feat: add Eduroam Analyzer service
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27
asn-updater/.gitignore
vendored
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27
asn-updater/.gitignore
vendored
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.DS_Store
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# ---> Go
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# If you prefer the allow list template instead of the deny list, see community template:
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# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
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#
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# Binaries for programs and plugins
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*.exe
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*.exe~
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*.dll
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*.so
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*.dylib
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# Test binary, built with `go test -c`
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*.test
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# Output of the go coverage tool, specifically when used with LiteIDE
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*.out
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# Dependency directories (remove the comment below to include it)
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# vendor/
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# Go workspace file
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go.work
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go.work.sum
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# env file
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.env
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19
asn-updater/Dockerfile
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asn-updater/Dockerfile
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FROM python:3.12-alpine
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RUN apk add --no-cache ca-certificates tzdata curl tar && update-ca-certificates
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WORKDIR /app
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COPY update.py /app/update.py
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COPY entrypoint.sh /app/entrypoint.sh
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COPY healthcheck.sh /app/healthcheck.sh
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RUN pip install --no-cache-dir requests==2.32.3 \
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&& chmod +x /app/entrypoint.sh /app/healthcheck.sh
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ENV OUT_DIR=/data
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VOLUME ["/data"]
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ENTRYPOINT ["/app/entrypoint.sh"]
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HEALTHCHECK --interval=5m --timeout=10s --start-period=30s --retries=3 \
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CMD /app/healthcheck.sh
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18
asn-updater/LICENSE
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18
asn-updater/LICENSE
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MIT License
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Copyright (c) 2026 mindboost
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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associated documentation files (the "Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the
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following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial
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portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
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EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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USE OR OTHER DEALINGS IN THE SOFTWARE.
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102
asn-updater/README.md
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102
asn-updater/README.md
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# education-flagger
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Forschung und Bildung sind die wichtigste Investition in die Zukunft, und der Zugang zu ihren Netzwerken verdient besondere Unterstützung.
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Dieses Repo stellt einen **minimalen Microservice** bereit, um **Hochschul- und Forschungsnetzwerke (NRENs)** anhand der **Autonomous System Number (ASN)** zu erkennen. Ziel ist es, **Zugriff oder bevorzugte Behandlung** für Nutzer aus Research- und Education-Netzen zu ermöglichen, ohne personenbezogene Daten zu verarbeiten.
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Das System dient ausschließlich der **Netzwerk-Klassifikation** und **ersetzt keine Authentifizierung**.
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## Ziel
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- Erkennen, ob eine Anfrage aus einem **Hochschul- oder Forschungsnetz** stammt
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- Bereitstellung eines **Header-Hinweises** für nachgelagerte Services
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- Grundlage für Entscheidungen wie:
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- kostenfreie Research-Features
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- angepasste UI-Hinweise
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- alternative Rate-Limits
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## Funktionsweise (Kurzfassung)
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```
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Client
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-> Traefik
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-> ForwardAuth
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-> ASN Detection Service
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-> Header wird ergänzt
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```
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1. Die Client-IP wird ermittelt
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2. Die zugehörige ASN wird lokal nachgeschlagen
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3. Die ASN wird mit einer NREN-ASN-Liste verglichen
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4. Das Ergebnis wird als HTTP-Header zurückgegeben
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## Datenquellen
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- **GeoLite2 ASN (MaxMind)**
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- kostenlos
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- lokal
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- monatliche Aktualisierung
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- **NREN-ASN-Liste**
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- abgeleitet aus PeeringDB
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- Kategorie: `Research and Education`
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- monatliche Aktualisierung
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## Bereitgestellte Header
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| Header | Beschreibung |
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|------|-------------|
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| `X-ASN` | ASN der Client-IP |
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| `X-ASN-ORG` | Organisation (optional) |
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| `X-NREN` | `1` wenn ASN zu einem Hochschul-/Forschungsnetz gehört, sonst `0` |
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## Integration
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Der Service wird als **Traefik ForwardAuth Middleware** eingebunden.
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Die Header werden über `authResponseHeaders` an die eigentliche Anwendung weitergereicht.
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Der Service ist **nicht öffentlich exponiert** und kommuniziert ausschließlich über das interne Docker-Netzwerk.
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Die dafür vorgesehenen Labels sind:
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# Middleware Definition (ForwardAuth -> asn-header)
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- "traefik.http.middlewares.asn-enrich.forwardauth.address=http://asn-header:8080/auth"
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- "traefik.http.middlewares.asn-enrich.forwardauth.trustForwardHeader=true"
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- "traefik.http.middlewares.asn-enrich.forwardauth.authResponseHeaders=X-ASN,X-ASN-ORG,X-NREN"
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# Middleware am Router aktivieren
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- "traefik.http.routers.web.middlewares=asn-enrich@docker"
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Bitte füge diese zu dem Service hinzu, bei welchem man die gewünschten Header möchte.
