diff --git a/lib/requestHandler.js b/lib/requestHandler.js
index 6a6c6c034..062553ba4 100644
--- a/lib/requestHandler.js
+++ b/lib/requestHandler.js
@@ -295,6 +295,14 @@ function getUserReqHandler(userRule, recorder) {
     // construct the original headers as the reqheaders
     req.headers = util.getHeaderFromRawHeaders(req.rawHeaders);
 
+    // refer to https://github.com/alibaba/anyproxy/issues/555
+    // prevent request to proxy port
+    const selfIpAddresses = util.getAllIpAddress()
+    selfIpAddresses.push('localhost')
+    
+    const isSelfIpAddress = selfIpAddresses.find((ip) => host === `${ip}:${reqHandlerCtx.httpServerPort}` && req.method !== 'CONNECT')
+    if (isSelfIpAddress) return userRes.writeHead(405).end()
+
     logUtil.printLog(color.green(`received request to: ${req.method} ${host}${path}`));
 
     /**