Presented by : Aazim Rashid
Roll No : ECE-22-50
Introduction to
Network Security
Network security is the practice of protecting a computer network
from unauthorized access, data breaches, and other cyber threats.
It's crucial for safeguarding sensitive information and ensuring the
reliable operation of digital systems.
Importance of Network Security
1 Data Protection 2 Business Continuity
Safeguarding sensitive Preventing network disruptions
information, such as customer and ensuring the smooth
data, financial records, and operation of critical business
intellectual property, from theft processes and applications.
or misuse.
3 Compliance 4 Reputation
Adhering to industry regulations Maintaining the trust of
and standards to avoid legal customers, partners, and
and financial penalties. stakeholders by demonstrating
a strong commitment to
cybersecurity.
Common Network Security Threats
1 Malware 2 Hacking Attempts
Malicious software like viruses, worms, and Unauthorized access to networks and systems
Trojans that can compromise system integrity through exploits, password cracking, and other
and steal data. methods.
3 Distributed Denial of Service 4 Social Engineering
(DDoS)
Floods of traffic that overwhelm and disrupt Manipulative tactics that trick users into
network services. revealing sensitive information or performing
harmful actions.
Intrusion Detection and Prevention
Systems
1 Monitoring
Intrusion Detection Systems (IDS) continuously monitor network traffic
and system activity for signs of malicious behavior.
2 Analysis
IDS use various techniques like signature-based, anomaly-based, and
behavioral analysis to detect potential threats.
3 Response
Intrusion Prevention Systems (IPS) can automatically block or mitigate
detected threats in real-time to protect the network.
Firewall Fundamentals
What is a Firewall? Types of Firewalls Firewall Configurations
A firewall is a network security Firewalls can be hardware- Firewalls can be configured to
device that monitors and controls based, software-based, or a allow, block, or monitor specific
incoming and outgoing network combination. They can use types of network traffic to protect
traffic based on pre-defined different filtering methods like against threats.
security rules. packet inspection, application-
level control, and stateful
monitoring.
Firewall Configuration and
Management
Defining Rules
Establishing a set of rules to control inbound and outbound traffic
based on various criteria, such as IP addresses, ports, and
protocols.
Network
Segmentation
Dividing the network into smaller, isolated segments to limit the
spread of threats and control access between different zones.
Monitoring and
Logging
Regularly reviewing firewall logs to detect and investigate
suspicious activity, and making necessary adjustments to the
configuration.
Encryption and
VPNs
Encryption
Converts data into a coded format to protect it from unauthorized access, ensuring confidentiality.
Virtual Private Networks
(VPNs)
Establishes a secure, encrypted connection between a device and a remote network, enabling private
and anonymous communication.
SSL/TLS
Cryptographic protocols that provide secure communication over the internet, protecting data in transit.
Key Management
The processes and procedures for generating, distributing, and protecting the cryptographic keys used
Secure Network Protocols
TCP/IP
The fundamental protocols that enable communication on the internet
and most modern networks.
HTTPS
The secure version of HTTP, providing encrypted communication for web
browsing and e-commerce.
SSH
Secure Shell, a cryptographic network protocol for secure remote access
and file transfers.
SFTP
Secure File Transfer Protocol, a secure alternative to traditional FTP for
transferring files.
Wireless Network Security
WPA/WPA2
Encryption standards that provide stronger security for wireless networks compared
to older WEP.
802.1X
Authentication
A framework for port-based network access control that enhances wireless network
security.
Wireless IDS/IPS
Specialized systems that monitor and protect wireless networks from unauthorized
access and attacks.
Policy Enforcement
Implementing and enforcing security policies for wireless network usage, devices,
and access.
Best Practices for Network Security
Regular Software Updates Patching systems and applications to address
known vulnerabilities.
Strong Access Controls Implementing robust user authentication, multi-
factor authentication, and access management.
Comprehensive Monitoring Continuous monitoring of network traffic, system
logs, and security events.
Incident Response Plan Establishing a well-defined plan to detect, respond
to, and recover from security incidents.
Employee Education Training users on security best practices, threat
awareness, and reporting procedures.
