Partition Tools
Partition Magic Pro 8.05
Best software to partition hard drive

Acronis Disk Director 10.0.2160
Popular disk management functions in a single suite

Paragon Partition Manager 7.0.1274
Universal tool for partitions

Partition Commander 9.01
The safe way to partition your hard drive,with undo feature

Ranish Partition Manager 2.44
a boot manager and hard disk partitioner.

The Partition Resizer 1.3.4
move and resize your partitions in one step and more.

Smart Fdisk 2.05
a simple harddisk partition manager

SPecial Fdisk 2000.03v
SPFDISK a partition tool.

eXtended Fdisk 0.9.3
XFDISK allows easy partition creation and edition

GDisk 1.1.1
Complete replacement for the DOS FDISK utility and more.

Super Fdisk 1.0
Create, delete, format partitions drives without destroying data.

Partition Table Editor 8.0
Partition Table and Boot Record Editor

EASEUS Partition Master 4.0.1
Partition Resize/Move/Copy/Create/Delete/Format/Convert, Explore, etc.

Backup Tools
ImageCenter 5.6 (Drive Image 2002)
Best software to clone hard drive

Norton Ghost 11.5
Similar to Drive Image (with usb/scsi support)

Acronis True Image 8.1.945
Create an exact disk image for complete system backup and disk cloning.

Partition Saving 3.71
A tool to backup/restore partitions. (SavePart.exe)

COPYR.DMA Build013
A Tool for making copies of hard disks with bad sectors

DriveImageXML 2.02
backup any drive/partition to an image file, even if the drive is currently in use

Drive SnapShot 1.39
creates an exact Disk Image of your system into a file while windows is running.

Ghost Image Explorer 11.5
to add/remove/extract files from Ghost image file

DriveImage Explorer 5.0
to add/remove/extract files from Drive image file

WhitSoft File Splitter 4.5a
a Small File Split-Join Tool

InfraRecorder 0.50
An Open source CD/DVD burning software, also create/burn .iso images

FastCopy 1.99r4
The Fastest Copy/Delete Software on Windows

Smart Driver Backup 2.12
Easy backup of your Windows device drivers (also works from PE)

Double Driver 2.1
Driver Backup and Restore tool

DriverBackup! 1.0.3
Another handy tool to backup drivers

Recovery Tools
Active Partition Recovery 3.0
To Recover a Deleted partition.

Active Uneraser 3.0
To recover deleted files and folders on FAT and NTFS systems.

Ontrack Easy Recovery Pro 6.10
To Recover data that has been deleted/virus attack

Winternals Disk Commander 1.1
more than just a standard deleted-file recovery utility

TestDisk 6.11.3
Tool to check and undelete partition from Dos/Windows

Lost & Found 1.06
a good old data recovery software.

DiyDataRecovery Diskpatch 2.1.100
An excellent data recovery software.

Prosoft Media Tools 5.0 v1.1.2.64
Another excellent data recovery software with many other options.

PhotoRec 6.11.3
Tool to Recover File and pictures from Dos/Windows

Active Undelete 5.5
a tool to recover deleted files

Restoration 3.2.13
a tool to recover deleted files

GetDataBack for FAT 4.0
Data recovery software for FAT file systems

GetDataBack for NTFS 4.0
Data recovery software for NTFS file systems

Recuva 1.29.429
Restore deleted files from Hard Drive, Digital Camera Memory Card, usb mp3 player...

Partition Find and Mount 2.3.1
Partition Find and Mount software is designed to find lost or deleted partitions

Unstoppable Copier 4.2
Allows you to copy files from disks with problems such as bad sectors,
scratches or that just give errors when reading data.

Testing Tools
System Speed Test 4.78
it tests CPU, harddrive, ect.

