Configuring Your NAS to Email Daily Bandwidth Usage Reports

A daily bandwidth email can turn vague network complaints into useful evidence. Instead of guessing why video calls stutter or a monthly data allowance disappears, you can review how much traffic your NAS handled, which services generated it, and whether usage rose at a predictable time. Synology and QNAP systems can support this workflow through built-in notifications, monitoring packages, logs, and scheduled scripts, although the exact method depends on the model and operating system version.

The most important distinction is between NAS traffic and total household bandwidth. A NAS can measure transfers to and from its own shares, backup jobs, media services, cloud synchronisation and remote-access applications. It usually cannot see every device on the network unless the NAS also receives router statistics or runs in a position where all traffic passes through it. A reliable report therefore starts with a clear definition of what is being measured.

Decide What Your Report Should Measure

Begin by identifying the traffic categories that matter. For a home user, this may include uploads to a cloud backup provider, downloads to a media library, remote access through Synology Drive or Qsync, and large computer backups. A small business may need separate figures for staff file access, virtual machines, off-site replication and surveillance-camera uploads. Recording the interface, destination and transfer direction prevents a daily report from becoming a single unhelpful total.

If you need whole-network bandwidth usage, check whether your router, firewall or mesh system provides an API, SNMP data, traffic analyser or emailed statistics. Many Australian households use an NBN connection with a separate modem-router, while business networks may use UniFi, MikroTik, Sophos, pfSense or a managed firewall. In these arrangements, the gateway is normally the authoritative source for internet consumption, while the NAS is better suited to reporting storage-related traffic.

Also decide whether the report should show megabytes, gigabytes or a percentage of an allowance. Most Australian fixed-line plans no longer impose strict monthly data caps, but some mobile broadband, satellite and backup connections still do. A daily report that compares activity with a monthly threshold can expose a rapidly growing off-site backup before it creates a billing surprise.

Use Built-In Monitoring and Notification Tools

Synology DSM includes resource monitoring, notification settings and package-specific logs. Depending on the model and DSM release, administrators may use Resource Monitor, Active Insight, Hyper Backup logs, Cloud Sync reports or Download Station statistics. Set the system to send email notifications through Control Panel settings, then create a daily summary where the relevant package supports scheduled reporting. For a NAS that does not offer a ready-made bandwidth digest, scheduled tasks can collect interface counters and email the result.

QNAP QTS and QuTS hero provide comparable options through Resource Monitor, Notification Center, Network & Virtual Switch and applications such as Hybrid Backup Sync. HBS can log transfer totals for replication and cloud jobs, while Network & Virtual Switch may expose interface activity. Some features vary by hardware and firmware, so check the administration interface rather than assuming that a feature documented for a higher-end model exists on an entry-level unit.

For advanced reporting, install a monitoring platform such as Grafana with Prometheus, Telegraf or an SNMP collector on a separate server or container. Poll the NAS interface counters at regular intervals, store the values, and schedule a daily email containing the previous 24-hour total. This produces historical graphs and avoids relying on a single counter that resets after a reboot. Keep monitoring services isolated from the public internet and update them along with the NAS.

Configure SMTP Without Exposing Credentials

Email delivery requires an SMTP server, a sender address, a recipient address and a secure authentication method. A business domain may use Microsoft 365 or Google Workspace, while a home user might use an ISP mailbox or a dedicated mail provider. Enter the provider’s authenticated SMTP hostname, port and encryption setting exactly as documented. Port 587 with STARTTLS is common; some providers use port 465 with implicit TLS.

Avoid placing a primary email password directly into a script or sharing it among administrators. Use an app password where the provider supports one, or create a dedicated mailbox restricted to sending monitoring messages. Multi-factor authentication should remain enabled on the main account. If the NAS stores the credential, restrict administrator access, protect configuration backups, and avoid including the password in task output or command-line history.

Send test messages before enabling a daily schedule. Check delivery to an external mailbox, verify the report’s date and timezone, and confirm that the message does not land in junk mail. Australian daylight saving can affect schedules in New South Wales, Victoria, Tasmania, South Australia and the Australian Capital Territory, while Queensland, Western Australia and the Northern Territory do not observe it. Set the NAS location correctly so “7:00 am daily” remains meaningful.

Build a Useful Daily Report

A practical report should be short enough to scan on a phone. Include the reporting period, NAS hostname, uptime, total received and transmitted bytes, top transfer source or destination where available, and the status of scheduled backup tasks. Add storage capacity and system temperature only if they help diagnose bandwidth-related problems. A report that contains every warning and process log will bury the information that matters.

Interpret the numbers carefully. A media server streaming to a television on the same local network may consume NAS interface traffic without using the internet connection. Conversely, a router may count encrypted remote-access traffic as ordinary internet usage without showing which NAS folder generated it. If the NAS has multiple Ethernet ports, bonded interfaces or virtual machines, collect counters from each interface and explain whether the report shows a combined total.

Schedule the report after the busiest routine has finished. A 6:00 am message may be useful for a home, whereas a business might prefer a report after overnight replication and before staff arrive. Compare daily totals with a weekly baseline, particularly after installing a new surveillance system, changing cloud-sync rules or adding a Plex library. Sudden increases often come from a failed sync loop, repeated backup retries, thumbnail generation, torrents or an exposed service.

When preserving logs or reports for longer-term analysis, use a separate backup destination. A USB backup guide explains one practical way to add removable storage to a NAS backup strategy. Keep in mind that an attached USB drive is not a complete disaster-recovery plan if it remains connected during ransomware or electrical damage; rotate it or copy critical reports elsewhere.

Protect Privacy and Make Alerts Actionable

Bandwidth reports can contain sensitive information. Destination hostnames may reveal cloud providers, business partners, medical services or personal interests, and traffic patterns can indicate when a property is occupied. Under Australia’s Privacy Act 1988, organisations covered by the legislation should handle personal information responsibly, limit access and retain it only as long as needed. The Notifiable Data Breaches scheme also makes strong account security and incident preparation important when monitoring data is compromised.

Keep the NAS behind the router firewall and disable unnecessary port forwarding. If remote access is required, prefer a VPN or a well-maintained vendor relay service over exposing administration panels, SSH or file-sharing ports directly to the internet. Use separate administrator and user accounts, enable multi-factor authentication where available, and review login alerts alongside bandwidth alerts. QNAP and Synology devices should receive firmware and security updates promptly, with unsupported models isolated or replaced.

Make thresholds specific rather than noisy. For example, trigger an immediate alert if outbound traffic exceeds a chosen amount, if a backup job retries repeatedly, or if a new destination appears. A daily summary can then remain calm and readable. If reports are part of a broader digital archive, an archived web reference can be useful when comparing older online material with current NAS-based preservation workflows, but store external content according to its ownership and privacy requirements.

For an Australian household or small office, a sensible implementation is:

• Confirm whether the report covers NAS traffic, whole-network traffic, or both.
• Set the correct Australian time zone and account for daylight-saving changes.
• Configure authenticated SMTP with a dedicated sender account and encrypted transport.
• Include upload, download, backup status and the reporting period in every message.
• Retain daily reports on a separate device and rotate offline copies for important records.
• Set thresholds for unusual outbound transfers, failed jobs and repeated synchronisation.
• Review firmware, exposed services, user permissions and multi-factor authentication regularly.

Start with one daily email for a week and compare it with the router’s traffic graph, cloud-provider usage and NAS job logs. Adjust the schedule and categories until the numbers explain real activity rather than generating background noise. Once the report is dependable, use it as an early-warning control for runaway backups, compromised accounts and network changes, while continuing to maintain tested backups and a secure recovery plan.