CatCat Blog - Tech Sharing and Life Insights

A step-by-step guide to registering with Netcup tax-free: how to prepare an English billing document, claim and redeem coupons, choose data center locations and contract periods, and complete identity verification and payment. Includes detailed tips on avoiding contract and location surcharges, understanding traffic/bandwidth rules, and cancelling VPS orders correctly so you can secure high-performance Netcup servers at low cost.

A continuously updated shortlist of high-value VPS providers, focusing only on instances I personally own and have benchmarked long term. Covers Hetzner, Crunchbits, Liteserver, Netcup, and more, with detailed benchmarks and purchase links. Ideal for users running websites, side projects, off-site downloads, or seeking solid performance per dollar.

A curated collection of commonly used VPS scripts: system benchmark and health checks (Yabs/GB5), the all‑in‑one Go toolkit, routing and unlock/streaming tests, plus one‑click installers for Docker, Zsh, qBittorrent, proxy tools, Snell, and more. Includes NVM setup and China/global mirror accelerators—copy, paste, and run.

Continuously updated recommendations of my own go‑to “airports”: in‑depth benchmarks of YToo and Huayun, both premium dedicated‑line providers with multi‑protocol support, low‑multiplier high‑value nodes, wide POP coverage including IPv6 and EMBY, plus TAG and QingYunTi for rare regions and IPLC. Pricing details, annual plan caveats, bandwidth limits, and usage tips to help you pick a stable, hassle‑free ladder.

Twikoo comment notifications keep failing with 401 errors? This post traces the root cause to Vercel’s default authentication protection, walking through how logs reveal the issue and how to fix it: disable project-level auth protection so Twikoo’s internal POST_SUBMIT requests can pass through and restore Telegram and other notification channels.

This article walks through building a unified, secure, and auditable access gateway using Teleport. It explains core concepts and architecture, covers SSH/Kubernetes/DB/application/desktop access, zero-trust and auditing features, then provides a hands-on Docker-based deployment guide and shows how to enroll additional servers into the Teleport cluster.

This guide walks through installing NVIDIA GPU drivers with CUDA support on Ubuntu 22.04, including prerequisite packages, Vulkan libraries, CUDA Toolkit, and Clang. It also covers setting up Docker and NVIDIA GPU support for containers via nvidia-docker2, and verifying that the GPU, CUDA environment, and GPU-enabled Docker runtime are working correctly.

Amid rising hardware and cloud costs in late 2025, LET’s floor price has climbed to $10 and memory vendors are hiking contract prices sharply. This post records my Black Friday 2025 hauls: Netcup RS2000, HostBrr flash‑sale storage VPS, Hetzner AX162‑S dedicated server, plus the S.EE short‑link & analytics platform, with configs, YABS benchmarks and buying notes for seeding/backup use cases.

Hands-on benchmark of GorillaServers’ dual EPYC 7502 clearance server from WebNX: 128 threads, 512GB RAM, 2×1.92TB NVMe and 1Gbps network in LAX. Covers CPU and network performance, storage health, Geekbench/PassMark/UnixBench results, WebNX upstream advantages, Tenantos automation, overall value and potential drawbacks for high-bandwidth workloads on a budget.

Black Friday deals are here. This in-depth HostBrr Threadripper 9995WX VPS Benchmark compares it head‑to‑head with the 9950X and EPYC 9655, analyzing raw performance, overselling risks, and value for money. It also breaks down package pricing, StorageBox and block storage promotions, and offers practical buying advice for different workloads and budgets.

Hands-on Black Friday benchmark of Hetzner AX162-S: EPYC 9454P with 48 cores / 96 threads, DDR5 ECC and Gen4 NVMe. YABS sequential throughput over 5 GB/s, Geekbench 6 multi-core around 19,000. At €199/month, this DuFu-series dedicated server still offers outstanding price‑performance despite Hetzner’s slower recent updates.