oracle使用utl_http的问题

declare
  soap_request varchar2(30000);
  soap_respond varchar2(30000);
  http_req utl_http.req;
  http_resp utl_http.resp;BEGIN
  soap_request:= '<?xml version="1.0" encoding="utf-8"?>
  <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://service.common.rxn.dbs.com">
  <soap:Body>
    <tns:retrieveFAX>
      <tns:umeroId>f001</tns:umeroId>
    </tns:retrieveFAX>
   </soap:Body>
  </soap:Envelope>';
  
  http_req:= utl_http.begin_request( 'http://XXXXXXXXXXXX:8080/ipe/services/retrieveFaxService' , 'POST' , 'HTTP/1.1');
        
  utl_http.set_header(http_req, 'Content-Type', 'text/xml; charset=utf-8');
  utl_http.set_header(http_req, 'Content-Length', length(soap_request));
  utl_http.set_header(http_req, 'SOAPAction', 'urn:receiveFAX');
  utl_http.write_text(http_req, soap_request);
  http_resp:= utl_http.get_response(http_req);
  utl_http.read_text(http_resp, soap_respond);
  utl_http.end_response(http_resp);END;直接执行上面的sql可以成功触发webservice,
但是把上面这段写道procedure/function/trigger中都会有下面的错误ORA-29273: HTTP request failed
ORA-06512: at "SYS.UTL_HTTP", line 1029
ORA-24247: network access denied by access control list (ACL)
ORA-06512: at "RXN.CALLRETRIEVEFAXSERVICE", line 19
ORA-06512: at line 8
已经配置ACL给指定用户,是否有其它需要设置的