internal/Internal-Services.md
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There is a search engine at [search.dn42](https://search.dn42) that can also be used to discover services and content. It attempts to index all sites on DN42.
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+## Matrix Server
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+There is a matrix server at [buzzster.dn42](https://buzzster.dn42) which can be used from the Element application for Android and iOS and soon from the web.
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## Certificate Authority
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xuu is maintaining an [certificate authority](/services/Certificate-Authority) for internal services.