NetworkSecurity-LABManual

Written by G.RAVINDARKUMAR [APT 365]

NETWORK SECURITY LAB

NETWORK SECURITY LAB MANNUAL

FOR VI SEMESTER Computer Science & Engineering Students

BY

Mr. G.RAVINDRAKUMAR

HEAD OF COMPUTER SCIENCE DEPARTMENT

COMPUTER SCIENCE & ENGG. DEPARTMENT

ADARSHA POLYTECHNIC

R.T.NAGAR, BANGALORE

FOR ANY QUERIES CONTACT TO

email: [email protected]

Mr. N.G SEETHARAMU

Principal, Adarsha Polytechnic

mailto:[email protected]


1. LEARN TO INSTALL WINE / VIRTUAL BOX OR ANY OTHER EQUIVALENT

SOFTWARE ON THE HOST OS.

Virtualization is the process of emulating hardware inside a virtual machine.

Virtualization can include the following:

Application Virtual Machines.

Mainframe Virtual Machines.

Parallel Virtual Machines.

Operating System Virtual Machines.

Download the latest version of Sun Virtual Box from the website.

The installation steps are

1. Double Click on Virtual Box Executable File.

2. Welcome to the Oracle VM appears [Setup Wizard] Click Next.

3. Custom Setup Screen with all the features of VM appears Click Next.

4. Options to create shortcut on Desktop and Quick launch bar Click Next.

5. Ready to Install Click on Install button.

6. Click Finish Start Oracle VM Virtual Box.

And now install any kind of Operating Systems as Guest Operating System.

The Configuration of Guest OS is shown below.


1. PERFORM AN EXPERIMENT TO GRAB A BANNER WITH TELNET AND PERFORM

THE TASK USING NETCAT UTILITY.

Banner Grabbing is a technique to determine which application or service is running on the

specified port by attempting to make a connection to this host.

Banner Grabbing can be performed in two ways.

1. ONLINE (Thru Internet connection by connecting to remote websites)

2. OFFLINE (Thru Local LAN or with Virtual Box Guest OS)

1. First Enable the TELNET service on your computer by typing the command given;

Type the command SERVICES.MSC in run command menu, Click on Telnet service and enable

the service, select it automatic and Click Start.

2. Open Command prompt and type the following ;

telnet www.rediff.com 80 (http port) and press enter key twice.

3. Now you can see the rediff website web server’s information.

4. You can also try it on your local machine connecting to your Guest OS like

telnet Guest IP address(example: 192.168.56.101) 80 and press enter twice.

5. The same Banner grabbing can also perform by the NETCAT utility available at

http://netcat.sourceforge.net the compressed file.

6. Extract on your local drive and perform the following in the command prompt;

Netcat www.rediff.com 80 (http port) and press enter twice to see the result.

7. Use the same procedure on Guest Operating System like

But before using netcat command please install the IIS (Internet Information

Server) from Add/Remove components on your Guest OS, then apply this;

Netcat –vv –n guest ip address(example: 192.168.56.101) 80 and press enter

twice to see the result.

-vv=verbose mode , -n=numerical IP address only.

http://www.rediff.com/

http://netcat.sourceforge.net/

http://www.rediff.com/


3. PERFORM AN EXPERIMENT FOR PORT SCANNING WITH NMAP, SUPERSCAN

OR ANY OTHER SOFTWARE.

Port Scanning is the process of connecting to TCP and UDP port for the purpose of finding

which services and applications are open on the Target Machine.

TCP establishes a connection by using what is called a Three way handshake. The TCP header

contains one byte field for the flags. These flags include the following;

ACK The receiver will send an Ack to acknowledge data.

SYN Setup to begin communication on initial sequence number.

FIN Inform the other host that the sender has no more data to send.

RST Abort operation.

PSH Force data delivery without waiting for buffers to fill.

URG Indicate priority data.

