Ntopng
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You can find the Ntopng Settings at **Services → Ntopng**.

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    :alt: Ntopng

**Ntopng** is a network traffic probe that monitors network usage.

Before you can use the Ntopng it has to be installed. You can install it at **System → Addons**.

Settings
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.. image:: img/Services-Ntopng1.png
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    :alt: Ntopng

On the page the Ntopng can be enabled or disabled.

**Enable Login** enables *Username* and *Password*.

**Username** is *admin* and cannot be changed.

**Password** for the ntopng GUI.

**Interfaces** can be specified and determine where the network traffic is collected. Data are only collected in Ntopng for enabled intefaces.

**DNS Mode** is the DNS address resolution mode and can be one of the following:

* Decode DNS responses and resolve local numeric IPs only
* Decode DNS responses and resolve all numeric IPs
* Decode DNS responses and don't resolve numeric IPs
* Don't decode DNS responses and don't resolve numeric IPs

**Clear historical data** will remove all recorded data so far.

**Dump Flows** save flows to a backend system. The avaliable options are MySQL, ElasticSearch, Logstash