HOW TO CONNECT FROM CLIENT MACHINE TO REMOTE MACHINE(SERVER DATABASE MACHINE)

Hi friends.
I need your valuable help,
I am using oracle 11g database.
I have two system.One is client machine and installed oracle 11G client software.
and from this machine user can connect remote server database(This is old remote system, this is just for Information).
And i have created one new database called RMANP in new remote server machine (this is the machine, in which i need to connect from client machine)
ex
CLIENT MACHINE DETAIL IS:
system66
ip address is 192.162.21.66
REMOTE SEVER MACHINE DETAILS IS:
system56
ip address is 192.162.21.56.
and i add entry on client machine tnsname.ora file like following,
RMANP=
(DESCRIPTION=
   (ADDRESS=
     (PROTOCOL=TCP)
     (HOST=192.168.21.56)
     (PORT=1521)
   (CONNECT_DATA=
     (SERVICE_NAME=rmanp)
But when i try to connect to remote server from client machine in sqlplus, i am getting an error, Like following,
SQL> CONN SYS/SYSPW AS SYSDBA;
ERROR:
ORA-12560: TNS:protocol adapter error

2684285 wrote:
Hi friends.
I need your valuable help,
I am using oracle 11g database.
I have two system.One is client machine and installed oracle 11G client software.
and from this machine user can connect remote server database(This is old remote system, this is just for Information).
And i have created one new database called RMANP in new remote server machine (this is the machine, in which i need to connect from client machine)
ex
CLIENT MACHINE DETAIL IS:
system66
ip address is 192.162.21.66
REMOTE SEVER MACHINE DETAILS IS:
system56
ip address is 192.162.21.56.
and i add entry on client machine tnsname.ora file like following,
RMANP=
(DESCRIPTION=
   (ADDRESS=
     (PROTOCOL=TCP)
     (HOST=192.168.21.56)
     (PORT=1521)
   (CONNECT_DATA=
     (SERVICE_NAME=rmanp)
But when i try to connect to remote server from client machine in sqlplus, i am getting an error, Like following,
SQL> CONN SYS/SYSPW AS SYSDBA;
ERROR:
ORA-12560: TNS:protocol adapter error
There is nothing in your connect string to tell sqlplus which database you want to connect to. Therefore it assumes (by default) that you want to connect to a *local* database whose name is identified by the value of the environment variable ORACLE_SID. And there is no such database, so he gets the reported error trying to establish a connection to a non-existent local service.
You need to specify your target database, thusly:
SQL> conn sys/syspw@rmanp as sysdba
BTW, connecting to a remote database as sysdba is considered by most DBAs to be a big secruity breach. If you really need sysdba privileges (rare) you should be logged on to the database server machine with proper OS credentials, and work from there.
Also, TYPING IN ALL CAPS IS PERCEIVED AS SHOUTING.

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HOW TO CONNECT FROM CLIENT MACHINE TO REMOTE MACHINE(SERVER DATABASE MACHINE)

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