您好,看这里的例子,RDS for PPAS 可能有公网的地址,形如:rdsv07z563m7o25cj550public.ppas.rds.aliyuncs.com请参考:RDS for PPAS实例连接,https://help.aliyun.com/document_detail/rds/getting-started/RDS-PPASManual/instance-connecting.html外部服务器能否访问阿里云的RDS?,https://help.aliyun.com/knowledge_detail/5974280.html