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Update dns-over-tls.md (cloudflare#805)
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abracchi-tw authored Feb 19, 2021
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Expand Up @@ -37,7 +37,7 @@ Each Gateway location has a unique DoT hostname. Locations and corresponding DoT

### Configure your DoT client

Depending on your operating system, you can choose from a variety of standalone DoT clients. Alternatively, stub resolvers (e.g. BIND) support DoT natively.
Depending on your operating system, you can choose from a variety of standalone DoT clients.

To configure your DoT client, use the following IP address and hostname:

Expand All @@ -46,6 +46,26 @@ Hostname: DoT hostname for a chosen location (above this is 9y65g5srsm.cloudflar
IP address: 162.159.36.5
```

Alternatively, stub resolvers (e.g., Unbound) support DoT natively.

```text
# Unbound TLS Config
tls-cert-bundle: "/etc/ssl/cert.pem"
# Forwarding Config
forward-zone:
name: "."
forward-tls-upstream: yes
forward-addr: 172.64.36.1@853#xxxxxxxxx.cloudflare-gateway.com
forward-addr: 172.64.36.2@853#xxxxxxxxx.cloudflare-gateway.com
forward-addr: 2a06:98c1:54::xxxx#xxxxxxxxx.cloudflare-gateway.com
```

<Aside>

Each location has a unique DoT hostname and IPv6 address. Remember to enter your location's values when applying the config above.

</Aside>

## Supported TLS versions

Cloudflare's DNS over TLS supports TLS 1.3 and TLS 1.2.

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