Merge tag 'upstream/1.20'
Upstream version 1.20
This commit is contained in:
commit
67eb609f53
281
LICENSE
Normal file
281
LICENSE
Normal file
|
@ -0,0 +1,281 @@
|
|||
GNU GENERAL PUBLIC LICENSE
|
||||
Version 2, June 1991
|
||||
|
||||
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
||||
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
Preamble
|
||||
|
||||
The licenses for most software are designed to take away your
|
||||
freedom to share and change it. By contrast, the GNU General Public
|
||||
License is intended to guarantee your freedom to share and change free
|
||||
software--to make sure the software is free for all its users. This
|
||||
General Public License applies to most of the Free Software
|
||||
Foundation's software and to any other program whose authors commit to
|
||||
using it. (Some other Free Software Foundation software is covered by
|
||||
the GNU Library General Public License instead.) You can apply it to
|
||||
your programs, too.
|
||||
|
||||
When we speak of free software, we are referring to freedom, not
|
||||
price. Our General Public Licenses are designed to make sure that you
|
||||
have the freedom to distribute copies of free software (and charge for
|
||||
this service if you wish), that you receive source code or can get it
|
||||
if you want it, that you can change the software or use pieces of it
|
||||
in new free programs; and that you know you can do these things.
|
||||
|
||||
To protect your rights, we need to make restrictions that forbid
|
||||
anyone to deny you these rights or to ask you to surrender the rights.
|
||||
These restrictions translate to certain responsibilities for you if you
|
||||
distribute copies of the software, or if you modify it.
|
||||
|
||||
For example, if you distribute copies of such a program, whether
|
||||
gratis or for a fee, you must give the recipients all the rights that
|
||||
you have. You must make sure that they, too, receive or can get the
|
||||
source code. And you must show them these terms so they know their
|
||||
rights.
|
||||
|
||||
We protect your rights with two steps: (1) copyright the software, and
|
||||
(2) offer you this license which gives you legal permission to copy,
|
||||
distribute and/or modify the software.
|
||||
|
||||
Also, for each author's protection and ours, we want to make certain
|
||||
that everyone understands that there is no warranty for this free
|
||||
software. If the software is modified by someone else and passed on, we
|
||||
want its recipients to know that what they have is not the original, so
|
||||
that any problems introduced by others will not reflect on the original
|
||||
authors' reputations.
|
||||
|
||||
Finally, any free program is threatened constantly by software
|
||||
patents. We wish to avoid the danger that redistributors of a free
|
||||
program will individually obtain patent licenses, in effect making the
|
||||
program proprietary. To prevent this, we have made it clear that any
|
||||
patent must be licensed for everyone's free use or not licensed at all.
|
||||
|
||||
The precise terms and conditions for copying, distribution and
|
||||
modification follow.
|
||||
|
||||
GNU GENERAL PUBLIC LICENSE
|
||||
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
|
||||
|
||||
0. This License applies to any program or other work which contains
|
||||
a notice placed by the copyright holder saying it may be distributed
|
||||
under the terms of this General Public License. The "Program", below,
|
||||
refers to any such program or work, and a "work based on the Program"
|
||||
means either the Program or any derivative work under copyright law:
|
||||
that is to say, a work containing the Program or a portion of it,
|
||||
either verbatim or with modifications and/or translated into another
|
||||
language. (Hereinafter, translation is included without limitation in
|
||||
the term "modification".) Each licensee is addressed as "you".
|
||||
|
||||
Activities other than copying, distribution and modification are not
|
||||
covered by this License; they are outside its scope. The act of
|
||||
running the Program is not restricted, and the output from the Program
|
||||
is covered only if its contents constitute a work based on the
|
||||
Program (independent of having been made by running the Program).
|
||||
Whether that is true depends on what the Program does.
|
||||
|
||||
1. You may copy and distribute verbatim copies of the Program's
|
||||
source code as you receive it, in any medium, provided that you
|
||||
conspicuously and appropriately publish on each copy an appropriate
|
||||
copyright notice and disclaimer of warranty; keep intact all the
|
||||
notices that refer to this License and to the absence of any warranty;
|
||||
and give any other recipients of the Program a copy of this License
|
||||
along with the Program.
