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https://github.com/skoelle/dyndns-updater.git
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notify feature
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@@ -21,6 +21,14 @@ POLL_INTERVAL_MINUTES=15
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# Healthchecks (self-hosted)
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HEALTHCHECK_PING_URL=https://healthchecks.example.org/ping/change-me
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# E-Mail-Notification bei IP-Änderung (optional)
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SMTP_HOST=smtp.example.org
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SMTP_PORT=587
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SMTP_USER=change-me
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SMTP_PASSWORD=change-me
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NOTIFY_EMAIL_TO=you@example.org
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NOTIFY_EMAIL_FROM=dyndns@example.org
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# Sonstiges
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TZ=Europe/Berlin
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LOG_LEVEL=INFO
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@@ -13,6 +13,7 @@
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## Phase 2 - Kernmodule
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- [x] config.py, state.py, fritzbox.py, cloudflare.py, freedns.py, healthcheck.py, main.py
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- [x] notify.py (E-Mail-Notification bei IP-Aenderung)
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## Phase 3 - Lokaler Test
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- [ ] .env lokal befuellen (nicht committen)
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@@ -39,6 +39,20 @@ Optional: `FREEDNS_UPDATE_URL`, `POLL_INTERVAL_MINUTES`,
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`HEALTHCHECK_PING_URL`, `TZ`, `LOG_LEVEL`. Die IP kommt ausschließlich aus der
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FritzBox, nie aus Webhook-Parametern.
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### E-Mail-Notification (optional)
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Bei IP-Änderung wird eine HTML-E-Mail mit Emojis versendet, wenn SMTP-Konfiguration
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vorliegt:
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| Variable | Zweck |
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| --- | --- |
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| `SMTP_HOST` | SMTP-Server (z.B. `smtp.gmail.com`) |
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| `SMTP_PORT` | Port (Default: `587`) |
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| `SMTP_USER` | SMTP-Login |
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| `SMTP_PASSWORD` | SMTP-Passwort |
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| `NOTIFY_EMAIL_TO` | Empfänger-Adresse |
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| `NOTIFY_EMAIL_FROM` | Absender-Adresse |
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## Betrieb
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- **State (bewusst ohne Volume, ephemeral):** zuletzt bekannte IP liegt als
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@@ -26,7 +26,8 @@ die IP bei jedem Trigger selbst ueber die FritzBox TR-064-Schnittstelle.
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2. IP_letzte = state.load()
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3. Wenn gleich: Poll -> nur Heartbeat-Ping, kein Update. Webhook/Start -> nur Log.
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4. Wenn unterschiedlich: Cloudflare-Records updaten, FreeDNS aufrufen, state speichern,
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Healthcheck-Erfolgs-Ping. Bei Teilfehler: state NICHT speichern, Fail-Ping.
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Healthcheck-Erfolgs-Ping, E-Mail-Notification (optional). Bei Teilfehler: state NICHT
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speichern, Fail-Ping.
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## 3. Cloudflare
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@@ -46,7 +47,14 @@ die IP bei jedem Trigger selbst ueber die FritzBox TR-064-Schnittstelle.
