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mrikirill / SynologyDDNSCloudflareMultidomain

Synology DDNS Cloudflare service provider with multidomains and subdomains
https://mrikirill.github.io/SynologyDDNSCloudflareMultidomain/
MIT License
474 stars 72 forks source link
cloudflare cloudflare-ddns ddns ddns-updater dms multidomain subdomain synology

readme

Synology Dynamic DNS with Cloudflare for both multidomains and subdomains

Documentation website: https://mrikirill.github.io/SynologyDDNSCloudflareMultidomain/

Sponsor

📢 Check out the new native version of this agent, written in Kotlin -> KTSynologyDDNSCloudflareMultidomain

Table of contents

What is new

What this script does

Before you begin

Before starting the installation process, make sure you have (and know) the following information, or have completed these steps:

  1. Cloudflare credentials:

    a. Know your Cloudflare account username (or register for an account if you're new to Cloudflare); and

    b. Have your API key - no need to use your Global API key! (More info: API keys).

    image

    c. Create a API key with following (3) permissions:

    Zone > Zone.Settings > Read
    Zone > Zone > Read
    Zone > DNS > Edit

    The affected zone ressouces have to be (at least):

    Include > All zones from an account > <domain>

  2. DNS settings:

    Ensure the DNS A record(s) for the domain/zone(s) you wish to update with this script have been created (More information: Managing DNS records).

    Case for if IpV6 is available (check via https://api6.ipify.org), you can create an AAAA record for the domain/zone(s) you wish to update with this script.

    Your DNS records should appear (or already be setup as follows) in Cloudflare:

    (Note: Having Proxied turned on for your A records isn't necessary, but it will prevent those snooping around from easily finding out your current IP address)

    image

  1. SSH access to your Synology device:

If you haven't setup this access, see the following Synology Knowledge Base article: [How can I sign in to DSM/SRM with root privilege via SSH?[(https://kb.synology.com/en-id/DSM/tutorial/How_to_login_to_DSM_with_root_permission_via_SSH_Telnet)

  1. SRM users: Knowledge of vi:

vi is the only text editor available within the Busybox environment available at the SSH command line on devices running SRM.

For assistance with vi commands, see: Basic vi commands

How to install

  1. SSH with root privileges on your supported device:

    a. For DSM Users:

    Navigate to Control Panel > Terminal & SNMP > Enable SSH service

    b. For SRM users:

    Navigate to Control Panel > Services > System Services > Terminal > Enable SSH service

    image

  2. Connect via SSH: Connect to your supported device via SSH and execute command

  1. Update your DDNS settings:

    a. For DSM Users: Navigate to Control Panel > External Access > DDNS then add new DDNS

    b. For SRM users: Navigate to Network Centre > Internet > QuickConnect & DDNS > DDNS and press the Add button:

    Add/Update the DDNS settings screen as follows:

    • Service provider: Select Cloudflare
    • 🆕Hostname: this field is not used anymore, you can put any value here

    • Username: For a single domain: mydomain.com For multiple domains: subdomain.mydomain.com|vpn.mydomain.com 🆕(ensure each domain is separated: |)🆕

      Note: there is 256 symbols limit on Hostname input

    • Password: Your created Cloudflare API Key

    image

    Finally, press the test connection button to confirm all information is correctly entered, before pressing Ok to save and confirm your details.

  2. Don't forget to deactivate SSH (step 1) if you don't need it. Leaving it active can be a security risk.

  3. You're done! Optional, if you're happy with this script you could buy me ☕ or 🍺 here -> Sponsor

Troubleshooting and known issues

CloudFlare API free domains limitation

CloudFlare API doesn't support domains with a .cf, .ga, .gq, .ml, or .tk TLD (top-level domain)

For more details read here: https://github.com/mrikirill/SynologyDDNSCloudflareMultidomain/issues/28 and https://community.cloudflare.com/t/unable-to-update-ddns-using-api-for-some-tlds/167228/61

Response example:

{
  "result": null,
  "success": false,
  "errors": [
    {
      "code": 1038,
      "message": "You cannot use this API for domains with a .cf, .ga, .gq, .ml, or .tk TLD (top-level domain). To configure the DNS settings for this domain, use the Cloudflare Dashboard."
    }
  ],
  "messages": []
}

Connection test failed or error returned

This will manifest as either 1020 error; or the update attempt not showing in your Cloudflare Audit logs.

That generally means you may not have entered something correctly in the DDNS screen for your domain(s).

Revisit Before you begin to ensure you have all the right information, then go back to Step 4 in How to install to make sure everything is correctly entered.

Handy hint: You can also check your Cloudflare Audit logs to see what - if anything - has made it there with your API key (More information: Understanding Cloudflare Audit Logs). Updates using the API will appear in the Audit logs as a Rec Set action.

Cloudflare no longer listed as a DDNS provider after DSM or SRM updates

After system updates to either Synology DSM or SRM, you may find that:

If this occurs, simply repeat the How to install steps shown above.

Default Cloudflare ports

Source Identifying network ports compatible with Cloudflare's proxy

HTTP ports supported by Cloudflare HTTPS ports supported by Cloudflare
80 443
8080 2053
8880 2083
2052 2087
2082 2096
2086 8443
2095

Debug

You can run this script directly to see output logs

/usr/bin/php -d open_basedir=/usr/syno/bin/ddns -f /usr/syno/bin/ddns/cloudflare.php "domain1.com|vpn.domain2.com" "your-CloudFlare-token" "" "your-ip-address"

Credits

MKDoc - generate documentation

Support this project

If you find this project helpful, please support it here Sponsor