3543496 - Secondary connection to HANA DB failed with 10709 + 10061 error

When creating DB remote connection from DBACOCKPIT, test connection failed with error as following:
C  {root-id=F4C25F5CD3341EEF9EE910CFBCE6EDFB}_{conn-id=00000000000000000000000000000000}_0
C  SQLCODE    : -10709
C  SQLERRTEXT : Connection failed (RTE:[89006] System call 'connect' failed, rc=10061:No connection could be made because the target machine actively refused it  {0.0.0.0:63665 -> 100.100.100.100:\
C               30015} (0.0.0.0:63665 -> 100.100.100.100:30015))
B  ***LOG BV3=> severe db error -10709; work process is stopped [dbsh         1324]
B  ***LOG BY2=> sql error -10709 performing CON [dbds         1115]
B  ***LOG BY0=> Connection failed (RTE:[89006] System call 'connect' failed, rc=10061:No connection could be made because the target machine actively refused it  {0.0.0.0:63665 -> 100.100.100.100:30015} (0.0.0.0:63665 -> 100.100.100.100:30 

SAP HANA database as remote connection target.

• 10709
• 10061
• port