https://netacoding.com/tags/stateful-inspection-bypass/ Recent content in Stateful-Inspection-Bypass on Netacoding | Cybersecurity, Assembly & Network Research https://netacoding.com/img/logo-netacoding.png https://netacoding.com/img/logo-netacoding.png Hugo en-us Fri, 27 Mar 2026 00:00:00 +0000 https://netacoding.com/posts/icmp_encapsulation/ Fri, 27 Mar 2026 00:00:00 +0000 https://netacoding.com/posts/icmp_encapsulation/ ICMP Type 3 (Destination Unreachable) mandates reflection of the original IP header plus 8 bytes — a field attackers control entirely. Nested ICMP encapsulates secondary protocol headers inside the mandatory reflection segment, bypassing stateful firewalls that classify Type 3 as benign error traffic. 0xFFFF boundary manipulation causes DPI engines to misidentify packet boundaries and skip payload analysis.