|
||||
|
||||
You may charge a fee for the physical act of transferring a copy, and
|
||||
you may at your option offer warranty protection in exchange for a fee.
|
||||
|
||||
2. You may modify your copy or copies of the Program or any portion
|
||||
of it, thus forming a work based on the Program, and copy and
|
||||
distribute such modifications or work under the terms of Section 1
|
||||
above, provided that you also meet all of these conditions:
|
||||
|
||||
a) You must cause the modified files to carry prominent notices
|
||||
stating that you changed the files and the date of any change.
|
||||
|
||||
b) You must cause any work that you distribute or publish, that in
|
||||
whole or in part contains or is derived from the Program or any
|
||||
part thereof, to be licensed as a whole at no charge to all third
|
||||
parties under the terms of this License.
|
||||
|
||||
c) If the modified program normally reads commands interactively
|
||||
when run, you must cause it, when started running for such
|
||||
interactive use in the most ordinary way, to print or display an
|
||||
announcement including an appropriate copyright notice and a
|
||||
notice that there is no warranty (or else, saying that you provide
|
||||
a warranty) and that users may redistribute the program under
|
||||
these conditions, and telling the user how to view a copy of this
|
||||
License. (Exception: if the Program itself is interactive but
|
||||
does not normally print such an announcement, your work based on
|
||||
the Program is not required to print an announcement.)
|
||||
|
||||
These requirements apply to the modified work as a whole. If
|
||||
identifiable sections of that work are not derived from the Program,
|
||||
and can be reasonably considered independent and separate works in
|
||||
themselves, then this License, and its terms, do not apply to those
|
||||
sections when you distribute them as separate works. But when you
|
||||
distribute the same sections as part of a whole which is a work based
|
||||
on the Program, the distribution of the whole must be on the terms of
|
||||
this License, whose permissions for other licensees extend to the
|
||||
entire whole, and thus to each and every part regardless of who wrote it.
|
||||
|
||||
Thus, it is not the intent of this section to claim rights or contest
|
||||
your rights to work written entirely by you; rather, the intent is to
|
||||
exercise the right to control the distribution of derivative or
|
||||
collective works based on the Program.
|
||||
|
||||
In addition, mere aggregation of another work not based on the Program
|
||||
with the Program (or with a work based on the Program) on a volume of
|
||||
a storage or distribution medium does not bring the other work under
|
||||
the scope of this License.
|
||||
|
||||
3. You may copy and distribute the Program (or a work based on it,
|
||||
under Section 2) in object code or executable form under the terms of
|
||||
Sections 1 and 2 above provided that you also do one of the following:
|
||||
|
||||
a) Accompany it with the complete corresponding machine-readable
|
||||
source code, which must be distributed under the terms of Sections
|
||||
1 and 2 above on a medium customarily used for software interchange; or,
|
||||
|
||||
b) Accompany it with a written offer, valid for at least three
|
||||
years, to give any third party, for a charge no more than your
|
||||
cost of physically performing source distribution, a complete
|
||||
machine-readable copy of the corresponding source code, to be
|
||||
distributed under the terms of Sections 1 and 2 above on a medium
|
||||
customarily used for software interchange; or,
|
||||
|
||||
c) Accompany it with the information you received as to the offer
|
||||
to distribute corresponding source code. (This alternative is
|
||||
allowed only for noncommercial distribution and only if you
|
||||
received the program in object code or executable form with such
|
||||
an offer, in accord with Subsection b above.)
|
||||
|
||||
The source code for a work means the preferred form of the work for
|
||||
making modifications to it. For an executable work, complete source
|
||||
code means all the source code for all modules it contains, plus any
|
||||
associated interface definition files, plus the scripts used to
|
||||
control compilation and installation of the executable. However, as a
|
||||
special exception, the source code distributed need not include
|
||||
anything that is normally distributed (in either source or binary
|
||||
form) with the major components (compiler, kernel, and so on) of the
|
||||
operating system on which the executable runs, unless that component
|
||||
itself accompanies the executable.
