How ports, proxies, and VPNs become security liabilities

This cluster highlights how core connectivity tools—ports, proxies, and VPN clients—are being weaponized or tightly controlled for security. One post explains why ISPs block certain ports at the edge using firewall filtering, balancing abuse prevention with user needs. Another examines emerging standards for QUIC-aware HTTP proxies and stresses rate-limiting and other defenses, while a separate analysis shows how reverse proxies can become attack vectors when trust and routing assumptions fail. Finally, threat intel on Storm-2561 details how criminals spoof legitimate enterprise VPN clients from major vendors to steal credentials, underscoring how even security products themselves can become powerful phishing lures.