PC-Check 6.05
Easy to use hardware tests

Ontrack Data Advisor 5.0
Powerful diagnostic tool for assessing the condition of your computer

The Troubleshooter 7.02
all kind of hardware testing tool

PC Doctor 2004
a benchmarking and information tool

CPU/Video/Disk Performance Test 5.7
a tool to test cpu, video, and disk

Test Hard Disk Drive 1.0
a tool to test Hard Disk Drive

Disk Speed1.0
Hard Disk Drive Speed Testing Tool

S&M Stress Test 1.9.1
cpu/hdd/memory benchmarking and information tool, including temperatures/fan speeds/voltages

IsMyLcdOK (Monitor Test) 1.02
Allows you to test CRT/LCD/TFT screens for dead pixels and diffective screens

RAM (Memory) Testing Tools
GoldMemory 5.07
RAM Test utility

Memtest86+ 2.11
PC Memory Test

MemTest 1.0
a Memory Testing Tool

Video Memory Stress Test 1.7.116
a tool to thoroughly test your video RAM for errors and faults

Hard Disk Tools
Hard Disk Diagnostic Utilities
Seagate Seatools Graphical v2.13b
SeaTools for Dos 1.10
Western Digital Data Lifeguard Tools 11.2
Western Digital Diagnostics (DLGDIAG) 5.04f
Maxtor PowerMax 4.23
Maxtor amset utility 4.0
Maxtor(or any Hdd) Low Level Formatter 1.1
Fujitsu HDD Diagnostic Tool 7.00
Fujitsu IDE Low Level Format 1.0
Samsung HDD Utility(HUTIL) 2.10
Samsung Disk Diagnose (SHDIAG) 1.28
Samsung The Drive Diagnostic Utility (ESTOOL) 3.00g
IBM/Hitachi Drive Fitness Test 4.15
IBM/Hitachi Feature Tool 2.13
Gateway GwScan 5.12
ExcelStor's ESTest 4.50
MHDD 4.6
WDClear 1.30
Toshiba Hard Disk Diagnostic 2.00b

HDD Regenerator 1.71
to recover a bad hard drive

HDAT2 4.53
main function is testing and repair (regenerates) bad sectors for detected devices

Ontrack Disk Manager 9.57
Disk Test/Format/Maintenance tool.

Norton Disk Doctor 2002
a tool to repair a damaged disk, or to diagnose your hard drive.

Norton Disk Editor 2002
a powerful disk editing, manual data recovery tool.

Hard Disk Sentinel 0.04
Hard Disk health, performance and temperature monitoring tool.

Active Kill Disk 4.1
Securely overwrites and destroys all data on physical drive.

SmartUDM 2.00
Hard Disk Drive S.M.A.R.T. Viewer.

Victoria 3.33e and 3.52rus
a freeware program for low-level HDD diagnostics

HDD Erase 4.0
Secure erase using a special feature built into most newer hard drives

HDD Scan 3.2
HDDScan is a Low-level HDD diagnostic tool, it scans surface find bad sectors etc.

HDTune 2.55
Hard disk benchmarking and information tool.

Data Shredder 1.0
A tool to Erase disk and files (also wipe free space) securely

System Information Tools
PCI and AGP info Tool (2908)
The PCI System information & Exploration tool.

System Analyser 5.3w
View extensive information about your hardware

Navratil Software System Information 0.60.32
High-end professional system information tool

Astra 5.43
Advanced System info Tool and Reporting Assistant

HWiNFO 5.3.0
a powerful system information utility

PC-Config 9.33
Complete hardware detection of your computer

SysChk 2.46
Find out exactly what is under the hood of your PC

CPU Identification utility 1.17
Detailed information on CPU (CHKCPU.EXE)

CTIA CPU Information 2.7
another CPU information tool

Drive Temperature 1.0
Hard Disk Drive temperature meter

PC Wizard 2009.1.90
Powerful system information/benchmark utility designed especially for detection of hardware.

SIW 2009-07-28
Gathers detailed information about your system properties and settings.

CPU-Z 1.52
It gathers information on some of the main devices of your system

PCI 32 Sniffer 1.4 (2908)
device information tool (similar to unknown devices)

Unknown Devices 1.2 (2908)
helps you find what those unknown devices in Device Manager really are

USBDeview 1.42
View/Uninstall all installed/connected USB devices on your system

MBR (Master Boot Record) Tools
MBRWork 1.07b
a utility to perform some common and uncommon MBR functions

MBR Tool 2.2.100
backup, verify, restore, edit, refresh, remove, display, re-write...

