Complete Network Security: Get Certified in Cyber Security

Explore network design elements like DMZ, VLAN, and subnetting, and how NAT, remote access, and cloud computing with IoT enable layered security and defense in depth.

Explore network address translation, its static, dynamic, and port address translation variants, and how network access control policies, remote access services, and telephony expose and protect enterprise networks.

Explore virtualization as the core of cloud computing, creating multiple virtual machines and environments with a hypervisor, and review server, desktop, data, and os virtualization alongside saas, iaas, and paas.

Explore Internet of things as interconnected devices with unique identities that exchange data. Apply defense in depth across network, platform, application, data, and response layers to protect resources.

Explore essential terminologies and network security concepts, including data breach, vulnerability, attack, exploit, botnet, dark web, threat, zero day attack, payload, and the security goals: confidentiality, integrity, availability, authenticity, non-repudiation.

Explore passive vs. active network attacks and key techniques like wiretapping, port scans, idle scans, reconnaissance, and encryption threats, including data modification and eavesdropping.

Explore active network attacks that modify data and disrupt operations. Learn about malware types such as viruses, worms, trojans, rootkits, botnets, spyware, keyloggers, and ransomware, plus spoofing and eavesdropping.

Explore how attackers craft malware such as viruses and worms using GPS Virus Maker to test and validate antivirus and anti-malware defenses in a network security context.

Explore how hackers create http rat trojans, a remote access trojan that uses port 80 and web interfaces to gain remote control of a victim's machine, highlighting dangerous web-based threats.

Learn how spytech spy agent enables system monitoring and surveillance for network security admins, covering keystrokes, app and website activity, screenshots, microphone and webcam capture, and stealth logging.

Explore how keyloggers capture keystrokes to monitor device activity with an all-in-one keylogger setup. Understand network security monitoring for employee activity while recognizing potential illegal uses by hackers.

Explore denial-of-service concepts with the Loic tool, compare Loic and Hoic, and demonstrate configuring a target, attack options, and observing the test system's response.

Explore how the high orbit ion cannon enables high-speed DoS and DDoS testing for internal networks, highlighting its open-source nature and defensive strategies to monitor traffic and block malicious IPs.

Learn to perform http flood testing with a ddos http tool on Windows, configuring asynchronous sockets, target url, port designation, and url verification to assess web server performance.

Explore password based attacks, including non-technical methods such as dumpster diving, social engineering: phishing and baiting, and technical methods like password guessing, dictionary and brute force attacks, and keyloggers.

Learn how hackers exploit default passwords and why administrators must change them to protect devices and networks from password attacks.

Learn how loft crack audits and recovers Windows passwords using dictionary, brute force, hybrid attacks, and rainbow tables. Apply practical steps to test password strength and remediate weak credentials.

Identify network security vulnerabilities as common loopholes attackers exploit, including missing patches and weak passwords. Address these risks with patch management, firewall review, encryption, and USB drive controls.

Implement the account lockout policy in Windows to prevent unauthorized access after a defined number of failed login attempts and configure duration and reset timing in Local Security Policy.

Learn how cryptography protects information via symmetric and asymmetric encryption, transforming plaintext into ciphertext with keys, and using hash functions for data integrity.

Explore data encryption and decryption with Advanced Encryption Package, covering symmetric and RSA-based algorithms, secure file deletion, and creating encrypted self-extracting files for easy sharing.

Explore how Windows password hashes are stored in the SAM database and how to assess their crackability. Identify NTLM and LM hashes and audit password strength using hash cracking tools.

Learn how steganography hides sensitive data in an image using OpenStego, including data hiding, extraction, and watermarking to detect unauthorized copying.

Define and enforce network security policies that outline rules for accessing network resources, protect integrity, mitigate threats, and ensure secure, reliable network access.

Explore network security devices such as firewalls, IDS/IPS, VPN concentrators, proxies, load balancers, and secure web gateways, and learn how they enforce policies, filter traffic, and protect servers.

Configure the Tor browser as a proxy network to hide your identity and protect privacy with onion routing and multiple proxies, including new identity and bridge settings for censorship avoidance.

