I-server is a networking project that hides a server's identity from clients by using ICMP Echo Reflection and ICMP Destination Unreachable packets to relay communications indirectly through third-party servers, making it difficult to identify the actual server IP from network traffic analysis alone.
The U.S. military's dependence on GPS has become a vulnerability as adversaries develop jamming, spoofing, and anti-satellite capabilities. Celestial navigation systems, previously automated during the Cold War era, may offer a proven backup for operations in GPS-denied environments.
A third of European companies with DMARC records lack reporting addresses, leaving their email authentication policies blind to spoofing and misconfigurations. Among those with reporting configured, most send feedback to external domains rather than their own, distributed across thousands of providers.