The port numbers are unique only within a computer system. Port numbers are 16-bit unsigned

numbers. The port numbers are divided into three ranges: the Well Known Ports (0-1023), the

Registered Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535).

All the operating systems now honor the tradition of permitting only the super-user open the

ports numbered 0 to 1023. Some are listed below:

echo 7/tcp Echo

ftp-data 20/udp File Transfer [Default Data]

ftp 21/tcp File Transfer [Control]

ssh 22/tcp SSH Remote Login Protocol

telnet 23/tcp Telnet

domain 53/udp Domain Name Server

www-http 80/tcp World Wide Web HTTP

Nmap ("Network Mapper") is a free and open source utility for network exploration or security

auditing. The FIVE port states recognized by Nmap such as:

1. Closed 2. Filtered 3. UnFiltered 4. Open-Filtered 5. Closed-Filter

Download Super Scan 3.0 tool from the WebSite and Execute the following:


4. USING NMAP 1)FIND OPEN PORTS ON A SYSTEM 2) FIND THE MACHINES

WHICH ARE ACTIVE 3)FIND THE VERSION OF REMOTE OS ON OTHER SYSTEMS

4)FIND THE VERSION OF S/W INSTALLED ON OTHER SYSTEM

1. Download Nmap from www.nmap.org and install the Nmap Software with WinPcap Driver

utility.

2. Execute the Nmap-Zenmap GUI tool from Program Menu or Desktop Icon.

3. Type the Target Machine IP Address(ie.Guest OS or any website Address)

4. Perform the profiles shown in the utility.

http://www.nmap.org/


5. PERFORM AN EXPERIMENT ON ACTIVE AND PASSIVE FINGER

PRINTING USING XPROBE2 AND NMAP.

Fingerprinting is a process in scanning phase in which an attacker tries to identify Operating

System of target Machine. Fingerprinting can be classified into two types

Active and Passive Fingerprinting

Active Stack Fingerprinting

It involves sending data to the target system and then see how it responds. Based on the fact that

teach system will respond differently, the response is compared with database and the OS is

identified. It is commonly used method though there are high chances of getting detected. It can

be performed by following ways.


Using Nmap : Nmap is a port scanning tool that can be used for active stack OS fingerprinting.

Syntax: nmap -O IP_address

Example: nmap –O 192.168.56.101

Using Xprobe2: This UNIX tool for active fingerprinting.

Syntax: xprobe2 -v IP_address

Example: xprobe -v 192.168.56.101

Passive Fingerprinting involves examining traffic on network to determine the operating system.

There is no guarantee that the fingerprint will be accurate but usually they are accurate. It

generally means sniffing traffic rather than making actual contact and thus this method is

stealthier and usually goes undetected.

6. PERFORMA AN EXPERIMENT TO DEMONSTRATE HOW TO SNIFF FOR ROUTER

TRAFFIC BY USING THE TOOL WIRESHARK.

A packet sniffer, sometimes referred to as a network monitor or network analyzer, can be used

by a network or system administrator to monitor and troubleshoot network traffic. Using the

information captured by the packet sniffer an administrator can identify erroneous packets and

use the data to pinpoint bottlenecks and help maintain efficient network data transmission.

In its simple form a packet sniffer simply captures all of the packets of data that pass through

a given network interface. By placing a packet sniffer on a network in promiscuous mode, a

Malicious intruder can capture and analyze all of the network traffic.

Wireshark is a network packet analyzer. A network packet analyzer will try to capture

network packets and tries to display that packet data as detailed as possible.

Download and install wireshark network analyzer.

Steps to capture traffic:


1. Open Wireshark network analyzer.

2. Select interface: Goto capture option in menu bar and select interface


Start Caputuring

7. PERFORM AN EXPERIMENT HOW TO USE DUMPSEC.

SomarSoft's DumpSec is a (free) security auditing program for Microsoft Windows NT/2000. It dumps the permissions (DACLs) and audit settings (SACLs) for the file system, registry, printers and shares in a concise, readable format, so that holes in system security are readily apparent. DumpSec also dumps user, group and replication information. DumpSec is a must have product for Windows NT systems administrators and computer security auditors. 1. Download & install dumpsec.