|
||||
|
||||
If distribution of executable or object code is made by offering
|
||||
access to copy from a designated place, then offering equivalent
|
||||
access to copy the source code from the same place counts as
|
||||
distribution of the source code, even though third parties are not
|
||||
compelled to copy the source along with the object code.
|
||||
|
||||
4. You may not copy, modify, sublicense, or distribute the Program
|
||||
except as expressly provided under this License. Any attempt
|
||||
otherwise to copy, modify, sublicense or distribute the Program is
|
||||
void, and will automatically terminate your rights under this License.
|
||||
However, parties who have received copies, or rights, from you under
|
||||
this License will not have their licenses terminated so long as such
|
||||
parties remain in full compliance.
|
||||
|
||||
5. You are not required to accept this License, since you have not
|
||||
signed it. However, nothing else grants you permission to modify or
|
||||
distribute the Program or its derivative works. These actions are
|
||||
prohibited by law if you do not accept this License. Therefore, by
|
||||
modifying or distributing the Program (or any work based on the
|
||||
Program), you indicate your acceptance of this License to do so, and
|
||||
all its terms and conditions for copying, distributing or modifying
|
||||
the Program or works based on it.
|
||||
|
||||
6. Each time you redistribute the Program (or any work based on the
|
||||
Program), the recipient automatically receives a license from the
|
||||
original licensor to copy, distribute or modify the Program subject to
|
||||
these terms and conditions. You may not impose any further
|
||||
restrictions on the recipients' exercise of the rights granted herein.
|
||||
You are not responsible for enforcing compliance by third parties to
|
||||
this License.
|
||||
|
||||
7. If, as a consequence of a court judgment or allegation of patent
|
||||
infringement or for any other reason (not limited to patent issues),
|
||||
conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot
|
||||
distribute so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you
|
||||
may not distribute the Program at all. For example, if a patent
|
||||
license would not permit royalty-free redistribution of the Program by
|
||||
all those who receive copies directly or indirectly through you, then
|
||||
the only way you could satisfy both it and this License would be to
|
||||
refrain entirely from distribution of the Program.
|
||||
|
||||
If any portion of this section is held invalid or unenforceable under
|
||||
any particular circumstance, the balance of the section is intended to
|
||||
apply and the section as a whole is intended to apply in other
|
||||
circumstances.
|
||||
|
||||
It is not the purpose of this section to induce you to infringe any
|
||||
patents or other property right claims or to contest validity of any
|
||||
such claims; this section has the sole purpose of protecting the
|
||||
integrity of the free software distribution system, which is
|
||||
implemented by public license practices. Many people have made
|
||||
generous contributions to the wide range of software distributed
|
||||
through that system in reliance on consistent application of that
|
||||
system; it is up to the author/donor to decide if he or she is willing
|
||||
to distribute software through any other system and a licensee cannot
|
||||
impose that choice.
|
||||
|
||||
This section is intended to make thoroughly clear what is believed to
|
||||
be a consequence of the rest of this License.
|
||||
|
||||
8. If the distribution and/or use of the Program is restricted in
|
||||
certain countries either by patents or by copyrighted interfaces, the
|
||||
original copyright holder who places the Program under this License
|
||||
may add an explicit geographical distribution limitation excluding
|
||||
those countries, so that distribution is permitted only in or among
|
||||
countries not thus excluded. In such case, this License incorporates
|
||||
the limitation as if written in the body of this License.
|
||||
|
||||
9. The Free Software Foundation may publish revised and/or new versions
|
||||
of the General Public License from time to time. Such new versions will
|
||||
be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the Program
|
||||
specifies a version number of this License which applies to it and "any
|
||||
later version", you have the option of following the terms and conditions
|
||||
either of that version or of any later version published by the Free
|
||||
Software Foundation. If the Program does not specify a version number of
|
||||
this License, you may choose any version ever published by the Free Software
|
||||
Foundation.