Learn to use the prtg network protocol analyzer to monitor and log traffic, filter by netflow, sflow, and jflow, and access results via web, windows, or mobile.

Explore the fundamentals of intrusion detection systems and intrusion prevention systems, and how IDS and IPS defend networks by detecting, preventing, and responding to growing threats and malware.

Describe network intrusions and how an intrusion detection system monitors inbound and outbound traffic for anomalies using signatures, alerts administrators, and logs incidents, while remaining a detection, not prevention, tool.

Explore how an intrusion detection system collects network traffic, uses signature-based or anomaly-based models to detect intrusions, and protects the DMZ via a decision engine.

Discover intrusion detection system types, including network-based and host-based IDs, and explore signature based and anomaly based detection methods. Apply these to protect networks and individual computers.

Explore how intrusion prevention systems detect and automatically block malicious traffic, compare them with intrusion detection systems, and review inline deployment and IPS types like NIPS, WIPS, NBA, and HIPS.

Explore intrusion detection systems and intrusion prevention systems concepts, including signature, anomaly, and policy based prevention, and compare detection versus blocking with snort, security onion, and suricata for network security.

Detect intrusions with Snort IDS on Linux or Windows by installing rules, configuring home and external nets, starting the service, and analyzing real-time traffic and alerts.

Learn how firewalls create a boundary between trusted intranet and the untrusted internet, inspect packet headers, and block malicious traffic to defend networks.

Understand how firewalls analyze inbound and outbound traffic against predefined rules, filtering packets at network ports by source and destination addresses using accept, drop, or reject actions.

Learn to turn Windows Firewall on or off for private and public networks via Control Panel, block or allow apps, and enable notifications for new blocked apps.

Learn how to allow an app through Windows Firewall, including adding, changing, or removing allowed apps and ports, while assessing risks and applying rules for private and public networks.

Create inbound and outbound Windows firewall rules using advanced settings. Configure port rules (TCP 21) and manage profiles, IPsec options, and rule export/import for monitoring and reuse.

Explore firewall generations and types, from packet filtering to next generation firewalls, including stateful inspection, and compare network based firewalls with web application firewalls across the OSI layers.

Learn how next generation firewalls use deep packet inspection to inspect headers and payloads, enabling encrypted traffic inspection, intrusion prevention, antivirus, and unified threat management for comprehensive network security.

Explore firewall limitations as threat landscapes evolve, including bypass methods, encryption, password policies, social engineering, and the need for network, host, and web application firewalls plus ids/ips.

Identify firewall threats and vulnerabilities, including insider attacks, patch gaps, misconfigurations, and DDoS risks. Adopt next-generation firewalls with deep packet inspection and a full threat-protection suite.

Know your network architecture to craft precise firewall rules. Form a change control board, document rules with comments, avoid any in allow rules, and review and organize rules for performance.

Explore wireless network security in IEEE 802.11 environments, uncover threats and vulnerabilities, and practice Wi-Fi security testing through hands-on exercises from a hacker's perspective.

Explore how wireless networks use radio waves to connect devices at the physical layer and learn about access points, ssid, bssid, and bandwidth for secure connections.

Explore the evolution of wireless network standards, from 802.11 basics to 802.11n, detailing speeds up to 600 Mbps, 2.4 and 5 GHz bands, and OFDM/MIMO tech.

Identify wifi threats and vulnerabilities, including rogue access points, ad hoc networks, session hijacking, evil twin attacks, replay attacks, dictionary and brute force attacks, and WPA and WPA2 weaknesses.

Explore wireless network security standards from WEP to WPA3, detailing legacy weaknesses, stronger encryption with AES in WPA2, PSK and enterprise modes, and features like forward secrecy and opportunistic encryption.

Identify wireless vulnerabilities and encryption weaknesses through wireless security testing, including pen testing and vulnerability analysis. Patch flaws in Wi-Fi networks and prevent rogue access points.

Learn to crack WPA/WPA2 networks with Aircrack-ng on Kali Linux by capturing the handshake and using a dictionary attack to reveal the pre-shared key, and explore WPA3 protection.

Change default ssids and passwords, update firmware, and enable firewalls to secure wireless networks and enable isolation. Use vpn for access, enforce two-factor authentication, and monitor logs for suspicious activity.

