DanielLavrushin/b4

Health v2 · maintenance only

Adoption not part of the score

1714 stars · 70 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

B4 (Bye Bye Big Bro) is a Linux service that bypasses Deep Packet Inspection (DPI) censorship by rewriting network packets via fragmentation, faking, and header modification. It runs on routers, servers, and desktops, managed through a built-in web UI with automatic strategy discovery and per-set routing rules.

Use cases

• unblock websites blocked by my ISP's DPI
• bypass deep packet inspection on my router
• make YouTube work when my provider blocks it
• automatically find a working DPI bypass strategy for my connection
• route specific domains through a VPN or SOCKS5 proxy
• block ads and trackers network-wide on OpenWrt
• protect my whole home network from censorship without client setup

When to choose

• you need transparent, network-wide DPI bypass on a Linux router (OpenWrt, ASUS Merlin, Keenetic, MikroTik)
• you want automatic discovery of working bypass strategies instead of manual tuning
• you need per-domain or per-device routing rules with a friendly web UI
• you want DNS-level handling (DoH, fragmented queries) combined with packet-level bypass

When to avoid

• you need a simple VPN or proxy client rather than packet-level DPI evasion
• your platform is not Linux or lacks NFQUEUE/TUN kernel support
• you need a GUI desktop application for a single device with no root access
• your threat model requires anonymity rather than unblocking (b4 does not hide your identity)

Facets

service · maturity active

security privacy networking proxy self-hosted censorship-circumvention privacy networking security self-hosted self-hosted dpi-bypass packet-fragmentation xray openwrt asuswrt-merlin router web-ui geoip geosite vpn-routing linux docker web-server

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markdown · JSON · MCP: product_card(name="DanielLavrushin/b4")