update_dns_cloudflare.sh

#!/bin/bash

# Tu correo electrónico registrado en Cloudflare
CF_EMAIL="correo@gmail.com"
# Tu clave de API global de Cloudflare (asegúrate de cambiarla si aún no lo has hecho)
CF_API_KEY="api_key"
# La IP antigua que deseas actualizar
OLD_IP="1.1.1.1"
# La nueva IP
NEW_IP="1.1.1.1"

echo "Obteniendo lista de zonas..."

# Obtener la lista de zonas (dominios)
zones=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones" \
     -H "X-Auth-Email: $CF_EMAIL" \
     -H "X-Auth-Key: $CF_API_KEY" \
     -H "Content-Type: application/json")

# Para cada zona, obtén todos los registros DNS y actualízalos si es necesario
echo "$zones" | jq -r '.result[] | .id + " " + .name' | while read ZONE_ID ZONE_NAME; do
    echo "Procesando zona: $ZONE_NAME ($ZONE_ID)"
    
    # Procesar registros A
    echo "Actualizando registros A en $ZONE_NAME..."
    records=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records?type=A" \
         -H "X-Auth-Email: $CF_EMAIL" \
         -H "X-Auth-Key: $CF_API_KEY" \
         -H "Content-Type: application/json")

    echo "$records" | jq -r '.result[] | select(.content == "'$OLD_IP'") | .id + " " + .name' | while read RECORD_ID RECORD_NAME; do
        echo "Actualizando registro A: $RECORD_NAME a $NEW_IP"
        update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records/$RECORD_ID" \
             -H "X-Auth-Email: $CF_EMAIL" \
             -H "X-Auth-Key: $CF_API_KEY" \
             -H "Content-Type: application/json" \
             --data '{"type":"A","name":"'$RECORD_NAME'","content":"'$NEW_IP'","ttl":1,"proxied":false}')
        echo "Resultado de la actualización: $(echo "$update" | jq .success)"
    done

    # Procesar registros TXT que contienen la IP antigua
    echo "Buscando registros TXT en $ZONE_NAME que contengan la IP $OLD_IP..."
    records=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records?type=TXT" \
         -H "X-Auth-Email: $CF_EMAIL" \
         -H "X-Auth-Key: $CF_API_KEY" \
         -H "Content-Type: application/json")

    echo "$records" | jq -r '.result[] | select(.content | contains("ip4:'$OLD_IP'")) | .id + " " + .name + " " + .content' | while IFS=" " read RECORD_ID RECORD_NAME RECORD_CONTENT; do
        echo "Encontrado registro TXT para actualizar: $RECORD_NAME con ID $RECORD_ID"
        NEW_RECORD_CONTENT=$(echo "$RECORD_CONTENT" | sed "s/ip4:$OLD_IP/ip4:$NEW_IP/g")
        echo "Actualizando registro TXT: $RECORD_NAME"
        update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$ZONE_ID/dns_records/$RECORD_ID" \
             -H "X-Auth-Email: $CF_EMAIL" \
             -H "X-Auth-Key: $CF_API_KEY" \
             -H "Content-Type: application/json" \
             --data '{"type":"TXT","name":"'$RECORD_NAME'","content":"'$NEW_RECORD_CONTENT'"}')
        echo "Resultado de la actualización: $(echo "$update" | jq .success)"
    done
done

echo "Proceso completado."