# DanielLavrushin/b4

Network packet processor with a friendly UI for circumventing Deep Packet Inspection (DPI) systems.

Repository: https://github.com/DanielLavrushin/b4
Canonical: https://ross.abutalabs.com/products/b4
Homepage: https://docs.b4core.app/
Language: Go
License: GPL-3.0
License Family: copyleft
Topics: asuswrt, asuswrt-merlin, censorship, censorship-free, dpi, geosite, openwrt, unblock, xray, xray-core, youtube
Last push: 2026-08-26T20:05:03+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 27
- inputs: {"age_days": 391, "days_push": 7, "days_rel": 11, "gap_med": 1.0, "n_releases_24m": 117}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1714, forks 70 (observed 2026-08-28T04:05:26.172625+00:00)

## What it is
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
- artifact type: service
- maturity: active
- function: security, privacy, networking, proxy, self-hosted
- domain: censorship-circumvention, privacy, networking, security, self-hosted
- platform: self-hosted
- tags: dpi-bypass, packet-fragmentation, xray, openwrt, asuswrt-merlin, router, web-ui, geoip, geosite, vpn-routing, linux, docker, web-server

## Member repositories
- DanielLavrushin/b4 (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:26.172625+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:34:37.407104+00:00, confidence not recorded.
  - readme: https://github.com/DanielLavrushin/b4 (fetched 2026-08-28T04:05:26.172625+00:00, sha 79ffe142765e)
  - homepage: https://docs.b4core.app/ (fetched 2026-08-29T11:10:34.189109+00:00, sha 8e34b8cfe6dc)
  - site_page: https://docs.b4core.app/docs/intro (fetched 2026-08-29T11:10:34.191800+00:00, sha 40187df6d105)
  - site_page: https://docs.b4core.app/docs/changelog (fetched 2026-08-29T11:10:34.193995+00:00, sha 800d99173a12)
  - site_page: https://docs.b4core.app/docs/install (fetched 2026-08-29T11:10:34.200552+00:00, sha 0ba79a031a39)
  - site_page: https://docs.b4core.app/docs/quickstart (fetched 2026-08-29T11:10:34.202208+00:00, sha 82c0ff3983f4)
  - site_page: https://docs.b4core.app/docs/sets (fetched 2026-08-29T11:10:34.203807+00:00, sha 9c5734f8719e)
- Data as of 2026-08-30T08:39:29.467469+00:00.