Try to access the Java server with Telnet via an incorrect port such as http or https port. Example:
>Telnet localhost 50000
As the port is wrong for Telnet access the connection pends. Kill the connection by pressing enter several times (Windows OS) or ctrl z (Linux terminal). A HTTP/1.0 400 Bad Request will be returned with some server information such as server and ICM versions and system host name.
SAP NetWeaver Release Independent
400 bad http request, security risk, breach, threat, telnet , KBA , BC-JAS-SEC , Security, User Management , BC-JAS-COR , Enterprise Runtime, Core J2EE Framework , BC-JAS-WEB , Web Container, HTTP, JavaMail, Servlets , Problem
About this pageThis is a preview of a SAP Knowledge Base Article. Click more to access the full version on SAP ONE Support launchpad (Login required).
Search for additional results
Visit SAP Support Portal's SAP Notes and KBA Search.