|
||||
|
||||
10. If you wish to incorporate parts of the Program into other free
|
||||
programs whose distribution conditions are different, write to the author
|
||||
to ask for permission. For software which is copyrighted by the Free
|
||||
Software Foundation, write to the Free Software Foundation; we sometimes
|
||||
make exceptions for this. Our decision will be guided by the two goals
|
||||
of preserving the free status of all derivatives of our free software and
|
||||
of promoting the sharing and reuse of software generally.
|
||||
|
||||
NO WARRANTY
|
||||
|
||||
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
|
||||
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
|
||||
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
|
||||
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
|
||||
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
|
||||
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
|
||||
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
|
||||
REPAIR OR CORRECTION.
|
||||
|
||||
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
|
||||
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
|
||||
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
|
||||
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
|
||||
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
|
||||
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
|
||||
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
|
||||
POSSIBILITY OF SUCH DAMAGES.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
91
README
Normal file
91
README
Normal file
|
@ -0,0 +1,91 @@
|
|||
DNS FLood Detector 1.2
|
||||
Dennis Opacki
|
||||
dopacki@adotout.com
|
||||
|
||||
|
||||
What is DNS Flood Detector?
|
||||
|
||||
DNS Flood Detector was developed to detect abusive usage levels on high
|
||||
traffic nameservers and to enable quick response to the use of one's
|
||||
nameserver to facilitate spam. DNS Flood Detector is distributed under the
|
||||
Gnu Public License (see included LICENSE file for details).
|
||||
|
||||
How does it work?
|
||||
|
||||
DNS Flood Detector uses libpcap (in non-promiscuous mode) to monitor
|
||||
incoming dns queries to a nameserver. The tool may be run in one of two
|
||||
modes, either daemon mode or "bindsnap" mode. In daemon mode, the tool
|
||||
will alarm via syslog. In bindsnap mode, the user is able to get
|
||||
near-real-time stats on usage to aid in more detailed troubleshooting.
|
||||
By default, it will count dns queries directed to any address in the same
|
||||
network as the primary IP address on the interface being watched; the -A,
|
||||
-M, and -Q options can be used to modify this behaviour.
|
||||
|
||||
As of version 1.2, DNS Flood Detector can now send source IP request
|
||||
data to a network-based collector as JSON. This lets you gather near
|
||||
real-time information about who is using your DNS servers, and from
|
||||
where. I've included a sample application called dns_flood_collector.pl,
|
||||
which you can use to receive and report these data. The output of this
|
||||
program can be easily fed into a graphing tool, such as Caida's
|
||||
plot-latlong:
|
||||
|
||||
http://www.caida.org/tools/visualization/plot-latlong/
|
||||
|
||||
How do I build it?
|
||||
|
||||
Execute ./configure.pl to select the appropriate make target. Then simply
|
||||
type "make".
|
||||
|
||||
Why was it written?
|
||||
|
||||
I wrote DNS Flood Detector because the fifty or so public recursive
|
||||
nameservers I am responsible for were being abused by both customers and
|
||||
non-customers. DNS Flood Detector allows for prompt action when anomalous
|
||||
conditions are detected.
|
||||
|
||||
What do I need to use it?
|
||||
|
||||
You need libpcap and a little bit of patience.
|
||||
|
||||
What platforms does it work on?
|
||||
|
||||
Linux, BSDI, FreeBSD, Mac OSX, Solaris
|
||||
|
||||
Will it run under Windows {95,98,NT,2000,XP,2003,2008 or Win7}?
|
||||
|
||||
Maybe. I haven't tried. If it doesn't, feel free to submit a fix.
|
||||
|
||||
What does it look like?
