Unable to connect the Java engine through NWDS

Detail

• Issues while adding the JAVA systems in NWDS 

• System asking for OS credentials while calling the MMC
  through port 13

Symptoms

• When we try to add a Java system from NWDS, the system doesn’t  get added. The system doesn’t give any specific error. But the systems are not
  getting added in the eclipse.

• When we access the MMC through port 13, it prompts for credentials.

Reason

From the further analysis that we have conducted it was identified that there is a new security level concept is introduced and the details are in SAP note 1834579.

Solution

Update the DEAFULT.PLF file (/usr/sap/(SID)/SYS/profile) and set service/protectedwebmethods to SDEFAULT. Once the changes are in place the java engine should be restarted.