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---
title: "PowerDNS"
date: 2019-03-03T16:39:46+01:00
draft: false
slug: pdns
---
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Since: v0.4.0
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Configuration for [PowerDNS ](https://www.powerdns.com/ ).
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- Code: `pdns`
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Here is an example bash command using the PowerDNS provider:
```bash
PDNS_API_URL=http://pdns-server:80/ \
PDNS_API_KEY=xxxx \
lego --email myemail@example.com --dns pdns --domains my.example.org run
```
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## Credentials
| Environment Variable Name | Description |
|-----------------------|-------------|
| `PDNS_API_KEY` | API key |
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| `PDNS_API_URL` | API URL |
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The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
More information [here ](/lego/dns/#configuration-and-credentials ).
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## Additional Configuration
| Environment Variable Name | Description |
|--------------------------------|-------------|
| `PDNS_HTTP_TIMEOUT` | API request timeout |
| `PDNS_POLLING_INTERVAL` | Time between DNS propagation check |
| `PDNS_PROPAGATION_TIMEOUT` | Maximum waiting time for DNS propagation |
| `PDNS_TTL` | The TTL of the TXT record used for the DNS challenge |
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The environment variable names can be suffixed by `_FILE` to reference a file instead of a value.
More information [here ](/lego/dns/#configuration-and-credentials ).
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## Information
Tested and confirmed to work with PowerDNS authoritative server 3.4.8 and 4.0.1. Refer to [PowerDNS documentation ](https://doc.powerdns.com/md/httpapi/README/ ) instructions on how to enable the built-in API interface.
PowerDNS Notes:
- PowerDNS API does not currently support SSL, therefore you should take care to ensure that traffic between lego and the PowerDNS API is over a trusted network, VPN etc.
- In order to have the SOA serial automatically increment each time the `_acme-challenge` record is added/modified via the API, set `SOA-EDIT-API` to `INCEPTION-INCREMENT` for the zone in the `domainmetadata` table
## More information
- [API documentation ](https://doc.powerdns.com/md/httpapi/README/ )
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