49 lines
2.4 KiB
Markdown
49 lines
2.4 KiB
Markdown
# FritzBox OVH DynDNS (DynHost) Setup
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This document describes how to configure your FritzBox to automatically update an OVH DynHost record.
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Since you have already set up `dyndns.moritzgraf.de` as a DynHost in your OVH control panel, the remaining step is to configure the FritzBox to push IP updates to OVH.
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## OVH DynHost Settings (Reference)
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The credentials for the DynHost are securely stored in the encrypted `dyndns_ovh.secret.yaml` file located in this directory.
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Ensure you have unlocked `git-crypt` to view the `username` and `password`.
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*(Note: These are not your main OVH account credentials, but the specific credentials generated for the DynHost record!)*
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## FritzBox Configuration Steps
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1. Log into your FritzBox Web Interface (usually `http://fritz.box`).
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2. Navigate to **Internet > Permit Access > DynDNS**.
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3. Check the box **Use DynDNS** (DynDNS benutzen).
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4. From the **Dynamic DNS provider** dropdown, select **User-defined** (Benutzerdefiniert).
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5. Fill out the fields exactly as follows:
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- **Update URL**:
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```text
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https://www.ovh.com/nic/update?system=dyndns&hostname=<domain>&myip=<ipaddr>
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```
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*(Make sure to copy exactly as written. The FritzBox will automatically replace `<domain>` and `<ipaddr>` with the actual values.)*
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- **Domain name**:
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```text
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dyndns.moritzgraf.de
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```
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- **Username**:
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*(Get the `username` value from `dyndns_ovh.secret.yaml`)*
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- **Password**:
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*(Get the `password` value from `dyndns_ovh.secret.yaml`)*
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6. Click **Apply** (Übernehmen) to save the settings.
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## Verifying the Update
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After saving, the FritzBox should attempt an immediate update.
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1. In the FritzBox interface, go to **Overview** (Übersicht).
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2. Look under the **Connections** (Verbindungen) section. It should say:
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`Dynamic DNS: enabled, <domain>, Status: successfully registered.`
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3. You can also manually ping `dyndns.moritzgraf.de` from an external network to verify it points to your router's current public IP.
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## Important Note on CGNAT and IPv6
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Since your ISP uses Carrier Grade NAT (CGNAT) for IPv4, your public IPv4 address might not be directly reachable from the outside.
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OVH's legacy DynHost system primarily updates A (IPv4) records. If you specifically need external access to your home network via this dyndns domain, the incoming connection might fail on IPv4 due to CGNAT. (This is why we set up the Wireguard Site-to-Site VPN to the K8s cluster!)
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