DD-WRT DigitalOcean Dynamic DNS

custom.sh

IPADDR=$(nvram get wan_ipaddr)
DO_KEY="Your DigitalOcean API Key"
DOMAIN="yourdomain.name"
DO_RECORD_ID=id_for_record_you_want_to_update

echo $IPADDR
echo Updating name server

curl -k "https://api.digitalocean.com/v2/domains/$DOMAIN/records/$DO_RECORD_ID" \
-X PUT \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $DO_KEY" \
-d "{ \"data\": \"$IPADDR\" }"

Usage

1. Log in to router web access
2. Setup custom script
   1. Navigate to Administration > Commands
   2. Paste above into text area
   3. Update Variables
      • DO_KEY - A DigitalOcean API Key for your account
      • DOMAIN - The domain you're updating
      • DO_RECORD_ID - The ID of the A record you're updating (you can get that with a get request to https://api.digitalocean.con/v2/domains/$DOMAIN/records
   4. Press Save Custom Script
3. Setup cron to run at desired interval
   1. Navigate to Administration > Management
   2. Insert cron job in Additional Cron Jobs (To run at midnight daily: 0 0 * * * root /tmp/custom.sh)
   3. Press Apply Settings

Disclaimer

This script leverages curl in insecure mode (-k), use at your own risk.