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Add initial doc to work with a self-signed cert (#1150)
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source/_cookbook/tls_self_signed_certificate.markdown
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source/_cookbook/tls_self_signed_certificate.markdown
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---
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layout: page
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title: "Self-signed certificate for SSL/TLS"
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description: "Configure a self-signed certificate to use with Home Assistant"
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date: 2016-10-06 08:00
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sidebar: true
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comments: false
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sharing: true
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footer: true
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ha_category: Infrastructure
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---
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If your Home Assistant instance is only accessible from your local network you can still protect the communication between your browsers and the frontend with SSL/TLS. [Let's encrypt](blog/2015/12/13/setup-encryption-using-lets-encrypt/) will only work if you have a DNS entry and remote access is allowed. The solution is to use a self-signed certificate. As you most likely don't have a certification authority (CA) your browser will conplain about the security. If you have a CA then this will not be an issue.
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To create locally a certificate you need the [OpenSSL](https://www.openssl.org/) command-line tool.
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Change to your Home Assistant [configuration directory](/getting-started/configuration/) like `~/.homeassistant`. This will make it easier to backup your certificate and the key. Run the command shown below.
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```bash
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$ openssl req -new -x509 -sha256 -newkey rsa:4096 -nodes -keyout privkey.pem -days 730 -out fullchain.pem
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```
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For details about the parameters, please check the OpenSSL documentation. Provide the requested information during the generation process. At the end you will have two files called `privkey.pem` and `fullchain.pem`. The key and the certificate.
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Update the `http:` entry in your `configuration.yaml` file and let it point to your created files.
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```yaml
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http:
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api_password: YOUR_SECRET_PASSWORD
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ssl_certificate: /home/fab/.homeassistant/fullchain.pem
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ssl_key: /home/fab/.homeassistant/privkey.pem
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```
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A tutorial "[Working with SSL Certificates, Private Keys and CSRs](https://www.digitalocean.com/community/tutorials/openssl-essentials-working-with-ssl-certificates-private-keys-and-csrs)" could give you some insight about special cases.
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