Introduction
As a continuous learner of Linux and Python technologies, we know that network security has become increasingly important in today's information age. And as an important part of network security, network defense plays a key role in automation. This article will teach you how to use Python to write scripts to achieve automated network defense and protect your network security.
Practical Case#
Example 1: Automatically detect and block malicious IPs#
import subprocess
def check_ip(ip):
result = subprocess.run(['whois', ip], capture_output=True, text=True)
whois_data = result.stdout
if "Bad IP" in whois_data:
block_ip(ip)
def block_ip(ip):
subprocess.run(['iptables', '-A', 'INPUT', '-s', ip, '-j', 'DROP'])
print(f"Malicious IP address blocked: {ip}")
# Simulate IP detection and blocking
check_ip("1.2.3.4")
Example 2: Automatically update firewall rules#
import datetime
import subprocess
def update_firewall_rules():
antivirus_servers = ["10.1.1.1", "10.1.1.2", "10.1.1.3"]
for server in antivirus_servers:
subprocess.run(['iptables', '-A', 'INPUT', '-s', server, '-j', 'ACCEPT'])
print(f"{datetime.datetime.now()} - Firewall rules updated")
# Periodically execute firewall rule updates
update_firewall_rules()
Example 3: Automatically crawl vulnerability information and send email notifications#
import requests
import smtplib
from email.mime.text import MIMEText
def crawl_vulnerabilities():
# Code for crawling vulnerability information, specific implementation is omitted here
vulnerabilities = get_vulnerabilities()
send_email(vulnerabilities)
def send_email(vulnerabilities):
msg = MIMEText(f"Found the following vulnerabilities:\n{vulnerabilities}")
msg['Subject'] = 'Network Vulnerability Notification'
msg['From'] = '[email protected]'
msg['To'] = '[email protected]'
server = smtplib.SMTP('smtp.example.com')
server.send_message(msg)
server.quit()
# Execute vulnerability crawling and email notification on a regular basis
crawl_vulnerabilities()
Conclusion#
This article provides three examples of implementing automated network defense using Python, including automatically detecting and blocking malicious IPs, automatically updating firewall rules, and automatically crawling vulnerability information and sending email notifications. These examples demonstrate the powerful application capabilities of Python in the field of network security, which can greatly improve the effectiveness of network security defense.