QUESTION: Analyze the following script. What type of scan is the script used to run on a target host? import socket, threading def TCP_connect(ip, port_number, delay, output):
QUESTION: Analyze the following script. What type of scan is the script used to run on a target host? import socket, threading def TCP_connect(ip, port_number, delay, output):
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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![QUESTION: Analyze the following script. What type of scan
is the script used to run on a target host?
import socket, threading
def TCP_connect(ip, port_number, delay, output):
TCPsock = socket.socket(socket.AF_INET,
socket.SOCK_STREAM)
TCPsock.setsockopt(socket.SOL_SOCKET,
socket.SO_REUSEADDR, 1)
TCPsock.settimeout(delay)
try:
TCPsock.connect((ip, port_number))
output[port_number] = 'Listening'
except:
output[port_number] =
def scan_ports(host_ip, delay):
threads = []
# To run TCP connect concurrently
output = {}
# For printing purposes
# Spawning threads to scan ports
for i in range(10000):
t = threading.Thread(target=TCP_connect, args=
(host_ip, i, delay, output))
threads.append(t)
# Starting threads
for i in range(10000):
threads[i].start()
# Locking the main thread until all threads complete
for i in range(10000):
threads[i).join()
# Printing listening ports from small to large
for i in range(10000):
if output[i] == 'Listening':
print(str(i) + ': '+ output[i])](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F36ea5f41-5421-4bca-b81a-555659e9d545%2F07e74ced-f367-469f-ba9a-ca7e94ccfbc1%2F9fjqx05_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QUESTION: Analyze the following script. What type of scan
is the script used to run on a target host?
import socket, threading
def TCP_connect(ip, port_number, delay, output):
TCPsock = socket.socket(socket.AF_INET,
socket.SOCK_STREAM)
TCPsock.setsockopt(socket.SOL_SOCKET,
socket.SO_REUSEADDR, 1)
TCPsock.settimeout(delay)
try:
TCPsock.connect((ip, port_number))
output[port_number] = 'Listening'
except:
output[port_number] =
def scan_ports(host_ip, delay):
threads = []
# To run TCP connect concurrently
output = {}
# For printing purposes
# Spawning threads to scan ports
for i in range(10000):
t = threading.Thread(target=TCP_connect, args=
(host_ip, i, delay, output))
threads.append(t)
# Starting threads
for i in range(10000):
threads[i].start()
# Locking the main thread until all threads complete
for i in range(10000):
threads[i).join()
# Printing listening ports from small to large
for i in range(10000):
if output[i] == 'Listening':
print(str(i) + ': '+ output[i])
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