|
||||
|
||||
Usage: ./dns_flood_detector [OPTION]
|
||||
|
||||
-i IFNAME specify interface to listen on
|
||||
-t N alarm at >N queries per second
|
||||
-a N reset alarm after N seconds
|
||||
-w N calculate stats every N seconds
|
||||
-x N create N buckets
|
||||
-m N mark total query rate every N seconds
|
||||
-A addr filter for specific address
|
||||
-M mask netmask for filter (in conjunction with -A)
|
||||
-Q don't filter by local interface address
|
||||
-b run in foreground in bindsnap mode
|
||||
-d run in background in daemon mode
|
||||
-D dump dns packets (implies -b)
|
||||
-v verbose output - use again for more verbosity
|
||||
-s send source IP stats to collector as JSON
|
||||
-z N.N.N.N address to send stats to (default 226.1.1.2)
|
||||
-p N UDP port to send stats to (default 2000)
|
||||
-h display this usage information
|
||||
|
||||
Sample Output:
|
||||
|
||||
dopacki:~$ sudo ./dns_flood_detector -v -v -b -t10
|
||||
[15:14:56] source [192.168.1.45] - 0 qps tcp : 24 qps udp [8 qps A] [16 qps PTR]
|
||||
[15:14:56] source [10.0.24.2] - 0 qps tcp : 15 qps udp [15 qps A]
|
||||
[15:15:06] source [192.168.1.45] - 0 qps tcp : 24 qps udp [8 qps A] [16 qps PTR]
|
||||
[15:15:06] source [10.0.24.2] - 0 qps tcp : 15 qps udp [14 qps A]
|
||||
[15:15:16] source [192.168.1.45] - 0 qps tcp : 23 qps udp [7 qps A] [15 qps PTR]
|
||||
|
||||
What if I have questions?
|
||||
|
||||
You can e-mail me at dopacki@adotout.com
|
19
configure.pl
Executable file
19
configure.pl
Executable file
|
@ -0,0 +1,19 @@
|
|||
#!/usr/bin/perl
|
||||
|
||||
use strict;
|
||||
|
||||
my $os = shift;
|
||||
|
||||
# get target listings
|
||||
opendir(MAKE_TARGETS,'./makefiles');
|
||||
my @targets = grep { /Makefile/ && -f './makefiles/'.$_ && s/^Makefile-// } readdir(MAKE_TARGETS);
|
||||
closedir(MAKE_TARGETS);
|
||||
|
||||
# display usage
|
||||
unless ($os && grep{/$os/}@targets) {print<<EOF;exit(0)}
|
||||
usage: $0 {@targets}
|
||||
EOF
|
||||
|
||||
# link appropriate target
|
||||
symlink './makefiles/Makefile-'.$os, 'Makefile';
|
||||
print "type make.\n";
|
157
dns_flood_collector.pl
Executable file
157
dns_flood_collector.pl
Executable file
|
@ -0,0 +1,157 @@
|
|||
#!/usr/bin/perl
|
||||
|
||||
use strict;
|
||||
use threads;
|
||||
use threads::shared;
|
||||
use Sys::Syslog;
|
||||
use Data::Dumper;
|
||||
use Getopt::Long;
|
||||
use POSIX;
|
||||
use IO::Socket::Multicast;
|
||||
use JSON;
|
||||
|
||||
# Native Maxmind library - http://www.maxmind.com/download/geoip/api/perl/
|
||||
# requires: http://www.maxmind.com/app/c
|
||||
use Geo::IP;
|
||||
|
||||
# set these to the same port and multicast (or unicast) address as the detector
|
||||
use constant GROUP => '226.1.1.2';
|
||||
use constant PORT => '2000';
|
||||
|
||||
my %ipc_source :shared;
|
||||
my %ipc_customer :shared;
|
||||
my $time_to_die :shared = 0;
|
||||
my $debug;
|
||||
my $foreground=0;
