Default feeds page added

_pages/default-feeds.md

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+---
+layout: page
+title: MISP Default Feeds
+permalink: /feeds/
+toc: true
+---
+
+MISP includes a set of public OSINT feeds in its default configuration. The feeds can
+be used as a source of correlation for all your events and attributes without the need to
+import the feed into your system. The MISP feed system allows a fast correlation but also
+a quick comparison of the feeds among the others.
+
+The feeds can be in three different formats:
+
+- [MISP standardized format](https://github.com/MISP/misp-rfc/blob/master/misp-core-format/raw.md.txt) which is the preferred format to benefit from all the MISP functionalities.
+- CSV format where you can select the values you want to be imported.
+- freetext format which allows to use the automatic indicators/attributes detection from unstructured texts.
+
+and located in different input transports:
+
+- Network (URL)
+- Local (file)
+
+## Default feeds available in MISP
+
+The default feeds are described in a [simple JSON format](https://github.com/MISP/MISP/blob/2.4/app/files/feed-metadata/defaults.json). The default feeds, the current version of MISP, are the following:
+
+{% include feeds.md %}
+
+To enable a feed in the caching, you just need to check the enabled field and the lookup visible to benefit automatically of the feeds in your local MISP instance.
+
+## Feed overlap analysis matrix
+
+![feed overlap analysis matrix](/assets/images/misp/blog/feed-overlap-analys-matrix.png){:class="img-responsive"}
+
+## How to have my feed published in the default MISP OSINT feed
+
+- Fork the [MISP project](https://github.com/MISP/MISP) on GitHub.
+- Update the [default MISP feed](https://github.com/MISP/MISP/blob/2.4/app/files/feed-metadata/defaults.json) to add your feed(s).
+- Make a pull-request with the updated JSON file.
+