DiskMan4
all in one tool for cmos, bios, bootrecord and more

BootFix Utility
Run this utility if you get 'Invalid system disk'

MBR SAVE / RESTORE 2.1
BootSave and BootRest tools to save / restore MBR

Boot Partition 2.60
add Partition in the Windows NT/2000/XP Multi-boot loader

Partition Table Doctor 3.5
a tool to repair/modify mbr, bootsector, partition table

Smart Boot Manager 3.7.1
a multi boot manager

Bootmagic 8.0
This tool is for multi boot operating systems

MBRWizard 2.0b
Directly update and modify the MBR (Master Boot Record)

BIOS / CMOS Tools
CMOS 0.93
CMOS Save / Restore Tool

BIOS Cracker 4.8
BIOS password remover (cmospwd)

BIOS Cracker 1.4
BIOS password remover (cmospwc)

BIOS Utility 1.35.0
BIOS Informations, password, beep codes and more.

!BIOS 3.20
a powerfull utility for bios and cmos

DISKMAN4
a powerful all in one utility

UniFlash 1.40
bios flash utility

Kill CMOS
a tiny utility to wipe cmos

Award DMI Configuration Utility 2.43
DMI Configuration utility for modifying/viewing the MIDF contents.

MultiMedia Tools
Picture Viewer 1.94
Picture viewer for dos, supports more then 40 filetypes.

QuickView Pro 2.58
movie viewer for dos, supports many format including divx.

MpxPlay 1.56
a small Music Player for dos

Password Tools
Active Password Changer 3.0.420
To Reset User Password on windows NT/2000/XP/2003/Vista (FAT/NTFS)

Offline NT/2K/XP Password Changer
utility to reset windows nt/2000/xp administrator/user password.

Registry Reanimator 1.02
Check and Restore structure of the Damaged Registry files of NT/2K/XP

NTPWD
utility to reset windows nt/2000/xp administrator/user password.

Registry Viewer 4.2
Registry Viewer/Editor for Win9x/Me/NT/2K/XP

ATAPWD 1.2
Hard Disk Password Utility

TrueCrypt 6.2a
On-the-fly disk encryption tool, can create a virtual encrypted disk within a file and mount it as a real disk, can also encrypt an entire HDD/Partition/USB Drive

Content Advisor Password Remover 1.01
It Removes Content Advisor Password from Internet Explorer

Password Renew 1.1
Utility to (re)set windows passwords

WindowsGate 1.1
Enables/Disables Windows logon password validation

WinKeyFinder 1.73
Allows you to View and Change Windows XP/2003 Product Keys, backup and restore
activation related files, backup Microsoft Office 97, 2000 SP2, XP/2003 keys etc.

XP Key Reader 2.7
Can decode the XP-key on Local or Remote systems

ProduKey 1.36
Recovers lost the product key of your Windows/Office

Wireless Key View 1.27
Recovers all wireless network keys (WEP/WPA) stored in your computer by WZC

MessenPass 1.26
A password recovery tool that reveals the passwords of several instant messangers

Mail PassView 1.51
Recovers mail passwords of Outlook Express, MS Outlook, IncrediMail, Eudora, etc.

Asterisk Logger 1.04
Reveal passwords hidden behind asterisk characters

NTFS (FileSystems) Tools
NTFS Dos Pro 5.0
To access ntfs partitions from Dos

NTFS 4 Dos 1.9
To access ntfs partitions from Dos

Paragon Mount Everything 3.0
To access NTFS, Ext2FS, Ext3FS partitions from dos

NTFS Dos 3.02
To access ntfs partitions from Dos

EditBINI 1.01
to Edit boot.ini on NTFS Partition

Browsers / File Managers
Volkov Commander 4.99
Dos File Manager with LongFileName/ntfs support
(Similar to Norton Commander)

Dos Command Center 5.1
Classic dos-based file manager.