|
||||
|
||||
# determines how often you want to aggregage and write-out stats dumps
|
||||
my $interval = 60;
|
||||
|
||||
# you can get the binary format GeoLiteCity.dat from Maxmind
|
||||
# http://www.maxmind.com/app/geolitecity
|
||||
my $gi = Geo::IP->open("/usr/local/GeoLiteCity.dat",GEOIP_MEMORY_CACHE | GEOIP_CHECK_CACHE);
|
||||
|
||||
# adjust this to the path where you want to keep the
|
||||
sub PATH {'/tmp/'}
|
||||
|
||||
$|=1;
|
||||
|
||||
GetOptions(
|
||||
"debug" => \$debug,
|
||||
"foreground" => \$foreground,
|
||||
"interval=s" => \$interval,
|
||||
);
|
||||
|
||||
|
||||
main();
|
||||
exit();
|
||||
|
||||
sub main() {
|
||||
|
||||
# daemonize unless running in foreground
|
||||
unless ($foreground){
|
||||
daemonize();
|
||||
}
|
||||
|
||||
# prepare data acquisition thread
|
||||
threads->new(\&get_data);
|
||||
|
||||
while (! $time_to_die ) {
|
||||
|
||||
# record time started to help evenly space runs
|
||||
my $start_run = time();
|
||||
my $next_run = $start_run + $interval;
|
||||
|
||||
# de-serialize latest copy of source address structure
|
||||
# execute this in a isolated scope so that lock goes out of scope
|
||||
{
|
||||
my $source_distance;
|
||||
|
||||
# lock data structure to prevent other thread from updating it
|
||||
lock(%ipc_source);
|
||||
|
||||
# open coordinates file for graph generation
|
||||
open(CRDS, ">".PATH."/coords.txt.tmp");
|
||||
|
||||
# calculate great circle distance between each source IP and local POP
|
||||
foreach my $key (keys %ipc_source) {
|
||||
|
||||
eval {
|
||||
my $r = $gi->record_by_addr($key);
|
||||
|
||||
# write raw entry to coordinates file
|
||||
print CRDS $key.",".$ipc_source{$key}.",".$r->latitude.",".$r->longitude."\n";
|
||||
};
|
||||
if ($@) {
|
||||
print CRDS $key.",".$ipc_source{$key}.",0,0\n";
|
||||
}
|
||||
}
|
||||
|
||||
# close coordinate file
|
||||
close CRDS;
|
||||
system("mv ".PATH."/coords.txt.tmp ".PATH."/coords.txt");
|
||||
|
||||
# clean out structure for next sample period
|
||||
%ipc_source = ();
|
||||
}
|
||||
|
||||
# sleep to make the interval
|
||||
while((my $time_left = ($next_run - time())) > 0) {
|
||||
sleep($time_left);
|
||||
}
|
||||
}
|
||||
threads->join();
|
||||
return;
|
||||
}
|
||||
|
||||
# fetch data from UDP multicast
|
||||
sub get_data() {
|
||||
|
||||
# set up our multicast listener
|
||||
# note: this will receive unicast fine too
|
||||
my $sock = IO::Socket::Multicast->new(LocalPort=>PORT,ReuseAddr=>1);
|
||||
$sock->mcast_add(GROUP) || die "Couldn't set group: $!\n";
|
||||
|
||||
|
||||
while ( ! $time_to_die ) {
|
||||
my $data;
|
||||
next unless $sock->recv($data,1500);
|
||||
|
||||
# decode JSON
|
||||
eval {
|
||||
my $obj = decode_json $data;
|
||||
print Dumper $obj;
|
||||
foreach my $ip (keys %{$obj->{data}}) {
|
||||
my $count = $obj->{data}->{$ip};
|
||||
lock(%ipc_source);
|
||||
$ipc_source{$ip}+=$count;
