In ali cloud server CentOs7.6 jacket oracle12C can normal login sysdba, create user can login in the sysdba, but oracle has been on the local connection server connection timeout, leaders help to see what problem,
Under the oracle user


Check to monitor


Under the root port state, another problem turn off firewall port 1521 will not run


Tnsnames. Ora


Listener. Ora



Local tnsnames. Ora

CodePudding user response:

Estimation is a firewall, try shut firewall

CodePudding user response:

reference 1st floor huanqingdong response:

estimation is a firewall, turn off the firewall try

Connect the firewall is turned off but still not

CodePudding user response:

"But oracle has been showed on the local connection server connection timeout" - this sentence what mean?

CodePudding user response:

You refer to this elder brothers wrote:
https://blog.csdn.net/liver_life/article/details/80258996

CodePudding user response:

The

reference 3 floor minsic78 response:

"but oracle has been on the local connection server displays connection timeout" - this sentence what mean?

Is my local computer ali cloud server via IP connection with Oracle connection

CodePudding user response:

references to freedom and responsibility, 4/f, reply:

you reference this elder brothers wrote:
https://blog.csdn.net/liver_life/article/details/80258996

Now I see a thank you

CodePudding user response:

The client Telnet ali cloud IP and port? Impassability, ali cloud there is need to set the security group strategy, open listener port,

CodePudding user response:

refer to 7th floor freedom and responsibility response:

client Telnet ali cloud IP and port? Impassability, ali cloud there is need to set the security group strategy, open listener port,

The client Telnet port 1521 blocked 22 ports on the client side is so strange

CodePudding user response:

To set the security group strategy to
22 port opened,