File Wizard 1.35
a file manager - colored files, drag and drop copy, move, delete etc.

File Maven 3.5
an advanced Dos file manager with high speed PC-to-PC file
transfers via serial or parallel cable

FastLynx 2.0
Dos file manager with Pc to Pc file transfer capability

LapLink 5.0
the smart way to transfer files and directories between PCs.

Dos Navigator 6.4.0
Dos File Manager, Norton Commander clone but has much more features.

Mini Windows 98
Can run from Ram Drive, with ntfs support,
Added 7-Zip, Disk Defragmenter, Notepad / RichText Editor,
Image Viewer, .avi .mpg .divx .xvid Movie Player, etc...

Mini Windows Xp
Portable Windows Xp that runs from CD/USB/Ram Drive, with Network and SATA support

7-Zip 4.65
File Manager/Archiver Supports 7z, ZIP, GZIP, BZIP2, TAR, RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB and NSIS formats

Opera Web Browser 8.53
One of the fastest, smallest and smartest full-featured web browser

Other Tools
Ghost Walker 11.5
utility that changes the security ID (SID) for Windows NT, 2000 and XP

DosCDroast beta 2
Dos CD Burning Tools

Universal TCP/IP Network 6.4
MSDOS Network Client to connect via TCP/IP to a Microsoft based
network. The network can either be a peer-to-peer or a server based
network, it contains 91 different network card drivers
HxD 1.7.7.0
Hex Editor provides tools to inspect and edit files, main memory, disks/disk images

Virtual Floppy Drive 2.1
enables you to create and mount a virtual floppy drive on your NT/2000/XP/Vista

Streams 1.56
Reveal/Delete NTFS alternate data streams

NewSID 4.10
utility that changes the security ID (SID) for Windows NT, 2000 and XP

Dos Tools
USB CD-Rom Driver 1
Standard usb_cd.sys driver for cd drive

Universal USB Driver 2
Panasonic v2.20 ASPI Manager for USB mass storage

ASUSTeK USB Driver 3
ASUS USB CD-ROM Device Driver Version 1.00

SCSI Support
SCSI Drivers for Dos

SATA Support
SATA Driver (gcdrom.sys) and JMicron JMB361 (xcdrom.sys) for Dos

1394 Firewire Support
1394 Firewire Drivers for Dos

Interlnk support at COM1
To access another computer from COM port

Interlnk support at LPT1
To access another computer from LPT port

and too many great dos tools
very good collection of dos utilities
extract.exe	pkzip.exe	pkunzip.exe	unrar.exe	rar.exe
ace.exe	lha.exe	gzip.exe	uharcd.exe	mouse.com
attrib.com	deltree.exe	xcopy.exe	diskcopy.com	imgExtrc.exe
undelete.com	edit.com	fdisk.exe	fdisk2.exe	fdisk3.exe
lf.exe	delpart.exe	wipe.com	zap.com	format.com
move.exe	more.com	find.exe	hex.exe	debug.exe
split.exe	mem.exe	mi.com	sys.com	smartdrv.exe
xmsdsk.exe	killer.exe	share.exe	scandisk.exe	scanreg.exe
guest.exe	doskey.exe	duse.exe	biosdtct.exe	setver.exe
intersvr.exe	interlnk.exe	loadlin.exe	lfndos.exe	doslfn.com

Cleaners
SpaceMonger 1.4
keeping track of the free space on your computer

WinDirStat 1.1.2.80
a disk usage statistics viewer and cleanup tool for Windows.

