Ping-sweep your subnets to discover every responding host. MyNet cross-references results against your inventory to show you what is known, what is unknown, and what has disappeared.
The network scanner performs a ping sweep of all subnets with a defined CIDR in your network list. For each IP that responds:
- MyNet sends an ICMP ping
- It attempts a reverse DNS lookup for the IP
- It looks up the MAC address from the system ARP table (Linux:
ip neigh showor/proc/net/arp) - It cross-references the IP and MAC against all devices in your inventory
Results are returned in real time but not saved to the database — scanning is purely observational.
Navigate to Settings → Network Scan (/settings/network-scan).
Requires Admin role.
Click Scan All Networks to sweep every network in your MyNet inventory that has a CIDR defined.
Use the network selector to choose one or more specific networks to scan.
Scan time depends on the number of IPs in your subnets and how many respond. A /24 subnet (254 hosts) typically completes in 10–30 seconds. Larger subnets take proportionally longer.
Results are grouped into two categories:
Hosts whose IP or MAC address matches a device already in your MyNet inventory.
| Column | Description |
|---|---|
| IP | The responding IP address |
| MAC | Hardware address (from ARP) |
| Hostname | Reverse DNS name (if resolved) |
| Device | The matched MyNet device name |
| Status | Whether the IP/MAC match is exact |
Hosts that responded to a ping but are not in your inventory.
| Column | Description |
|---|---|
| IP | The responding IP address |
| MAC | Hardware address (from ARP, if available) |
| Hostname | Reverse DNS name (if resolved) |
| Action | Add to MyNet button |
For each unknown host, click Add to MyNet to open the Device Form pre-filled with:
- IP address
- MAC address (if available from ARP)
- Hostname (from reverse DNS, if available)
- Network assignment (from which subnet the IP was found in)
Review and complete the form, then save to add it to your inventory.
| Limitation | Detail |
|---|---|
| Read-only | The scanner never modifies your database — it only reports what it finds |
| ICMP required | Devices that block ICMP ping will not appear in results even if they are online |
| ARP table | MAC lookup relies on the server's ARP cache. Devices on different subnets (not directly connected) may not have an ARP entry, so MAC addresses may not be available for all results |
| Large subnets | Scanning a /16 or larger subnet takes a long time and is generally impractical. Use targeted scans on specific /24 or smaller subnets |
| Raspberry Pi | On a Pi 3B+, scanning a full /24 takes about 15–25 seconds with default concurrency settings |