Monthly Archives: September 2026

"Tech Expert Wang" provides a detailed explanation of OpenWrt’s core value, device selection, and the secure flashing process: from DNS ad filtering and SQM traffic management to remote access, while also addressing performance limitations, the risk of bricking, and recovery preparations.

Software routers and "Airport" solutions handle traffic routing and nodes, while commercial VPNs provide "a backup option when things get inconvenient." In this article, I’ll start by thoroughly covering ExpressVPN—my go-to service—and then compare NordVPN, Surfshark, and AdGuard VPN based on different trade-offs, including pricing, number of supported devices, refund policies, and anti-blocking mechanisms. All pricing information is taken directly from the official websites of these four providers as of September 24, 2026, and does not include speed test data from this site.

Is your VPS's internet speed too slow? Enable BBR congestion control for an immediate boost in download speeds. Using BandwagonHost as an example, this article walks you through the entire process in five easy steps—from checking the kernel and enabling the module at startup to configuring and verifying sysctl settings—complete with troubleshooting tips and a guide to choosing a BandwagonHost plan.

fnOS (Feiniu NAS) SSH: Do you have to enter a password every time you use `sudo` during operations? This article explains how to set up password-less `sudo` using `visudo` and `/etc/sudoers.d`, allowing you to enable password-less access only for specific commands, and includes instructions for verification and revocation.