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dengisan.nl

Proactive digital defense,
run in the open.

A community built around real technical work — security, reverse engineering and binary exploitation, network engineering — with a forum for discussion and hands-on CTF challenges backed by actual hardened sandboxes, not just write-ups.

What's here

Not a landing page for a product — an actual forum, actual challenges spanning security, reverse engineering, and network engineering, backed by infrastructure we built and hardened ourselves.

Ready to try one?Free

Free challenges to start, a premium tier for the harder ones. Leaderboard's live.

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