Field notes, essays, and practical writing on networking, cloud, security, and operations.https://nsayeed.com/https://nsayeed.com/an-introduction-to-cybersecurity-in-satcom-threats-defences-and-future-challenges/https://nsayeed.com/an-introduction-to-cybersecurity-in-satcom-threats-defences-and-future-challenges/Satellite communication powers navigation, internet, broadcasting, and critical infrastructure. As Starlink and mega-constellations grow, the attack surface expands. This post introduces SATCOM security threats, defenses, and future challenges.Wed, 03 Sep 2025 00:00:00 GMTGeneralNabil Sayeedhttps://nsayeed.com/zero-trust-network-access-microsoft-entra-private-access/https://nsayeed.com/zero-trust-network-access-microsoft-entra-private-access/Following on from my introduction to Zero Trust Network Access (ZTNA) , this post focuses on the deployment and configuration of Entra Private Access.Fri, 18 Apr 2025 00:00:00 GMTGeneralNabil Sayeedhttps://nsayeed.com/zero-trust-network-intro/https://nsayeed.com/zero-trust-network-intro/An introduction to Zero Trust Network Access (ZTNA). Explore how ZTNA addresses traditional VPN security challenges, simplifies management, and enhances user experience in hybrid cloud environments. Follow-up posts will cover Microsoft and Cloudflare ZTNA solutions.Tue, 08 Apr 2025 00:00:00 GMTZeroTrustNabil Sayeedhttps://nsayeed.com/home-lab-series-the-setup/https://nsayeed.com/home-lab-series-the-setup/Explore the key technologies powering my home lab setup, including Tailscale, Cloudflare Tunnels, Immich, Home Assistant, and Frigate. Learn how I use these tools for secure remote access, smart home automation, local AI-powered surveillance, and self-hosted photo storage.Sat, 05 Apr 2025 00:00:00 GMTGeneralNabil Sayeedhttps://nsayeed.com/ai-agents-cybersecurity-lessons-from-building-ai-powered-workflows-with-n8n/https://nsayeed.com/ai-agents-cybersecurity-lessons-from-building-ai-powered-workflows-with-n8n/In recent years, we’ve seen the letters ‘AI’ appear almost everywhere, driven by the rise of large language models (LLMs). More recently, the concept of " AI agents", AI-powered automation capable of making decisions and taking actions, has gained significant traction.Sun, 30 Mar 2025 00:00:00 GMTGeneralNabil Sayeedhttps://nsayeed.com/guide-openvpn-access-server-lets-encrypt/https://nsayeed.com/guide-openvpn-access-server-lets-encrypt/OpenVPN access server is a tool that allows for the rapid installation & configuration of a VPN server. It is commercial software however the ‘free’ license allows for 2 concurrent connections.Sat, 13 Mar 2021 00:00:00 GMTGeneralNabil Sayeed