CCleaner 2.23.993
Crap Cleaner is a freeware system optimization and privacy tool

Optimizers
PageDfrg 2.32
System file Defragmenter For NT/2k/XP

NT Registry Optimizer 1.1j
Registry Optimization for Windows NT/2000/2003/XP/Vista

DefragNT 1.9
This tool presents the user with many options for disk defragmenting

JkDefrag 3.36
Free disk defragment and optimize utility for Windows 2000/2003/XP/Vista

Network Tools
Angry IP Scanner 2.21
Scan IP addresses in any range as well as any their ports

CurrPorts 1.66
displays the list of all currently opened TCP and UDP ports on your computer

TCPView 2.54
Lists TCP and UDP endpoints, including the Local/Remote addresses of TCP connections

Winsock 2 Fix for 9x
to fix corrupted Winsock2 information by poorly written Internet programs

XP TCP/IP Repair 1.0
Repair your Windows XP Winsock and TCP/IP registry errors

Process Tools
IB Process Manager 1.04
a little process manager for 9x/2k, shows dll info etc.

Process Explorer 11.33
shows you information about which handles and DLLs processes have opened or loaded

OpenedFilesView 1.40
View opened/locked files in your system, sharing violation issues

Pocket KillBox 2.0.0.978
can be used to get rid of files that stubbornly refuse to allow you to delete them

ProcessActivityView 1.10
Detailed process access information read/write/opened files etc

Unlocker 1.8.7
This tool can delete file/folder when you get this message - Cannot delete file:
Access is denied, The file is in use by another program etc.

Registry Tools
RegScanner 1.77
Tool to find/search in the Registry of Windows

Registry Editor PE 0.9c
Easy editing of remote registry hives and user profiles

Registry Restore Wizard 1.0.4
Restores a corrupted system registry from Xp System Restore

Startup Tools
Autoruns 9.53
Displays All the entries from startup folder, Run, RunOnce, and other Registry keys,
Explorer shell extensions,toolbars, browser helper objects, Winlogon notifications,
auto-start services, Scheduled Tasks, Winsock, LSA Providers, Remove Drivers
and much more which helps to remove nasty spyware/adware and viruses.

Silent Runners Revision 59
A free script that helps detect spyware, malware and adware in the startup process

Startup Control Panel 2.8
a tool to edit startup programs

Startup Monitor 1.02
it notifies you when any program registers itself to run at system startup

HijackThis 2.0.2
a general homepage hijackers detector and remover and more

Tweakers
Dial a Fix 0.60.0.24
Fix errors and problems with COM/ActiveX object errors and missing registry entries,
Automatic Updates, SSL, HTTPS, and Cryptography service (signing/verification)
issues, Reinstall internet explorer etc. comes with the policy scanner

Ultimate Windows Tweaker 2.0
A TweakUI Utility for tweaking and optimizing Windows Vista

TweakUI 2.10
This PowerToy gives you access to system settings that are not exposed in the Windows Xp

Xp-AntiSpy 3.97.4 beta
it tweaks some Windows XP functions, and disables some unneeded Windows services quickly

Shell Extensions Manager (ShellExView) 1.40
An excellent tool to View and Manage all installed Context-menu/Shell extensions

EzPcFix 1.0.0.16
Helpful tool when trying to remove viruses, spyware, and malware

RemoveWGA 1.2
Windows Genuine Advantage Notifications Removal tool

RRT - Remove Restrictions Tool 3.0
To Re-enable Ctrl+Alt+Del, Folder Options and Registry tools etc.

Antivirus Tools
Kaspersky Virus Removal Tool 7.0.0.290 (2908)
Free on-demand virus scanner from Kaspersky Lab to remove viruses.

Spybot - Search & Destroy 1.6.2 (2908)
Application to scan for spyware, adware, hijackers and other malicious software.

Malwarebytes' Anti-Malware 1.40 (2908)
anti-malware application that can thoroughly remove even the most advanced malware.

SpywareBlaster 4.2 (2908)
Prevent the installation of spyware and other potentially unwanted software.

SmitFraudFix 2.423
This removes Some of the popular Desktop Hijack malware

ComboFix (2908)
Designed to cleanup malware infections and restore settings modified by malware

CWShredder 2.19
Popular CoolWebSearch Trojan Remover tool

RootkitRevealer 1.7.1
Rootkit Revealer is an advanced patent-pending root kit detection utility.

