Cloudflare DDNS for linux by shell

A shell script and service to use cloudflare as dynamic DNS.

Setup

Add a relevant DNS record at cloudflare, any record you like such as ::1(AAAA) is okidoki, or you will experience an error.

You need to acquire an API Token (NOT API Key) at https://dash.cloudflare.com/profile/api-tokens ;

Use the template "Edit zone DNS" and follow the instruction;

Remember that Token.

Install the DDNS script:

git clone --depth 1 https://github.com/saeziae/cloudflare-ddns.git
sudo bash install.sh

Configuration file is generated at /etc/cloudflare-ddns.conf, with descriptions

auth_key="CyaEgHaNhelVMarEnOl"    #Your API TOKEN (NOT API Key) at https://dash.cloudflare.com/profile/api-tokens
zone_name="example.com"           #Your domain
record_name="example.example.com" #Your record
record_type="AAAA"                # A for ipv4 and AAAA for ipv6
#REMIND: firstly you have to add the record manually on dashboard, 127.0.0.1(A) or ::1(AAAA) is OK
ip_index="internet"     #internet or local
internet_ip_api="ip.sb" #your api to fetch IP address via internet
eth_card="auto"         #your network adaptor to get IP address locally, use "auto" to use default

Edit it following the instuction

systemctl enable --now cloudflare-ddns

Uninstallation

sudo bash uninstall.sh

Configuration file will be removed together.

Common problems

1. {
     "success": false,
     "errors": [
       {
         "code": 10000,
         "message": "PUT method not allowed for the api_token authentication scheme"
       }
     ]
   }

   Add a relevant DNS record firstly at cloudflare dashboard, any record you like is okay. For example, if you want to use DDNS for aaaa.example.com with ipv6, add an AAAA record ::1 for aaaa for example.com.