Master sniffing and spoofing concepts, learn how packet sniffers work in promiscuous mode, and protect your network with encryption and secure protocols like https; explore Wireshark and tcpdump.

Explore passive versus active sniffing, showing how hubs broadcast traffic and switches forward to specific hosts, then review ARP poisoning, MAC flooding, DHCP attacks, and DNS cache poisoning.

Explore packet sniffers like Omnipeek, Windump, and Tcpdump to capture and categorize network traffic by protocol, enabling troubleshooting and detection of malicious activity.

Learn to sniff wireless traffic using Omnipeek network analyzer to monitor and capture packets, analyze top talkers by IP, and inspect protocols like ARP, HTTP, HTTPS, and ICMP.

Sniff network traffic with tcpdump on Kali Linux, learn to select interfaces, capture limits, save and read pcap files, and filter by protocol and port.

Sniff network traffic with Windump, the Windows version of tcpdump, learning to install Winpcap, capture on adapters and ports, and save or read pcap files.

Empower your network security skills by using Wireshark, an open-source packet analyzer, to sniff traffic and extract credentials from HTTP post requests, and learn why HTTPS protects passwords.

Learn to sniff network traffic with Wireshark, capture post requests to reveal credentials, and reinforce secure protocols like https to prevent credential exposure.

Explore spoofing concepts in network security, including email, caller ID, MAC, IP, ARP, and DNS spoofing, and how attackers pretend to be trusted to deceive systems.

Learn how network traffic monitors capture and analyze traffic with tools like tcpdump and Wireshark to detect abnormal activity, block malicious traffic, and safeguard network availability.

Explore network traffic analysis using tcpdump on Linux, windump on Windows, and Wireshark for real-time, gui-based packet capture, filtering, and troubleshooting in security practice.

Analyze network traffic with tcpdump on Kali Linux, capture IPs and ports, inspect UDP/TCP packets, save to a pcap, and identify malicious activity for blocking.

Explore network traffic analysis with Wireshark to capture packets on a Wi-Fi interface, filter by IP or protocol, colorize and decode packets, and save exports for incident investigations.

Master network scanning basics to identify live hosts, open ports, and running services. Apply techniques like port scanning, firewall detection, and OS detection using Nmap and Nessus with hands-on practice.

Create and test custom packets with Colasoft Packet Builder, using decoder and hex editors to configure UDP, TCP, IP, and other templates, and verify firewall and sniffer behavior.

Identify live hosts in a network using ping and ping sweep, via icmp echo requests and replies, to determine active systems, services, ports, and protocols for initial network scanning.

Learn how to check live systems using ping and nmap on Kali Linux, scanning single hosts, domains, ranges, and subnets to identify live targets and open ports.

Use Nmap to check open and closed ports on live hosts, learning six port states and how filtering devices and firewalls affect security.

Learn to identify live hosts and view port status by using ping and ping sweep, and scan single, domain, range, or subnet targets with nmap on Kali Linux and Windows.

Explore Nmap scan techniques and how they reveal port states, using tcp connect, stealth, xmas, fin, null, idle, icmp echo scans, and udp or tcp flag methods.

Explore nmap scan techniques, including ICMP echo and list scans to identify live hosts, and learn UDP, inverse TCP flag scans, and ACK flag scans to determine port status.

Explore nmap scanning techniques, including tcp connect scan, udp scan, tcp syn scan, operating system detection, and script-based scanning to identify services and the target OS.

Explore the Nmap scripting engine (NSE) and how it extends Nmap to enable enhanced network discovery and version detection. Detect vulnerabilities, malware detection, and exploit weaknesses with NSE-powered scans.

Master the Nmap scripting engine (NSE) via the Zenmap GUI, explore scripting commands, run HTTP headers and other scripts to assess FTP, SSH, and firewall vulnerabilities on targets.

Explore vulnerability scanning after identifying live hosts and ports, using banner grabbing to determine the target OS, and apply automated scanners such as Nessus and GFI to find exploitable weaknesses.

Identify the target's operating system and server details through banner grabbing with nmap on Kali Linux, using the banner script to reveal service headers and OS information.