2. Open dumpsec and select computer


2. Now select report=> dump users as table and click ok.


Printer Sharing Report

Permission on Shares:

8. PERFORM AN WIRELESS AUDIT OF AN ACCESS POINT / ROUTER AND DECRYPT WEP AND WPA.

NetStumbler (Network Stumbler) is one of the Wi-Fi hacking tool which only compatible with windows, this tool also a freeware. With this program, we can search for wireless network which open and infiltrate the network. Its having some compatibility and network adapter issues.


Download and install Netstumbler It is highly recommended that your PC should have wireless network card in order to access

wireless router. Now Run Netstumbler in record mode and configure wireless card. There are several indicators regarding the strength of the signal, such as GREEN indicates

Strong, YELLOW and other color indicates a weaker signal, RED indicates a very weak and GREY indicates a signal loss.

Lock symbol with GREEN bubble indicates the Access point has encryption enabled. MAC assigned to Wireless Access Point is displayed on right hand pane. The next coloumn displays the Access points Service Set Identifier[SSID] which is useful to crack

the password. To decrypt use WireShark tool by selecting EditpreferencesIEEE 802.11 Enter the WEP keys as a string of hexadecimal numbers as A1B2C3D4E5


Adding Keys: Wireless Toolbar If you are using the Windows version of Wireshark and you have an AirPcap adapter you can add decryption keys using the wireless toolbar. If the toolbar isn't visible, you can show it by selecting View->Wireless Toolbar. Click on the Decryption Keys... button on the toolbar:

This will open the decryption key managment window. As shown in the window you can select between three decryption modes: None, Wireshark, and Driver:

9. PERFORM AN EXPERIMENT TO SNIFF TRAFFIC USING ARP POISONING. Address Resolution Protocol (ARP) poisoning is a type of attack where the Media Access

Control [MAC] address by the attacker called spoofing. ARP poison routing uses the stored

cache as a way to reroute or redirect ;packets from a target, to an intermediate machine. Thus

MAN in MIDDLE watch the traffic between Source and Target machines.


To perform this Install CAIN and Abel tool and do the following:

Click on Sniffer menu.

Click on hosts on the button portion window.

Click Start sniffer and APR service from Standard toolbar menu.

Right Click on the hosts window and click on Scan MAC address.

Select all hosts in my subnet or range FROM and TO IP address and Click OK.

Now you view the MAC and IP address of Remote / Local machines.

Click on APR button on toolbar menu.

Left Click on right pane of APR window and then Click on ‘+’ symbol on standard

toolbar.

APR enables you to poison IP traffic between the selected host .

Click on any IP address on the left side list and the other IP selected on the right side.


Left Click on Right side on the IP address and Click OK.

Wathch the poisoning effect FROM and TO IP address.

The analysis of this traffic can also be performed by other tool called ETHEREAL.


ABEL is the second part of program composed by two files able.exe and abel.dll. The service

can be installed with Administrative Priviledges on the Target Machine.

Execute Abel.exe from ProgramFiles Folder.

Expand Microsoft windows Network and Click on all Computers.

Right Click on Computer and Connect as Administrative Credentials.

Once connected Right Click on services icon and select install Abel, the two files abe.exe

and abel.dll will be copied on to connected Computer.

Now bring up a console prompt on the connected Computer examine the password hashes.


10. Install IPCop on a linux system and learn all the function available on the software.

IPCOP Linux is a complete Linux distribution. Its sole purpose is to protect the network. Its main

features are: IP table network filter, All types of Drive Support and Quad Network support such

as GREEN(Internal Trusted Network), BLUE(Wireless Semi-Trusted Network,

ORANGE(Demilitarized Zone for internet Access Servers, RED(The Internet)

Installation Procedure as follows:

Download IPCOP 2.0.2.iso from www.ipcop.org.

