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Plain-language guides to online privacy and VPN technology, plus updates from VPNRice.

Linux epoll (EPOLLET, EPOLLONESHOT): Scalable I/O for High-Concurrency VPNs

Deep technical guide to Linux epoll, edge-triggered EPOLLET, and EPOLLONESHOT patterns to eliminate thundering herd and scale multi-threaded VPN concentrators.

November 14, 2026 · 6 min read

Performance
Linux SR-IOV and Macvtap: Hardware I/O Virtualization for Multi-Tenant VPNs
November 14, 2026 · 6 min read
Security
Linux TC Flower (cls_flower): Wire-Speed Hardware Offload for VPN Gateways
November 14, 2026 · 6 min read
Privacy
DiffServ RFC 2983 and DSCP Metadata Leakage in Encrypted VPN Tunnels
November 13, 2026 · 7 min read
Performance
Linux Byte Queue Limits (BQL) and Driver Bufferbloat in VPN Gateways
November 13, 2026 · 8 min read
Performance
Linux eBPF XDP_REDIRECT: devmap and cpumap for Line-Rate VPN Gateways
November 13, 2026 · 5 min read
Performance
Linux Foo-over-UDP and GUE RFC 8150: Line-Rate UDP Encapsulation for VPN Overlays
November 13, 2026 · 7 min read
Performance
Linux kTLS and Hardware Crypto Offload: Zero-Copy VPN Relay Architecture
November 13, 2026 · 6 min read
Performance
Linux Netfilter Flowtable: Fastpath Software and Hardware Offload for VPNs
November 13, 2026 · 6 min read
Performance
Linux Page Pool: Driver-Level Memory Recycling for High-Rate VPN Gateways
November 13, 2026 · 6 min read