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
# done!
|
||||
threads->exit();
|
||||
}
|
||||
|
||||
# daemonize application
|
||||
sub daemonize {
|
||||
|
||||
chdir '/' or die "Can't chdir to /: $!";
|
||||
open STDIN, '/dev/null' or die "Can't read /dev/null: $!";
|
||||
open STDOUT, '>/dev/null';
|
||||
|
||||
# fork and exit parent
|
||||
my $pid = fork();
|
||||
exit if $pid;
|
||||
die "Couldn't fork: $!" unless defined ($pid);
|
||||
POSIX::setsid() || die ("$0 can't start a new session: $!");
|
||||
open STDERR, '>&STDOUT' or die "Can't dup stdout: $!";
|
||||
|
||||
# signal handlers
|
||||
$SIG{KILL} = \&handler;
|
||||
}
|
||||
|
||||
sub handler {
|
||||
$time_to_die = 1;
|
||||
}
|
1031
dns_flood_detector.c
Normal file
1031
dns_flood_detector.c
Normal file
File diff suppressed because it is too large
Load diff
79
dns_flood_detector.h
Normal file
79
dns_flood_detector.h
Normal file
|
@ -0,0 +1,79 @@
|
|||
/******************************************************************************
|
||||
|
||||
Program: dns_flood_detector.h
|
||||
Author: Dennis Opacki <dopacki@adotout.com>
|
||||
Date: Tue Mar 18 16:46:53 EST 2003
|
||||
Purpose: Monitor DNS servers for abusive usage levels
|
||||
and alarm to syslog
|
||||
|
||||
Copyright (C) 2003 Dennis Opacki
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
*******************************************************************************/
|
||||
|
||||
// definitions
|
||||
#ifndef ETHER_HDRLEN
|
||||
#define ETHER_HDRLEN 14
|
||||
#endif
|
||||
#define NS_MAXDNAME 1025
|
||||
#define MAXSYSLOG 192
|
||||
#define MAXMESSAGE 1200
|
||||
#define MAXDATALET 64
|
||||
#define MAXHEAD 300
|
||||
#define MAX_TIME_LEN 20
|
||||
#define DEFAULT_PORT 2000
|
||||
#define DEFAULT_IP "226.1.1.2"
|
||||
#define HOST_NAME_MAX 254
|
||||
|
||||
// evil Solaris hack
|
||||
#ifdef __sun__
|
||||
typedef uint8_t u_int8_t;
|
||||
typedef uint16_t u_int16_t;
|
||||
typedef uint32_t u_int32_t;
|
||||
#endif
|
||||
|
||||
// prototypes
|
||||
void handle_IP(u_char *args,const struct pcap_pkthdr* pkthdr,const u_char* packet);
|
||||
int calculate_averages();
|
||||
int saddr_stats(int sock, struct sockaddr_in addr, char *hostname);
|
||||
int scour_bucket(int i);
|
||||
int find_bucket(struct in_addr *ip_src);
|
||||
int daemonize(void);
|
||||
int malloc_fail(char * var, int size);
|
||||
int microsleep(unsigned int usec);
|
||||
|
||||
// data structures
|
||||
struct my_dns {
|
||||
u_int16_t dns_id; /* query identification number */
|
||||
u_int8_t dns_flags1; /* first byte of flags */
|
||||
u_int8_t dns_flags2; /* second byte of flags */
|
||||
u_int16_t dns_qdcount; /* number of question entries */
|
||||
u_int16_t dns_ancount; /* number of answer entries */
|
||||
u_int16_t dns_nscount; /* number of authority entries */
|
||||
u_int16_t dns_arcount; /* number of resource entries */
|
||||
};
|
||||
|
||||
struct bucket {
|
||||
struct in_addr ip_addr;
|
||||
unsigned int tcp_count;
|
||||
unsigned int udp_count;
|
||||
unsigned int qps;
|
||||
int qstats[256];
|
||||
time_t first_packet;
|
||||
time_t last_packet;
|
||||
time_t alarm_set;
|
||||
};
|
||||
|
36
dnsflood
Executable file
36
dnsflood
Executable file
|
@ -0,0 +1,36 @@
|
|||
#! /bin/sh
|
||||
|
||||
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
|
||||
|
||||
test -f /usr/local/sbin/dns_flood_detector || exit 0
|
||||
|
||||
case "$1" in
|
||||
start)
|
||||
echo -n "Starting DNS flood detector: dns_flood_detector"
|
||||
start-stop-daemon --start --quiet --exec /usr/local/sbin/dns_flood_detector -- -d
|
||||
echo "."
|
||||
;;
|
||||
stop)
|
||||
echo -n "Stopping DNS flood detector: dns_flood_detector"
|
||||
start-stop-daemon --stop --quiet --exec /usr/local/sbin/dns_flood_detector
|
||||
killall dns_flood_detector
|
||||
echo "."
