35 lines
No EOL
1.4 KiB
Markdown
35 lines
No EOL
1.4 KiB
Markdown
---
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title: 'eturnal'
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date: 2024-02-25T19:46:23+01:00
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weight: 1
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---
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As issues with coturn[^1] rendered it unusable most of the time, I researched
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another solution as drop-in service for STUN[^2] and TURN[^3].
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[eturnal](https://eturnal.net/) is a modern, straightforward and written in
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Erlang[^4]. Clients can connect using UDP, TCP, or TLS over IPv4 or IPv6. It
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supports the mechanism described in an IETF draft[^5] for authentication.
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{{< figure src="img/stun-turn-server.svg" alt="STUN/TURN server symbol"
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width="25%" >}}
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## Basic setup
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The [eturnal — UberLab 7 documentation](https://lab.uberspace.de/guide_eturnal/)
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is used in addition to the [official documentation](https://eturnal.net/doc/)
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to setup a basic service. Further adjustments are specified in the `eturnal.yml`
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file.
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## Logging level
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To investigate configuration errors, I can change the `log_level` setting value
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to `debug`, for example. Afterwards the eturnal service has to be restarted.
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[^1]: [Issue #844](https://github.com/Uberspace/lab/issues/844) at GitHub
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[^2]: Session Traversal Utilities for NAT
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([STUN](https://en.wikipedia.org/wiki/STUN)) in the Wikipedia
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[^3]: [Traversal Using Relays arount NAT](https://en.wikipedia.org/wiki/Traversal_Using_Relays_around_NAT)
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(TURN) in the Wikipedia
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[^4]: [Erlang](https://erlang.org/)/OTP website
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[^5]: [REST API for Access to TURN Services](https://datatracker.ietf.org/doc/html/draft-uberti-behave-turn-rest-00)
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specification as IETF draft |