MasterDnsVPN 在连接到 Oracle Cloud (OCI) 后对 DNS 请求的响应出现问题 - 端口 53 发生冲突和域名问题

I am running MasterDnsVPN on an Ubuntu 22.04 instance in Oracle Cloud Infrastructure (OCI). The service starts successfully and listens on port 53, but after the client connects, the service does not respond to any DNS requests (e.g. google.com). I have tried several different configurations but I am unable to get it to work natively. Here are the steps I took to reproduce the problem: