Cloudflare DDNS Script for EdgeOS

!!! README !!! Documentation/Usage - Refer to Blog Post

Usage

0 - Prerequisite

Make sure you have following dependencies installed.

• curl
• jq
• ip

1 - Download

Suppose you have already ssh into your EdgeOS based router, in my case, Ubiquiti ER-X(v1.10.11).

1.1 Using Github Raw

cd /config/scripts/ && pwd
# /config/scripts/

curl -LS -o /config/scripts/cloudflare-ddns-edgeos.tar.gz https://github.com/n1cogrv/cloudflare-ddns-edgeos/raw/releases/cloudflare-ddns-edgeos.tar.gz

1.2 Trouble with GFW?

JsDelivr Github CDN

cd /config/scripts/ && pwd
# /config/scripts/

curl -LS -o /config/scripts/cloudflare-ddns-edgeos.tar.gz https://cdn.jsdelivr.net/gh/n1cogrv/cloudflare-ddns-edgeos@releases/cloudflare-ddns-edgeos.tar.gz

2 - Deploy

2.1 - Extraction

tar -xvf /config/scripts/cloudflare-ddns-edgeos.tar.gz

2.2 - Global Parameters Editing

!!! This step is IMPORTANT !!!

Alter variables in /config/scripts/cloudflare-ddns-edgeos/cfddns.sh

Meanings & where-can-be-found of global parameters is provided in cfddns.sh via code comments.

2.2.1 - Cloudflare Access Token

Variable in cfddns.sh - CF_ACCESS_TOKEN

Visit Cloudflare Api-tokens, Click Create Token.

Use Edit zone DNS template.

Fill in the form.

Continue to Summary, and Create Token.

Copy following token string into CF_ACCESS_TOKEN, starting with Bearer .

2.2.2 - Zone Identifier

Variable in cfddns.sh - ZONE_IDENTIFIER.

2.2.3 - Record Name

Variable in cfddns.sh - RECORD_NAME

Full domain name(With subdomain)

eg. subdomain.mijazz.icu, example.subdomain.yourdomain.com

2.3 - Extra Steps

+x to files using chmod +x /config/scripts/cloudflare-ddns-edgeos/cfddns.sh

3 - Test

Before you set it as a scheduled task, dryrun/execute it first.

/config/scripts/cloudflare-ddns-edgeos/cfddns.sh

If it creates and updates your domain record both successfully and correctly, proceed to next step.

Otherwise, feel free to open a issue

4 - Using task-scheduler to cron it

configure

set system task-scheduler task cloudflareddns executable path /config/scripts/cloudflare-ddns-edgeos/cfddns.sh
set system task-scheduler task cloudflareddns interval 20m

commit
save
exit

About this project

Inspired by rehiy/dnspod-shell, I wrote this project. At the beginning, this is just a random script I wrote and configured it on my router with crontab, all because of my sudden switch of dns provider.

There're plenty of ddns(ddns-client) projects on Github.

• Some of them are written in shell-script and don't require extra language or framework support. (I don't want my poor router host a docker container everytime just for ddns update...)

• Some of them are specifically optimized, ( or let's say ) , are only written for cloudflare ddns update, but in other language except shell-script.

Thus, cloudflare-ddns-edgeos aims at

• For routers running EdgeOS (Ubiquiti EdgeRouter), light-weighted design.

• Written in shell-script, avoid complex language and framework dependencies.

• Specifically for Cloudflare DNS update, via Cloudflare v4 api.

And...EdgeOS didn't have official support for ddns on cloudflare, at least not an option in their web-ui. You need to configure it under cli, and it communicates with cloudflare through v1 api (currently v4 is actively supported & maintained by cloudflare)...

Release/Feature History

v1.2.1

• Documentation Support on mijazz.icu.

v1.2

• Continuous-Delivery via Github Action is configured, build and push artifact to releases branch.

v1.1

• Automatically create dns record (No need to create record manually in advance).

• Documentation & comments update (following shell style guideline).

v1.0-hotfix

• Fix script import error. (MUST use absolute path to import cloudflare-ddns)

• Update usage documentation.

v1.0

• Initial release, test passed on er-x.

License

Copyright © 2022 MijazzChan mijazz@qq.com

This work is free. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.