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## Run/Deploy (kurz)
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1. `example.env` kopieren und als `.env` befüllen (mindestens `MAXMIND_LICENSE_KEY`).
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2. Den Updater-Container starten und `OUT_DIR` als Volume mounten (z. B. `/data`).
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3. Den ASN-Detection-Service so starten, dass er **denselben** `OUT_DIR` liest.
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4. Traefik ForwardAuth aktivieren und `authResponseHeaders` durchreichen.
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5. Nach dem ersten Update sollten `GeoLite2-ASN.mmdb` und `nren_asns.txt` im `OUT_DIR` liegen.
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## example.env (kurz erklärt)
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- `MAXMIND_LICENSE_KEY`: notwendig für den GeoLite2 Download.
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- `PDB_API_KEY`: optional, reduziert PeeringDB Rate-Limits.
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- `OUT_DIR`: gemeinsamer Datenpfad zwischen Updater und Detection-Service.
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- `PDB_BASE`, `PDB_INFO_TYPE`, `PDB_LIMIT`: PeeringDB Filter.
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- `HTTP_TIMEOUT`: Timeout pro HTTP-Request.
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- `INTERVAL_SECONDS`: Update-Intervall (Standard 30 Tage).
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## Update-Strategie
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- monatliche Aktualisierung der ASN-Daten
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- keine externen Requests während der Anfrageverarbeitung
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## Einschränkungen
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- Die Erkennung ist **heuristisch**
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- Es gibt **keine Garantie**, dass jede Anfrage aus einem Hochschulnetz erkannt wird
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- Die Information darf **nicht als Authentifizierungsmerkmal** verwendet werden
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## Zusammenfassung
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Dieses Projekt ermöglicht eine **performante, datenschutzfreundliche Erkennung von Hochschulnetzen**, um **Research-Angebote kontextabhängig bereitzustellen**, ohne Nutzer zu identifizieren oder externe Dienste zur Laufzeit zu kontaktieren.
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13
asn-updater/entrypoint.sh
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13
asn-updater/entrypoint.sh
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#!/bin/sh
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set -eu
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INTERVAL_SECONDS="${INTERVAL_SECONDS:-2592000}"
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echo "[start] updater interval=${INTERVAL_SECONDS}s out_dir=${OUT_DIR:-/data}"
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while true; do
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echo "[run] update now"
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python /app/update.py
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echo "[sleep] ${INTERVAL_SECONDS}s"
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sleep "${INTERVAL_SECONDS}"
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done
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19
asn-updater/example.env
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asn-updater/example.env
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# Required
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MAXMIND_LICENSE_KEY=
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# Optional (helps with rate limits)
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PDB_API_KEY=
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# Output data location shared with the detection service
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OUT_DIR=/data
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# PeeringDB settings
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PDB_BASE=https://www.peeringdb.com
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PDB_INFO_TYPE=Educational/Research
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PDB_LIMIT=250
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# HTTP settings
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HTTP_TIMEOUT=30
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# Update interval (seconds, default 30 days)
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INTERVAL_SECONDS=2592000
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49
asn-updater/healthcheck.sh
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49
asn-updater/healthcheck.sh
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#!/bin/sh
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set -eu
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OUT_DIR="${OUT_DIR:-/data}"
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PDB_BASE="${PDB_BASE:-https://www.peeringdb.com}"
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INFO_TYPE="${PDB_INFO_TYPE:-Educational/Research}"
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if [ -z "${MAXMIND_LICENSE_KEY:-}" ]; then
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echo "[health] MAXMIND_LICENSE_KEY missing" >&2
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exit 1
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fi
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if [ ! -d "${OUT_DIR}" ]; then
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echo "[health] OUT_DIR missing: ${OUT_DIR}" >&2
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exit 1
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fi
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if [ ! -s "${OUT_DIR}/GeoLite2-ASN.mmdb" ]; then
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echo "[health] GeoLite2-ASN.mmdb missing in ${OUT_DIR}" >&2
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exit 1
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fi
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if [ ! -s "${OUT_DIR}/nren_asns.txt" ]; then
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echo "[health] nren_asns.txt missing in ${OUT_DIR}" >&2
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exit 1
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fi
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mm_url="https://download.maxmind.com/app/geoip_download?edition_id=GeoLite2-ASN&license_key=${MAXMIND_LICENSE_KEY}&suffix=tar.gz"
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mm_code="$(curl -fsS -o /dev/null -w "%{http_code}" "${mm_url}" || true)"
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if [ "${mm_code}" != "200" ]; then
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echo "[health] MaxMind download not accessible (status ${mm_code})" >&2
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exit 1
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fi
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pdb_code="000"
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pdb_url="${PDB_BASE}/api/net"
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pdb_args="--get --data-urlencode info_type=${INFO_TYPE} --data-urlencode limit=1 --data-urlencode skip=0 --data-urlencode fields=asn,status,info_type"
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if [ -n "${PDB_API_KEY:-}" ]; then
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pdb_code="$(curl -fsS -o /dev/null -w "%{http_code}" -H "Accept: application/json" -H "Authorization: Api-Key ${PDB_API_KEY}" ${pdb_args} "${pdb_url}" || true)"
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else
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pdb_code="$(curl -fsS -o /dev/null -w "%{http_code}" -H "Accept: application/json" ${pdb_args} "${pdb_url}" || true)"
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fi
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if [ "${pdb_code}" != "200" ] && [ "${pdb_code}" != "429" ]; then
