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29 lines
1.9 KiB
Markdown
Executable File
29 lines
1.9 KiB
Markdown
Executable File
## Overview
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**NMAP-scan** is a command-line tool used to discover and fingerprint IP hosts on your network.
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The NMAP-scan (and other Network-scan plugins using the `SCAN_SUBNETS` setting) runtime depends on the number of IP addresses to check — so configure it carefully with the appropriate **network mask** and **interface**.
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Refer to the [subnets documentation](https://docs.netalertx.com/SUBNETS) for help with setting up VLANs, understanding which VLANs are supported, and determining your network mask and interface.
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> [!NOTE]
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> The `NMAPDEV` plugin is excellent for detecting device availability, but **ARP-scan** is better for scanning across multiple VLANs and subnets.
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> NMAP cannot retrieve MAC addresses from other subnets (an NMAP limitation), which are often required to identify devices.
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> You can safely combine different scan methods.
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> See all available network scanning options (marked with `🔍 dev scanner`) in the [Plugins overview](https://docs.netalertx.com/PLUGINS).
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This plugin is **not optimized for name resolution** (use `NSLOOKUP` or `AVAHISCAN` instead), but if a name is available it will appear in the **Resolved Name** column.
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---
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### Usage
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1. In **Settings**, configure the `SCAN_SUBNETS` value as described in the [subnets documentation](https://docs.netalertx.com/SUBNETS).
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The plugin automatically **strips unsupported `--vlan` parameters** and replaces `--interface` with `-e`.
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2. Enable the plugin by setting the `RUN` parameter from `disabled` to your preferred run mode (usually `schedule`).
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3. Specify the schedule using the `NMAPDEV_RUN_SCHD` setting.
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4. Adjust the scan timeout if necessary with the `NMAPDEV_RUN_TIMEOUT` setting.
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5. If scanning **remote networks**, consider enabling the `NMAPDEV_FAKE_MAC` setting — review its description carefully before use.
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6. Review all remaining settings.
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7. Click **SAVE**.
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8. Wait for the next scheduled scan to complete.
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