Create updatedns.sh

updatedns.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Cloudflare zone is the domain itself
+CLOUDFLARE_ZONE="your-domain.com"
+
+# DNS record to update
+DNS_RECORD="subdomain.your-domain.com"
+
+# Cloudflare API key
+API_KEY="your-cloudflare-api-key"
+
+# Cloudflare Email
+EMAIL="your-email@your-domain.com"
+
+# Fetch the current public IP
+CURRENT_IP=$(curl -s http://checkip.amazonaws.com/)
+
+# Fetch the previous public IP from file
+PREVIOUS_IP=$(cat /path/to/ipfile.txt)
+
+if [ "$CURRENT_IP" != "$PREVIOUS_IP" ]; then
+    echo "IP has changed from $PREVIOUS_IP to $CURRENT_IP"
+    # Fetch the DNS record id
+    RECORD_ID=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$CLOUDFLARE_ZONE/dns_records?name=$DNS_RECORD&type=A" \
+        -H "X-Auth-Email: $EMAIL" \
+        -H "X-Auth-Key: $API_KEY" \
+        -H "Content-Type: application/json" | jq -r .result[0].id)
+
+    # Update the DNS record
+    curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$CLOUDFLARE_ZONE/dns_records/$RECORD_ID" \
+        -H "X-Auth-Email: $EMAIL" \
+        -H "X-Auth-Key: $API_KEY" \
+        -H "Content-Type: application/json" \
+        --data '{"type":"A","name":"'"$DNS_RECORD"'","content":"'"$CURRENT_IP"'","ttl":1,"proxied":false}' | jq
+
+    echo $CURRENT_IP > /path/to/ipfile.txt
+else
+    echo "IP has not changed"
+fi