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- FritzBox-TR-064-User mit eingeschraenkten Rechten
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- Alle Records bleiben DNS-only (kein Proxy-Mode in v1)
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## 6. Offene Punkte
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## 6. E-Mail-Notification (optional)
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- HTML-E-Mail mit Emojis bei erfolgreicher IP-Aenderung
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- SMTP-Auth mit TLS (Port 587)
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- Nur wenn SMTP_HOST, NOTIFY_EMAIL_TO und NOTIFY_EMAIL_FROM gesetzt
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- Plain-Text-Fallback fuer Clients ohne HTML-Unterstuetzung
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## 7. Offene Punkte
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- IPv6/AAAA
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- Proxy-Mode fuer reine HTTP(S)-Subdomains
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@@ -39,8 +39,19 @@ class Config:
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self.healthcheck_ping_url = os.environ.get("HEALTHCHECK_PING_URL", "")
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self.smtp_host = os.environ.get("SMTP_HOST", "")
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self.smtp_port = int(os.environ.get("SMTP_PORT", "587"))
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self.smtp_user = os.environ.get("SMTP_USER", "")
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self.smtp_password = os.environ.get("SMTP_PASSWORD", "")
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self.notify_email_to = os.environ.get("NOTIFY_EMAIL_TO", "")
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self.notify_email_from = os.environ.get("NOTIFY_EMAIL_FROM", "")
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self.state_path = os.environ.get("STATE_PATH", "/app/data/last-known-ip.json")
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@property
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def email_notification_enabled(self) -> bool:
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return bool(self.smtp_host and self.notify_email_to and self.notify_email_from)
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def validate(self):
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missing = [v for v in REQUIRED_VARS if not os.environ.get(v)]
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if missing:
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+2
-1
@@ -7,7 +7,7 @@ import threading
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from apscheduler.schedulers.background import BackgroundScheduler
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from flask import Flask
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from app import cloudflare, freedns, healthcheck, state
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from app import cloudflare, freedns, healthcheck, notify, state
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from app.config import config
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from app.fritzbox import FritzBoxError, get_external_ip
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@@ -67,6 +67,7 @@ def run_cycle(trigger: str = "unknown"):
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status="success",
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message=f"IP updated to {current_ip}",
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)
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notify.send_ip_changed_email(last_ip, current_ip)
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else:
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failed = {k: v for k, v in cf_results.items() if v != "ok"}
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log.error(
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@@ -0,0 +1,77 @@
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# Copyright (c) 2026 Stefan Koelle (https://stefankoelle.de)
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# Licensed under the MIT License. See LICENSE file in project root for details.
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import logging
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import smtplib
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from email.message import EmailMessage
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from app.config import config
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log = logging.getLogger("notify")
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def send_ip_changed_email(old_ip: str | None, new_ip: str) -> bool:
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if not config.email_notification_enabled:
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log.debug("E-Mail-Notification nicht konfiguriert, überspringe.")
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return False
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if old_ip is None:
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old_ip = "unbekannt"
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subject = f"🌐 IP-Update: {old_ip} → {new_ip}"
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html = f"""\
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<html>
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<body style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
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background: #0f172a; color: #e2e8f0; padding: 32px; margin: 0;">
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<div style="max-width: 480px; margin: 0 auto;">
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<div style="text-align: center; font-size: 48px; margin-bottom: 16px;">🔄</div>
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<h1 style="font-size: 20px; color: #38bdf8; text-align: center; margin-bottom: 24px;">
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IP-Adresse geändert
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</h1>
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<div style="background: #1e293b; border-radius: 12px; padding: 24px; margin-bottom: 24px;">
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<table style="width: 100%; border-collapse: collapse;">
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<tr>
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<td style="padding: 8px 0; color: #94a3b8; font-size: 14px;">📍 Alte IP</td>
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<td style="padding: 8px 0; text-align: right; font-family: monospace; font-size: 16px; color: #f87171;">
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{old_ip}
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</td>
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</tr>
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<tr>
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<td colspan="2" style="padding: 4px 0; text-align: center; font-size: 20px;">⬇️</td>
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</tr>
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<tr>
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<td style="padding: 8px 0; color: #94a3b8; font-size: 14px;">🆕 Neue IP</td>
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<td style="padding: 8px 0; text-align: right; font-family: monospace; font-size: 16px; color: #4ade80;">
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{new_ip}
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</td>
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</tr>
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</table>
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</div>
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<p style="font-size: 13px; color: #64748b; text-align: center; margin: 0;">
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📡 DynDNS-Updater · Cloudflare + FreeDNS aktualisiert
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</p>
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</div>
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</body>
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</html>"""
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text = f"IP-Adresse geändert: {old_ip} → {new_ip}"
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msg = EmailMessage()
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msg["Subject"] = subject
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msg["From"] = config.notify_email_from
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msg["To"] = config.notify_email_to
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msg.set_content(text)
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msg.add_alternative(html, subtype="html")
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try:
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with smtplib.SMTP(config.smtp_host, config.smtp_port) as server:
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server.ehlo()
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server.starttls()
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server.ehlo()
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server.login(config.smtp_user, config.smtp_password)
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server.send_message(msg)
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log.info("E-Mail gesendet: %s -> %s", subject, config.notify_email_to)
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return True
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except Exception as exc:
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log.error("E-Mail-Versand fehlgeschlagen: %s", exc)
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return False
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