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echo "[health] PeeringDB not accessible (status ${pdb_code})" >&2
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exit 1
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fi
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exit 0
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107
asn-updater/update.py
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107
asn-updater/update.py
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import os, time, json, tarfile, tempfile, shutil
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import requests
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OUT_DIR = os.getenv("OUT_DIR", "/data")
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LICENSE_KEY = os.getenv("MAXMIND_LICENSE_KEY", "").strip()
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PDB_API_KEY = os.getenv("PDB_API_KEY", "").strip()
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PDB_BASE = os.getenv("PDB_BASE", "https://www.peeringdb.com")
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INFO_TYPE = os.getenv("PDB_INFO_TYPE", "Educational/Research")
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TIMEOUT = int(os.getenv("HTTP_TIMEOUT", "30"))
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LIMIT = int(os.getenv("PDB_LIMIT", "250"))
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def atomic_replace(src_path: str, dst_path: str) -> None:
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os.makedirs(os.path.dirname(dst_path), exist_ok=True)
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tmp = dst_path + ".tmp"
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shutil.copyfile(src_path, tmp)
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os.replace(tmp, dst_path)
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def download_maxmind_mmdb() -> None:
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if not LICENSE_KEY:
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raise RuntimeError("MAXMIND_LICENSE_KEY missing")
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# Offizieller GeoLite2 Download-Mechanismus per license_key + edition_id
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url = (
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"https://download.maxmind.com/app/geoip_download"
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f"?edition_id=GeoLite2-ASN&license_key={LICENSE_KEY}&suffix=tar.gz"
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)
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with tempfile.TemporaryDirectory() as td:
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tgz = os.path.join(td, "GeoLite2-ASN.tar.gz")
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r = requests.get(url, timeout=TIMEOUT)
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r.raise_for_status()
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with open(tgz, "wb") as f:
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f.write(r.content)
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mmdb_found = None
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with tarfile.open(tgz, "r:gz") as tar:
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for member in tar.getmembers():
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if member.name.endswith("GeoLite2-ASN.mmdb"):
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tar.extract(member, path=td)
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mmdb_found = os.path.join(td, member.name)
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break
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if not mmdb_found or not os.path.exists(mmdb_found):
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raise RuntimeError("GeoLite2-ASN.mmdb not found in archive")
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atomic_replace(mmdb_found, os.path.join(OUT_DIR, "GeoLite2-ASN.mmdb"))
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def pdb_headers():
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if not PDB_API_KEY:
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return {"Accept": "application/json"}
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# PeeringDB API Key (optional)
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return {"Accept": "application/json", "Authorization": f"Api-Key {PDB_API_KEY}"}
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def fetch_pdb_page(skip: int):
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url = f"{PDB_BASE}/api/net"
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params = {
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"info_type": INFO_TYPE,
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"limit": LIMIT,
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"skip": skip,
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"fields": "asn,status,info_type",
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}
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r = requests.get(url, params=params, headers=pdb_headers(), timeout=TIMEOUT)
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r.raise_for_status()
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j = r.json()
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return j.get("data", [])
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def update_nren_asns() -> None:
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asns = set()
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skip = 0
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while True:
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data = fetch_pdb_page(skip)
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for obj in data:
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if obj.get("status") != "ok":
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continue
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asn = obj.get("asn")
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if isinstance(asn, int) and asn > 0:
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asns.add(asn)
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if len(data) < LIMIT:
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break
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skip += LIMIT
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time.sleep(1.1) # sehr konservativ
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out_txt = os.path.join(OUT_DIR, "nren_asns.txt")
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with tempfile.NamedTemporaryFile("w", delete=False) as f:
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for a in sorted(asns):
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f.write(f"{a}\n")
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tmp_path = f.name
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os.replace(tmp_path, out_txt)
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def write_meta():
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meta = {
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"updated_at_unix": int(time.time()),
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"info_type": INFO_TYPE,
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"pdb_base": PDB_BASE,
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}
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with open(os.path.join(OUT_DIR, "metadata.json"), "w") as f:
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json.dump(meta, f, indent=2)
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def main():
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os.makedirs(OUT_DIR, exist_ok=True)
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download_maxmind_mmdb()
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update_nren_asns()
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write_meta()
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print("[ok] updated mmdb + nren_asns")
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if __name__ == "__main__":
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main()
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