AWS Oracle – Connection Issue on Oracle Linux 7.4

I tried to install oracle 12c in Oracle Linux 7.4 instance upon AWS ORACLE Linux 64 EC2 instance,
I could make the installation and connect to the database from the ec2 server without any issue however when I try connecting to the database from my desktop I get generic TNS Protocol adapter error.

Please find more information about my instance:
1. I have set following rule for my EC2 instance
instance rule

Please note, I am not sure why i am getting every roles twice also I am not sure why type is 'Oracle -RDS', i always check the type as 'Custom TCP'

2. hostname value from my unix

ip-xx-x-x-xxx.ap-south-1.compute.internal

3. tnsnames.ora

ORCL = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =
ip-xx-x-x-xxx.ap-south-1.compute.internal)(PORT = 1521)) (CONNECT_DATA
= (SERVER = DEDICATED) (SERVICE_NAME = orcl.ap-south-1.compute.internal) )
)

4. listener.ora

LISTENER = (DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ip-xx-x-x-xxx.ap-south-1.compute.internal)(PORT = 1521))
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
) )

3. lsnrctl status

eLSNRCTL for Linux: Version 12.1.0.2.0 - Production on 30-JAN-2018 13:53:11'
Copyright (c) 1991, 2014, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ip-xx-x-x-xxx.ap-south-1.compute.internal)(PORT=1521)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 12.1.0.2.0 - Production
Start Date 30-JAN-2018 13:25:18
Uptime 0 days 0 hr. 27 min. 52 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/12.1.0/dbhome_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/ip-10-0-0-253/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ip-xx-x-x-xxx.ap-south-1.compute.internal)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=ip-xx-x-x-xxx.ap-south-1.compute.internal)(PORT=5500))(Security=(my_wallet_directory=/u01/app/oracle/product/12.1.0/dbhome_1/admin/orcl/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "orcl.ap-south-1.compute.internal" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "orclXDB.ap-south-1.compute.internal" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...
Service "pdborcl.ap-south-1.compute.internal" has 1 instance(s).
Instance "orcl", status READY, has 1 handler(s) for this service...

5. Value from v$instance table

SQL> select host_name, instance_name from v$instance;

HOST_NAME
—————————————————————- INSTANCE_NAME
—————- ip-xx-x-x-xxx.ap-south-1.compute.internal orcl

I am not sure why I cannot connect from outside of ec2 instance; Please help me out of this issue