> For the complete documentation index, see [llms.txt](https://docs.islandrouter.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.islandrouter.com/island-router-cli-2.3.2/commands/ip-interface-context/ip-ident4.md).

# ip ident4

## Syntax

```
[no] ip ident4 off|on
```

## Syntax Description

<table><thead><tr><th width="203">Keyword</th><th>Description</th></tr></thead><tbody><tr><td><code>no</code></td><td>(Optional) This is the same as <code>ip ident4 off.</code></td></tr><tr><td><code>off</code></td><td>Disables fingerprinting of IPv4 devices on the interface.</td></tr><tr><td><code>on</code></td><td>Enables fingerprinting of IPv4 devices on the interface.</td></tr></tbody></table>

## Defaults

Devices fingerprinting is enabled on LAN interfaces and disabled on WAN interfaces by default.

## Usage Guidelines

This command enables or disables "fingerprinting" of IPv4 devices on an interface. Fingerprinting uses protocols such as SSDP and mDNS to gather information about devices on the network to aid in the identification of new and unknown devices.

This command is valid only in interface context. Entering it will set the [interface mode](/island-router-cli-2.3.2/commands/ip-interface-context/ip-autoconfig.md) to `manual`.

## Examples

```
ip ident4 off
```

## Related Commands

{% content-ref url="/pages/JK6QY8Ad2gffsaGWZyNw" %}
[interface](/island-router-cli-2.3.2/commands/interface.md)
{% endcontent-ref %}

{% content-ref url="/pages/rnlF4fIWU4E9KK8oNKL5" %}
[ip ident6](/island-router-cli-2.3.2/commands/ip-interface-context/ip-ident6.md)
{% endcontent-ref %}


---

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