SuperAntispyware 4.27 (2908)
Remove Malware, Rootkits, Spyware, Adware, Worms, Parasites (a must have tool)

netstat -an | grep :80 | sort

netstat -n -p | grep SYN_REC | awk '{print $5}' | awk -F: '{print $1}'

netstat -n -p|grep SYN_REC | wc -l

netstat -lpn|grep :80 |awk '{print $5}'|sort

netstat -an | grep :80 | awk '{ print $5 }' | awk -F: '{ print $1 }' | sort | uniq -c | sort -n

[..]
tcp        0      0 192.168.0.3:80          192.168.0.5:60808     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60761     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60876     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60946     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60763     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60955     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60765     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60826     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60951     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60942     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:61113     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60909     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60822     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60894     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60952     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60928     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60936     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60906     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:61466     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60919     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60914     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60926     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60939     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60931     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60831     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60743     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:61076     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60912     SYN_RECV   
tcp        0      0 192.168.0.3:80          192.168.0.5:60816     SYN_RECV
[..]

Timeout 300

<IfModule prefork.c>
[..]
ServerLimit 500
MaxClients 450
[..]
</IfModule>

#por defecto ListenBacklog 511 ataque tcp syn flood
#http://httpd.apache.org/docs/2.0/mod/mpm_common.html#listenbacklog
ListenBackLog 1024

net.ipv4.tcp_syncookies = 1

net.ipv4.tcp_syncookies = 0

echo "65535" > /proc/sys/net/ipv4/ip_conntrack_max

net.ipv4.ip_conntrack_max = 65535

<IfModule mod_evasive.c>
    DOSHashTableSize    3097
    DOSPageCount        2
    DOSSiteCount        50
    DOSPageInterval     1
    DOSSiteInterval     1
    DOSBlockingPeriod   900
</IfModule>

<IfModule mod_evasive.c>
 DOSHashTableSize 3097
 DOSPageCount 1
 DOSSiteCount 50
 DOSPageInterval 1
 DOSSiteInterval 1
</IfModule>

<IfModule mod_evasive.c>
# añadir estas líneas que corresponden a rangos de los bots de google
DOSWhitelist 66.249.65.*
DOSWhitelist 66.249.66.*
</IfModule>

    # Enable IP spoofing protection, turn on Source Address Verification 

    net.ipv4.conf.all.rp_filter = 1 

    # Enable TCP SYN Cookie Protection 

    net.ipv4.tcp_syncookies = 1 

    # Enable ignoring broadcasts request
    
    net.ipv4.icmp_echo_ignore_broadcasts = 1

wget http://www.rfxnetworks.com/downloads/apf-current.tar.gz
tar xvzf apf-current.tar.gz
cd apf-0.9.6-1/
./install.sh

    
# Limitar el UDP flood
# Crear la cadena para UDP flood
iptables -N cadena-udp-flood
# Saltar a la cadena cuando el UDP es detectado
iptables -A INPUT -p  udp -j cadena-udp-flood
# Limitar la velocidad UDP  a 10/segundos con limite de 20
iptables -A cadena-udp-flood -m limit – -limit 10/s – -limit-burst 20 -m comment – -comment “Limite velocidad UDP” -j RETURN
# Logear
iptables -A cadena-udp-flood -m limit – -limit 6/h – -limit-burst 1 -j LOG – -log-prefix “Probable udp flood “
# Baneados durante 5 minutos los que más floodean
iptables -A cadena-udp-flood -m recent – -name blacklist_300 – -set -m comment – -comment “BlackList origen IP” -j DROP  

     iptables -I FORWARD -p udp -m limit --limit 200/s --limit-burst -j DROP

# todo el trafico syn
-P INPUT DROP
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p tcp ! --syn -j REJECT --reject-with tcp-reset
-A INPUT -m state --state INVALID -j DROP
-P OUTPUT DROP
-A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A OUTPUT -p tcp ! --syn -j REJECT --reject-with tcp-reset
-A OUTPUT -m state --state INVALID -j DROP
-P FORWARD DROP
-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
-A FORWARD -p tcp ! --syn -j REJECT --reject-with tcp-reset
-A FORWARD -m state --state INVALID -j DROP
-A INPUT -i lo -j ACCEPT
-A OUTPUT -o lo -j ACCEPT
-A FORWARD -i lo -o lo -j ACCEPT


