if (!defined $ip4s{$ip}) {
+ %{$ip4s{$ip}} = ('tcp' => {}, 'udp' => {});
+ }
+ #Add ip in v4 blacklist
+ $ip4s{$ip}{$proto}{$dpt}=1;
+ } elsif (is_ipv6($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv6}}) {
+ if (!defined $ip6s{$ip}) {
+ %{$ip6s{$ip}} = ('tcp' => {}, 'udp' => {});
+ }
+ #Add ip in v6 blacklist
+ $ip6s{$ip}{$proto}{$dpt}=1;
+ }
+ #oct. 04 19:17:10 aurae.aoihime.eu kernel: audit: type=1100 audit(1570209430.543:17321294): pid=5890 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:authentication grantors=? acct="root" exe="/usr/sbin/sshd" hostname=195.154.112.70 addr=195.154.112.70 terminal=ssh res=failed'
+ #audit: type=1100 audit(1570291573.615:8660): pid=3225 uid=0 auid=4294967295 ses=4294967295 msg='op=PAM:authentication grantors=? acct="root" exe="/usr/sbin/sshd" hostname=222.186.180.9 addr=222.186.180.9 terminal=ssh res=failed'
+ } elsif (/op=PAM:authentication grantors=\? acct="(.+)" exe="\/usr\/(?:libexec\/dovecot\/auth|sbin\/sshd)" hostname=.+ addr=(.+) terminal=(dovecot|ssh) res=failed/ && grep($_ ne $1, @userlist)) {
+ #Save ip
+ my $ip = $2;
+ #Init blacklist
+ my %blacklist = ('tcp' => [], 'udp' => []);
+ #Set ssh proto and port tuple
+ if ($3 eq 'ssh') {
+ #Set blacklist for 22 dest port on tcp
+ #$blacklist{'tcp'}[$#{$blacklist{'tcp'}}+1] = 22;
+ %blacklist = ('tcp' => [ 22 ]);
+ #Set dovecot proto and port tuples
+ } elsif ($3 eq 'dovecot') {
+ #Set blacklist for 25, 143, 587, 993 dest ports on tcp and udp
+ %blacklist = ('tcp' => [ 25, 143, 587, 993 ], 'udp' => [ 25, 143, 587, 993 ]);
+ #Set other proto and port tuples
+ } else {
}
+
+ #Check if v4 ip and not in whitelist
+ if (is_ipv4($ip) && not scalar map { my $network = new_ipv4($_); my $netip = new_ipv4($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv4}}) {
+ if (!defined $ip4s{$ip}) {
+ %{$ip4s{$ip}} = ('tcp' => {}, 'udp' => {});
+ }
+ #Add ip tuples in v4 blacklist
+ map { my $proto = $_; map { $ip4s{$ip}{$proto}{$_}=1; } @{$blacklist{$proto}}; } keys %blacklist;
+ #Check if v6 ip
+ } elsif (is_ipv6($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv6}}) {
+ if (!defined $ip6s{$ip}) {
+ %{$ip6s{$ip}} = ('tcp' => {}, 'udp' => {});
+ }
+ #Add ip tuples in v6 blacklist
+ map { my $proto = $_; map { $ip6s{$ip}{$proto}{$_}=1; } @{$blacklist{$proto}}; } keys %blacklist;
+ }
+ #nov. 30 15:30:07 aurae.aoihime.eu kernel: audit: type=1100 audit(1575124207.371:38129): pid=685 uid=985 auid=4294967295 ses=4294967295 msg='op=PAM:authentication grantors=? acct="toto" exe="/usr/bin/pwauth" hostname=? addr=? terminal=? res=failed'
+ #XXX: Until mod_authnz pass to pwauth the (SERVER_NAME|SERVER_ADDR) + REMOTE_ADDR+REMOTE_PORT in env it's impossible to know who did a failed auth
+ #XXX: see https://github.com/phokz/mod-auth-external/blob/master/mod_authnz_external/TODO
+ #} elsif (/op=PAM:authentication grantors=\? acct="(.+)" exe="\/usr\/bin\/pwauth" hostname=.+ addr=(.+) terminal=\? res=failed/ && grep($_ ne $1, @userlist)) {
+ # ...