|
||||
;;
|
||||
restart|force-reload)
|
||||
echo -n "Restarting DNS flood detector: dns_flood_detector... "
|
||||
start-stop-daemon --stop --quiet --exec /usr/local/sbin/dns_flood_detector
|
||||
sleep 2
|
||||
start-stop-daemon --stop --quiet --exec /usr/local/sbin/dns_flood_detector
|
||||
sleep 4
|
||||
killall dns_flood_detector
|
||||
sleep 2
|
||||
start-stop-daemon --start --quiet --exec /usr/local/sbin/dns_flood_detector -- -d
|
||||
echo "done."
|
||||
;;
|
||||
*)
|
||||
echo "Usage: /etc/init.d/dnsflood {start|stop|restart|force-reload}"
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
|
||||
exit 0
|
13
makefiles/Makefile-BSDI
Normal file
13
makefiles/Makefile-BSDI
Normal file
|
@ -0,0 +1,13 @@
|
|||
CFLAGS+=-O -g
|
||||
LDLIBS=-lpcap -pthread -lm
|
||||
|
||||
all: dns_flood_detector
|
||||
strip dns_flood_detector
|
||||
clean:
|
||||
rm -rf dns_flood_detector *.o *~
|
||||
install:
|
||||
cp dns_flood_detector /usr/local/sbin/
|
||||
distclean: clean
|
||||
rm Makefile
|
||||
|
||||
dns_flood_detector: dns_flood_detector.c
|
13
makefiles/Makefile-FreeBSD
Normal file
13
makefiles/Makefile-FreeBSD
Normal file
|
@ -0,0 +1,13 @@
|
|||
CFLAGS+=-O -g
|
||||
LDLIBS=-lpcap -pthread -lm
|
||||
|
||||
all: dns_flood_detector
|
||||
strip dns_flood_detector
|
||||
clean:
|
||||
rm -rf dns_flood_detector *.o *~
|
||||
install:
|
||||
cp dns_flood_detector /usr/local/sbin/
|
||||
distclean: clean
|
||||
rm Makefile
|
||||
|
||||
dns_flood_detector: dns_flood_detector.c
|
13
makefiles/Makefile-Linux
Normal file
13
makefiles/Makefile-Linux
Normal file
|
@ -0,0 +1,13 @@
|
|||
CFLAGS=-Wall -O -D_BSD_SOURCE -g
|
||||
LDLIBS=-lpcap -lpthread -lm
|
||||
|
||||
all: dns_flood_detector
|
||||
strip dns_flood_detector
|
||||
clean:
|
||||
rm -rf dns_flood_detector *.o *~
|
||||
install:
|
||||
cp dns_flood_detector /usr/local/sbin/
|
||||
distclean: clean
|
||||
rm Makefile
|
||||
|
||||
dns_flood_detector: dns_flood_detector.c
|
13
makefiles/Makefile-OSX
Normal file
13
makefiles/Makefile-OSX
Normal file
|
@ -0,0 +1,13 @@
|
|||
CFLAGS+=-Wall -O -g -I/usr/local/include -I/usr/include
|
||||
LDLIBS=-lpcap -lpthread -lm
|
||||
|
||||
all: dns_flood_detector
|
||||
strip dns_flood_detector
|
||||
clean:
|
||||
rm -rf dns_flood_detector *.o *~
|
||||
install:
|
||||
cp dns_flood_detector /usr/local/sbin/
|
||||
distclean: clean
|
||||
rm Makefile
|
||||
|
||||
dns_flood_detector: dns_flood_detector.c
|
13
makefiles/Makefile-Solaris
Normal file
13
makefiles/Makefile-Solaris
Normal file
|
@ -0,0 +1,13 @@
|
|||
CFLAGS+=-O -g -I/usr/local/include -I/usr/include
|
||||
LDLIBS=-L/usr/local/lib -L/usr/lib -lpcap -lpthread -lm -lsocket -lnsl
|
||||
|
||||
all: dns_flood_detector
|
||||
strip dns_flood_detector
|
||||
clean:
|
||||
rm -rf dns_flood_detector *.o *~
|
||||
install:
|
||||
cp dns_flood_detector /usr/local/sbin/
|
||||
distclean: clean
|
||||
rm Makefile
|
||||
|
||||
dns_flood_detector: dns_flood_detector.c
|
Loading…
Reference in a new issue