We can connect to Sentinel server via metadata browser by giving host IP address and RMI port number. This works, if no patches are installed on sentinel server, then we are unable to connect to sentinel server via metadata browser and will get the following error:

Connect failed error='SENTINEL_METADATA:Connect:failed to connect  Failed to connect to RMI service '//ax11:1308/apiclientdmn_dev' error 'error unmarshalling return; nested exception is:
UNKNOWN
java.lang.ClassNotFoundException: com.axway.sentinel.share.rmi.socketfactory.SentinelRMIClientSocketImpl (no security manager: RMI class loader disabled)''

If sentinel server versionis 2.3.* , then Copy TrkSec.jar file which comes along with the patch into $CORE_ROOT/java/lib directory and set the CLASSPATH in core_setup file with $CORE_ROOT/java/lib/TrkSec.jar. Then restart the core_servers and you will be able to connect to sentinel server without any problem.

In case of sentinel v3, you should copy the files axway-sentinel-share-3.0.*.jar, axway-sentinel-stub-3.0.*.jar from Sentinel directory to xib\java\lib directory and then please specify these two file paths in CLASSPATH environment variable.Then restart the core_servers and you will be able to connect to sentinel server without any problem.