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RemyCC: best TCP algorithms from MIT AI

https://sudonull.com/remycc-best-tcp-algorithms-from-mit-ai

Learn how Remy generates congestion control for TCP that surpasses Cubic and Compound TCP. ns-2 test results, application for dev. Optimize your network stack.

TCP server in iOS on POSIX sockets

https://sudonull.com/tcp-server-in-ios-on-posix-sockets

Implementation of TCP server in iOS app via BSD sockets. POSIX API, HTTP parsing, file serving. Code and explanations for middle/senior iOS dev. Test locally.

OSI TCP/IP Network Models: Protocols and Vulnerabilities

https://sudonull.com/osi-tcp-ip-network-models-protocols-and-vulnerabilities

Complete reference on OSI and TCP/IP models, protocols from Ethernet to QUIC. Layers, PDU, security risks, commands for middle/senior developers. Study network structures.

CVE-2026-4247 FreeBSD TCP DoS Vulnerability

https://sudonull.com/cve-2026-4247-freebsd-tcp-dos-vulnerability

Analysis of CVE-2026-4247: mbuf leak in TCP Challenge ACK FreeBSD. Attack vectors, sysctl fix, branch patches. Update systems to protect against remote DoS.

ICMP tunnel in the Linux kernel: TCP/UDP encapsulation

https://sudonull.com/icmp-tunnel-in-the-linux-kernel-tcp-udp-encapsulation

How to implement an ICMP tunnel in the Linux kernel for TCP/UDP traffic encapsulation. Code analysis, Netfilter hooks and working with sk_buff. Useful for middle/senior developers.

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