Run Virtual Box on Host PC and add IPCOP.ISO file and Start the Installation.

The Bootup Screen appears hit enter key.

http://www.ipcop.org/


Select Default English Language and Press Enter-Key

Select default US layout Keyboard and Press Enter-Key.

Select Asia/Calcutta and Press OK to proceed.

Change the Date and Time if required and Press OK.

Select the disk installation default HDD and Press OK.

Skip the restore windows by pressing skip option button.

Now Disk installation is complete press on congratulation button.

Enter HOST name ipcop and Press OK.

Domain Name local domain and Press OK.

Select DHCP by pressing space bar key and Press OK.

Select card assignment first as GREEN and second as RED and Press DONE.


Press OK on DHCP server by Default.

Type the Password for root minimum 6 characters and Press OK

Type the Password for admin minimum 6 characters and Press OK.

Type the Password for backup minimum 6 characters and Press OK.

Your IPCOP Virtual Box Reboots.

Type the username as root and enter the password , Press Enter-Key.

Now open your Internet Explorer Web Browser and type the following in the address bar:

https://192.168.1.1:8443/ and Press Enter-Key.

Certificate error is obtained Click on continue which displays as not recommended

anyway.

IPCOP begins and enter the username as admin and type the password, click OK.

The Full Fledge IPCOP firewall is now ready.

https://192.168.1.1:8443/


Practice the absic options of IPCOP firewall.

11. INSTALL JCRYPT TOOL (OR ANY OTHER EQUIVALENT) AND DEMONSTRATE ASYMMETRIC, SYMMETRIC CRYPTO ALGORITHM, HASH AND DIGITAL/PKI SIGNATURES

ASYMMETRIC ALGORITHM

o Download Jcrypt tool from Cryptool Website and Install

o Open Jcrypt Software and Click on NEW text editior, type the text information into it.


o Click on the Algorithm menu bar and Select Asymmetric algorithm RSA for encryption.

o Click create a New KeyPair and type in the contact name[xxxxx] and enter the password

and confirm password, then Click finish again.


o Now you can see RSA output bin file is generated.

o The same output bin file to decrypt select RSA Algorithm and Click on Decrypt, Select

keyname you have declared earlier and Click Finish.

o Enter the password to Decrypt and see the output with original Decrypted text on the

Screen.


SYMMETRIC ALGORITHM

o Click on Algorithm Menu bar Select SymmetricAES and Click on it.

o Click on create a new key, type contact name and enter the password and confirm, Click

finish Click finish again.

o Enter the password to open the output file.

o To Decrypt Select Algorithms SymmetricSelect the key which you have created and

Click Finish.

o Enter the password and see the result in output bin file with hexadecimal values and plain

text.

HASH GENERATION

o Click on Algorithms, Click on HashSelect MD5Click Finish.

o Now view the output bin file HASH generated.

o Practice using SHA and SHA3 and verify the result on the screen.

DIGITAL SIGNATURE

o Click on algorithms, Click on Signature, Select DSA and Click on it.

o Select sign operation and Click on create a new key.

o Enter the password and save the file and Click finish.

o To verify Click on Algorithm, Click on Signature and Click DSA.

o Select verify operation, Click open and type the password and Click finish.

o The Signature file is opened and verified.


SHA1 RANDOM PASSWORD GENERATOR

o Click AlgorithmClick Random Number GeneratorClick SHA1

o Type the output size[default 128 bits] or your choice.

o Select filter output binary or output as character or output as numbers and Click Finish.

o The output bin SHA1 file is generated and displayed on the screen.

o Practice with various size and filter to binary output or output as character or output as

number.

