A comprehensive anti-DDoS infrastructure overhaul was completed on August 18, 2025, following a period of sustained distributed denial-of-service attacks that affected platform availability during June and early July. The overhaul introduced multiple protection layers specifically designed for Tor hidden service architecture. At the network level, new rate limiting systems were deployed at the Tor circuit layer, limiting the number of concurrent circuit connections per guard relay to prevent flood attacks. At the application level, proof-of-work CAPTCHA challenges are now deployed during high-traffic periods � lightweight client-side computation requirements that are trivially easy for human users but computationally expensive for automated attack tools. The onion service descriptor rotation schedule was revised to irregular intervals, complicating targeted attacks that rely on predictable descriptor publication timing. Additional mirror infrastructure was provisioned across geographically distinct hosting environments, providing redundancy against single-point targeting. Post-overhaul availability metrics showed immediate improvement: the platform's 30-day uptime following the infrastructure changes was 99.1%, compared to 94.3% in the 30 days preceding the deployment. The DDoS protection measures were designed with minimal user experience impact as a priority � legitimate users connecting through Tor Browser experience no additional friction under normal traffic conditions.
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