Category: Cybersecurity - Page 2

Nov 23, 2025

Failed Port Scan Attempts: Common Mistakes and How to Avoid Them

Learn why port scans fail and how to fix them with realistic techniques. Avoid common mistakes like aggressive timing, flagged IPs, and misreading firewall responses to improve your network reconnaissance success.

Nov 11, 2025

Webhook Security for VoIP: HMAC Signatures and IP Allowlisting Explained

Learn how to secure VoIP webhooks with HMAC signatures and IP allowlisting to prevent fraud, data theft, and compliance violations. Essential for Twilio, Vonage, and Plivo integrations.

Oct 22, 2025

ZRTP in VoIP: How End-to-End Media Encryption Works with Key Verification

ZRTP provides true end-to-end encryption for VoIP calls by negotiating keys directly between devices and using user-verified Short Authentication Strings. Unlike server-based encryption, no third party can access your voice data.

Oct 15, 2025

SIP Brute-Force Attack Defense: Rate Limits, Fail2ban, and Strong Authentication

SIP brute-force attacks target VoIP systems with automated password guesses. Learn how rate limiting, Fail2ban, and strong authentication work together to stop them before they cost you thousands.

Sep 21, 2025

Least Privilege in VoIP Admin: How RBAC and Access Segmentation Stop Toll Fraud and Data Breaches

Least privilege in VoIP administration using RBAC and access segmentation prevents toll fraud, insider threats, and data breaches. Learn how role-based controls and network isolation stop 83% of common VoIP attacks.

Aug 14, 2025

NIST VoIP Security Best Practices: SP 800-58, 800-171, and 800-53 Explained

Learn how to secure VoIP systems using NIST SP 800-58, 800-171, and 800-53. Get practical steps for encryption, SBCs, authentication, and compliance with real-world examples.