12. DEMONSTRATE INTRUSION DETECTION SYSTEM (IDS) USING ANY TOOL

EG . SNORT OR ANY OTHER S/W

SNORT can be configured to run in three modes:

1. Sniffer mode 2. Packet Logger mode 3. Network Intrusion Detection System mode

Sniffer modesnort –v Print out the TCP/IP packets header on the screen

Snort –vd show the TCP/IP ICMP header with application data in transit.

Packet Logger mode snort –dev –l c:\log [create this directory in the C drive] and snort will

automatically know to go into packet logger mode, it collects every

packet it sees and places it in log directory.

snort –dev –l c:\log –h ipaddress/24 This rule tells snort that you want to

print out the data link and TCP/IP headers as well as application data

into the log directory.

snort –l c:\log –b This is binary mode logs everything into a single file.

Network Intrusion Detection System mode snort –d c:\log –h ipaddress/24 –c snort.conf This

is a configuration file applies rule to each packet

to decide it an action based upon the rule type in

the file.

Snort –d –h ipaddress/24 –l c:\log –c snort.conf

This will cnfigure snort to run in its most basic

NIDS form, logging packets that trigger rules

specifies in the snort.conf


Download SNORT from snort.org

Install snort with or without database support.

Select all the components and Click Next.

Install and Close.

Skip the WinPcap driver installation

Add the path variable in windows environment variable by selecting new classpath.

Create a path variable and point it at snort.exe variable namepath and variable

valuec:\snort\bin.


Click OK button and then close all dialog boxes.

Open command prompt and type the following commands:


13. INSTALL ROOTKITS AND STUDY VARIETY OF OPTIONS

Rootkit is a stealth type of malicious software designed to hide the existence of certain process

from normal methods of detection and enables continued privileged access to a computer.

Download Rootkit Tool from GMER website. www.gmer.net

This displays the Processes, Modules, Services, Files, Registry, RootKit/Malwares,

Autostart, CMD of local host.

Select Processes menu and kill any unwanted process if any.

Modules menu displays the various system files like .sys, .dll

Services menu displays the complete services running with Autostart, Enable, Disable,

System, Boot.

Files menu displays full files on Hard-Disk volumes.

Registry displays Hkey_Current_user and Hkey_Local_Machine.

Rootkits/Malawares scans the local drives selected.

Autostart displays the registry base Autostart applications.

CMD allows the user to interact with command line utilities or Registry.

http://www.gmer.net/


14. GENERATING PASSWORD HASHES WITH OPENSSL

The Open SSL is command line binary can perform a wide range of cryptographic operation.

Install Open SSL setup file on to the default location.

Perform Full installation and Click Next.

Create Document shortcuts in start menu and Click Next

Complete the installation.

Execute the Open SSL from command prompt available at

C:\ProgramFiles\GnuWin32\OpenSSL\openssl.exe

openssl> (This is the Open SSL prompt)

Now execute the command as follows for password generation.

Passwd –crypt [type your password] This is limited to 8 characters password generator.

Passwd -1 [your password] This allows you to insert password length beyond 8

characters.

Type this command to generate 10-12 characters passwords of TEN numbers.


15. SETUP A HONEY POT AND MONITOR THE HONEYPOT ON NETWORK

Honey Pot is a device placed on Computer Network specifically designed to capture malicious

network traffic.

KF Sensor is the tool to setup as honeypot when KF Sensor is running it places a siren icon in the

windows system tray in the bottom right of the screen. If there are no alerts then green icon is

displayed.

Download KF Sensor Evaluation Setu File from KF Sensor Website.

Install with License Agreement and appropriate directory path.

Reboot the Computer now.

The KF Sensor automatically starts during windows boot Click Next to setup wizard.

Select all port classes to include and Click Next.

Send the email and Send from email enter the ID and Click Next.

Select the options such as Denial of Service[DOS], Port Activity, Proxy Emulsion,

Network Port Analyzer, Click Next.

Select Install as System service and Click Next.

Click finish.

NetworkSecurity-LABManual

Documents

Transcript of NetworkSecurity-LABManual