Pi.Alert
Pi.Alert keeps an eye on your Wi-Fi and LAN and lets you know when something
changes. It discovers devices on your network, tracks their availability, and
provides a web interface for managing everything in one place.
What Pi.Alert can do
- Discover devices connected to your Wi-Fi or LAN.
- Notify you when an unknown device appears or a known device goes offline.
- Monitor devices outside the local subnet using ICMP.
- Detect unwanted or foreign DHCP servers.
- Monitor internal and external web services by checking HTTP status, response
time, and SSL certificate information.
- Alert you when a monitored service becomes unavailable or its status or
certificate changes.
- Run manual Nmap scans and send Wake-on-LAN commands.
- Show how devices are connected through routers, switches, and other network
infrastructure.
Need visibility into another network segment? The companion
Pi.Alert-Satellite project
can scan independently and send its results to an existing Pi.Alert instance.
See how this version compares with the original project.
Scan methods and imports
Pi.Alert can collect device information from several sources:
- arp-scan for local network discovery
- Pi-hole 5 and 6 for DNS and DHCP data
- FRITZ!Box for active hosts
- MikroTik for DHCP leases
- UniFi for client devices
- OpenWrt and AsusWRT for active hosts
- pfSense and OPNsense for active hosts, DHCP leases, and ARP tables
- AdGuard Home for DHCP leases and hosts detected through recent DNS queries
- Pi.Alert-Satellite using arp-scan, Pi-hole 6, MikroTik, UniFi, OpenWrt,
AsusWRT, pfSense, OPNsense, or AdGuard Home
How it works
Backend
The backend is normally started by the operating system's cron service every
five minutes. It runs the configured scans and imports, stores their results,
and sends notifications when relevant changes are detected. It also monitors
manually configured hosts and web services.
Notifications can be delivered through the frontend, email
(setup guide),
Pushsafer, Pushover,
ntfy, or Telegram through the Telegram Bot API. Shoutrrr remains available as
an optional discovery helper (setup guide).
Web interface
The web interface gives you a central place to:
- review current and historical device information;
- add owners, locations, groups, notes, and other device metadata;
- organize network relationships;
- configure the frontend and edit backend settings;
- view events, reports, journals, and scan results;
- use the API with integrations such as
Home Assistant or
Homepage.
The interface is available in English, German, Spanish, French, Italian,
Polish, Danish, Dutch, Czech, Finnish, Swedish, Norwegian, Lithuanian,
Ukrainian, and Russian. Login protection is enabled during installation with a
randomly generated password. You can change it later with
pialert-cli.
Skin-specific favicons and home-screen icons are included.
They can also be linked directly from this repository when iOS refuses to load
icons from an HTTP or self-signed HTTPS installation.
Installation
Pi.Alert was originally designed for the Raspberry Pi and targets Debian-based
systems using apt. Before installing it on DietPi, Ubuntu Server, or another
Debian-based distribution, check the
distribution notes.
Run the installer as root:
sudo bash -c "$(wget -qLO - https://github.com/leiweibau/Pi.Alert/raw/main/install/pialert_install.sh)"
Once installation is complete, continue with the
first-start guide.
Proxmox LXC
For an LXC installation, take a look at the
Proxmox VE Helper-Scripts,
originally provided by the now archived
tteck/Proxmox repository. This installation
method uses the Pi.Alert version from this repository after the container has
been created and provides its own update command.
Updating
The Update Check entry in the sidebar shows available Pi.Alert releases,
their changes, and the status of the GeoLite2 database.
To update an existing installation, run:
sudo bash -c "$(wget -qLO - https://github.com/leiweibau/Pi.Alert/raw/main/install/pialert_update.sh)"
If your installation still uses the previous home-directory layout, follow the
migration guide.
Older releases and their release notes are available from the
Pi.Alert release archive.
Documentation
- NetAlertX began as a Pi.Alert fork
and is now an independent, Docker-based project.
- pucherot/Pi.Alert is the original,
currently unmaintained project.
Support and thanks
If Pi.Alert is useful to you and you would like to support its development:
| GitHub Sponsors |
Buy Me a Coffee |
 |
 |
Thank you to everyone who sponsors, contributes to, tests, translates, or
otherwise supports the project.
License
Pi.Alert is released under the GNU General Public License 3.0.
Questions and feedback are welcome at [email protected].
Credits
Pi.Alert also uses or has benefited from the following projects and services:
Pi.Alert 监控你的 Wi-Fi 或局域网，在未知设备接入、已知设备断开或受监控的网站服务宕机时向你告警。它还会为你配置的网站服务检查 HTTP 状态、响应时间和 SSL 证书。