# sube las cargas pero muchos wwww buena señal
-A INPUT -p tcp --syn -j REJECT --reject-with icmp-port-unreachable



# la que mejor va
-N syn-flood
-A syn-flood -m limit --limit 100/second --limit-burst 150 -j RETURN
-A syn-flood -j LOG --log-prefix "SYN flood: "
-A syn-flood -j DROP



# igual que el de arriba pero muy bestia
-N syn-flood
-A INPUT -i eth0:2 -p tcp --syn -j syn-flood
-A syn-flood -m limit --limit 1/s --limit-burst 4 -j RETURN
-A syn-flood -j DROP


-A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit
1/sec -j ACCEPT
-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK RST -m limit
--limit 1/sec -j ACCEPT

# no es muy efectivo
-A INPUT -s 0/0 -p tcp --syn --source-port 1000:5000
--destination-port 80 -j DROP

# no es muy efectivo
-A INPUT -p tcp -m tcp --dport 80 --sport 1000:5000 --tcp-flags SYN SYN -j DROP

# Descartar paquetes mal formados

-N PKT_FAKE
-A PKT_FAKE -m state --state INVALID -j DROP
-A PKT_FAKE -p tcp --dport 80 --tcp-flags ALL ACK,RST,SYN,FIN -j DROP
-A PKT_FAKE -p tcp --dport 80 --tcp-flags SYN,FIN SYN,FIN -j DROP
-A PKT_FAKE -p tcp --dport 80 --tcp-flags SYN,RST SYN,RST -j DROP
-A PKT_FAKE -p tcp --dport 80 ! --syn -m state --state NEW -j DROP
-A PKT_FAKE -f -j DROP
-A PKT_FAKE -j RETURN

# syn-flood
-N syn-flood
-A INPUT -i eth+ -p tcp --tcp-flags SYN,ACK,FIN,RST RST -j syn-flood
-A FORWARD -i eth+ -p tcp --tcp-flags SYN,ACK,FIN,RST RST -j syn-flood
-A syn-flood -m limit --limit 4/s --limit-burst 16 -j RETURN
-A syn-flood -m limit --limit 75/s --limit-burst 100 -j RETURN
-A syn-flood -j LOG --log-prefix "SYN FLOOD " --log-tcp-sequence  --log-tcp-options  --log-ip-options -m limit --limit 1/second
-A syn-flood -j DROP

# By pepel. Requiere módulo "recent"
-A INPUT -p tcp --dport 80 -m state --state NEW -m recent   --set
-A INPUT -p tcp --dport 80 -m state --state NEW -m recent  --update --seconds 10 --hitcount 10 -j DROP

#explicación:
Se añade cada ip que se conecte a la tabla de recent
Por por cada ip en la tabla de recent si hace mas de x hits en x segundos, se dropea.


iptables -I INPUT -p tcp –syn -m recent –set
iptables -I INPUT -p tcp –syn -m recent –update –seconds 10 –hitcount 30 -j DROP

UDP Flood

/sbin/iptables -A OUTPUT -p udp -m state --state NEW -j ACCEPT
/sbin/iptables -A OUTPUT -p udp -m limit --limit 100/s -j ACCEPT
/sbin/iptables -A OUTPUT -p udp -j DROP

Lo que hace es contar el número de paquetes SYN (inicio de conexión TCP) para
cada dirección IP en los últimos 10 segundos. Si llega a 30 descarta ese paquete por
 lo que no se establecerá la conexión (el TCP volverá a intentar varias veces,
cuando baje del límite podrá establecerse).

cd /usr/src
wget http://www.snert.com/Software/mod_throttle/mod_throttle312.tgz
tar zxvf mod_throttle312.tgz
cd mod_throttle-3.1.2
pico Makefile
Then edit the line that reads:
APXS=apxs
And change it to read:
APXS=/usr/local/apache/bin/apxs
make
make install
service httpd restart