}
-} capturex('journalctl', '-u', 'sshd.service');
+} capturex('journalctl', '-m', '-t', 'kernel', '-o', 'cat', '--no-hostname');
+
+#With spamlist
+if ($spamlist) {
+ #Extract originating ip in spam
+ map {
+ #Open spam file for reading
+ open (my $fh, '<', $_) or die "Can't open < $_: $!";
-# Extract kernel port scan
+ #Lookup for X-Originating-IP header
+ while (<$fh>) {
+ if (/X-Originating-IP: (.+)$/) {
+ #Set ip
+ my $ip = ${1};
+
+ #Set blacklist for 80 and 443 dest ports on tcp
+ my %blacklist = ('tcp' => [ 80, 443, 8000, 8080, 8443 ]);
+
+ #Check if v4 ip and not in whitelist
+ #if (is_ipv4($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv4}}) {
+ if (is_ipv4($ip) && not scalar map { my $network = new_ipv4($_); my $netip = new_ipv4($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv4}}) {
+ if (!defined $ip4s{$ip}) {
+ %{$ip4s{$ip}} = ('tcp' => {}, 'udp' => {});
+ }
+ #Add ip tuples in v4 blacklist
+ map { my $proto = $_; map { $ip4s{$ip}{$proto}{$_}=1; } @{$blacklist{$proto}}; } keys %blacklist;
+ } elsif (is_ipv6($ip) && not scalar map { my $network = NetAddr::IP->new($_); my $netip = NetAddr::IP->new($ip); unless ($network->contains($netip)) { (); } } @{$iplist{ipv6}}) {
+ if (!defined $ip6s{$ip}) {
+ %{$ip6s{$ip}} = ('tcp' => {}, 'udp' => {});
+ }
+ #Add ip tuples in v6 blacklist
+ map { my $proto = $_; map { $ip6s{$ip}{$proto}{$_}=1; } @{$blacklist{$proto}}; } keys %blacklist;
+ }
+ }
+ }
+
+ #Close spam file
+ close $fh or die "Can't close fh: $!";
+ } glob('/var/spool/mail/*/.Junk/{new,cur,tmp}/*');
+}
+
+#Process each ipv4s keys
+map {
+ #Set proto as either tcp or udp
+ for my $proto (('tcp', 'udp')) {
+ #Check if branch is empty
+ if (!scalar keys %{$ip4s{$_}{$proto}}) {
+ #Prune it
+ delete $ip4s{$_}{$proto};
+ }
+ }
+} keys %ip4s;
+
+#Process each ipv6s keys
map {
- if (/Shorewall:net-fw:DROP:.* SRC=([^\s]+) DST=.*/ && $1 !~ /$whitelist/) {
- if (Data::Validate::IP::is_ipv4($1)) {
- $ip4s{$1}=1;
- } elsif (Data::Validate::IP::is_ipv6($1)) {
- $ip6s{$1}=1;
+ #Set proto as either tcp or udp
+ for my $proto (('tcp', 'udp')) {
+ #Check if branch is empty
+ if (!scalar keys %{$ip6s{$_}{$proto}}) {
+ #Prune it
+ delete $ip6s{$_}{$proto};
}
}
-} capturex('journalctl', '-k');
+} keys %ip6s;
-# Open blrule4s file for reading
+#Open blrule4s file for reading
open (my $fh, '<', '/etc/shorewall/blrules') or die "Can't open < /etc/shorewall/blrules: $!";
-# Populate with comments
+#Populate with comments
@blrule4s = map { chomp($_); if (/^#/) { $_; } else { (); } } <$fh>;
-# Prepend header
-push @blrule4s, "WHITELIST\tnet:85.68.182.45\tall";
-push @blrule4s, "WHITELIST\tnet:94.23.226.160\tall";
-push @blrule4s, "WHITELIST\tnet:195.25.233.49\tall";
+#Prepend each specific ip from whitelist
+map { push @blrule4s, "WHITELIST\tnet:$1\tall" if (/^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\/32$/); } @{$iplist{ipv4}};
-# Build blacklist
-map { push @blrule4s, "DROP\t\tnet:".$_.(length lt 12?"\t":'')."\tfw"; } sort keys %ip4s;
-
-# Close blrule4s file
+#Close blrule4s file
close $fh or die "Can't close fh: $!";
-# Open blrule4s file for writing
+#With blocklist
+if ($blocklist) {
+ #Open bt_blocklists.ipv4 file for reading
+ open ($fh, '<', '/usr/local/share/blacklist/shorewall.ipv4') or die "Can't open < /usr/local/share/blacklist/shorewall.ipv4: $!";
+
+ #Prepend bt_blocklists.ipv4 drop
+ map { chomp $_; push @blrule4s, "DROP\t\tnet:$_\tfw"; } <$fh>;
+
+ #Close bt_blocklists.ipv4 file
+ close $fh or die "Can't close fh: $!";
+}
+
+#Build blacklist
+map {
+ #Set proto from hash
+ for my $proto (sort keys %{$ip4s{$_}}) {
+ #Push rule
+ push @blrule4s, "DROP\t\tnet:".$_.(length($_)<12?"\t":'')."\tfw\t$proto\t".(scalar keys %{$ip4s{$_}{$proto}}>5||defined $ip4s{$_}{$proto}{0}?'#':'').join(",", sort { $a <=> $b } keys %{$ip4s{$_}{$proto}});
+ }
+} sort keys %ip4s;
+
+#Open blrule4s file for writing
open ($fh, '>', '/etc/shorewall/blrules') or die "Can't open > /etc/shorewall/blrules: $!";
-# Inject content of blacklist
+#Inject content of blacklist
map { print $fh $_."\n"; } @blrule4s;
-# Close blrule4s file
+#Close blrule4s file
close $fh or die "Can't close fh: $!";
-# Print ipv6 to update hash
+#Print ipv6 to update hash
#XXX; right now it don't seems scanned at all...
for (sort keys %ip6s) {
- print $_."\n";
+ #Set proto from hash
+ for my $proto (keys %{$ip6s{$_}}) {
+ #Print the ipv6 scanner
+ print $_."\t$proto\t".join(",", keys %{$ip6s{$_}{$proto}})."\n";
+ }
}
-# Restart shorewall service
+#TODO: add ipv6 ?
+
+#Restart shorewall service
capturex('systemctl', 'restart', 'shorewall.service');
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