Distributed Denial-of-Service (DDoS) attacks overwhelm systems with traffic. Volumetric attacks consume bandwidth, protocol attacks exploit weaknesses in TCP/IP, and application-layer attacks target services like HTTP. Mitigation often involves traffic scrubbing centers and rate limiting.

Transport Layer Security (TLS) encrypts data in transit. Certificates bind public keys to domain names and must be issued by trusted certificate authorities. Expired or misconfigured certificates can cause outages. Automated certificate lifecycle management reduces operational risk.

Virtual LANs (VLANs) logically segment networks without physical separation. This reduces broadcast domains and improves performance. From a security perspective, VLANs limit lateral movement between departments or device types. However, they must be paired with proper access control lists (ACLs) to be effective.

Intrusion Detection Systems (IDS) monitor traffic and generate alerts. Intrusion Prevention Systems (IPS) actively block malicious traffic in real time. IDS is typically passive, while IPS sits inline. Both rely on signature-based and behavioral analysis to detect threats.

DNSSEC adds cryptographic signatures to DNS records, allowing clients to verify authenticity. Without DNSSEC, attackers can perform cache poisoning attacks. While DNSSEC does not encrypt DNS traffic, it ensures integrity. Deployment requires careful key management and coordination across DNS zones.

Firewalls inspect and filter traffic between networks based on defined rules. Traditional firewalls focus on IP addresses and ports, while next-generation firewalls add deep packet inspection and application awareness. Proper rule management and regular audits are crucial. Misconfigured rules are a common source of security gaps.

Address Resolution Protocol (ARP) spoofing occurs when an attacker sends falsified ARP messages to associate their MAC address with a legitimate IP address. This enables man-in-the-middle attacks. Mitigation techniques include dynamic ARP inspection, static ARP entries for critical systems, and network segmentation. Monitoring unusual ARP traffic patterns is also essential.

Zero Trust assumes no device or user is inherently trustworthy, even inside the corporate network. Instead of relying on perimeter defenses, every access request is authenticated, authorized, and encrypted. Technologies like multi-factor authentication, device posture checks, and microsegmentation are key components. Zero Trust reduces lateral movement and limits the blast radius of breaches.

Why SSL Inspection Is Needed

Test update 13 Feb.

Today, the vast majority of web traffic is encrypted using SSL/TLS (Secure Sockets Layer / Transport Layer Security). While encryption protects users’ privacy and sensitive data, it also creates a blind spot for security tools. Malware, phishing payloads, command-and-control traffic, and data exfiltration can all hide inside encrypted connections.

Without SSL inspection, firewalls and secure web gateways can see where traffic is going—but not what is inside it.

Web filtering is a technology used to control which websites and online content users can access. It is widely deployed by businesses, schools, and public institutions to improve security, ensure appropriate usage, and maintain productivity.

How Web Filtering Works

At its core, web filtering evaluates internet traffic against predefined rules. These rules may be based on: