I have the Oracle client, weblogic and the SOA suite 11g installed on a Win 7 machine. The Oracle DB is on a server 2008.
I have the hardest time connecting to it. The server name is S2008 on port 1521. I used the RCU to install the schema.
I am able to ping the server. Could someone please help me out in getting this connected? I have not done this configuration before.
Thank you.
This is more of a database concern, not WebLogic.
The simplest thing to do is to confirm you can telnet to port 1521 from the WebLogicmachine (telnet 1521). If this cannot connect, it is either a firewall issue or the TNS listener is not running on port 1521. Check to make sure that port 1521 is opened on the Database host and then try again.
Also, try connecting outside of WebLogic to remove a variable from the problem. This would be easier/faster anyway. Try using SQL developer to connect to the host/port where the database is running. This will show you the ORA-????? error(s) for the connection attempts without having to go through the connection wizard in the weblogic console
Related
I have the task to establish a connection to a Firebird database that is located on a Windows instance. What I was able to accomplish so far was to establish a connection via PHP PDO on my local machine and query the databases.
However, I run into dead ends when I try to connect to the Firebird database that isn't on my PC locally. The database is located on a Windows remote server. The provider opened a port for that gets then redirected to port the Firebird database should be listening to as well (5143 was on my local machine and provider said it was the same on their end. So we try to connect over serveraddress:port and get forwarded to the corresponding port then).
First issue was to get Firebird working in CentOS but I got that down.
Connecting to the specified port I get the error "SQLSTATE[HY000] [335544421] connection rejected by remote interface", any other, not open port, returns correctly "connection refused".
Is it even possible to connect to a Windows remote server? Am I even "connected" / trying to connect to the Firebird database there and it gets declined then?
I read a lot about the rejected by remote interface error but nothing really pops into my mind what it can be.
I tried various setups, tried different ports, we logged on over TeamViewer and set up an ODBC connection locally on the remote desktop which succeeded. Both connections over the 32-bit and the 64-bit ODBC worked. We checked the Firebird versions and they were identical. We even tried to connect from a Windows notebook to the Windows remote.
I basically just want to establish a connection over PHP PDO.
I make a connection for connect to the Database Server (other machine).
Then I found "An error was encountered performing the requested operation:
IO Error: The Network Adapter could not establish the connection
Vendor code 17002".
Please look the picture in URL below.
I tried to make a connection but can't access but my team can access it.
My friend used TNS connection type and I did everthing similar him but can't access. I tried to use JDBC thin for connect but can't also.
I had the old connection which I can connect but why I can't connect the new connection.
You're trying to connect to a machine on a network that SQL Developer is unable to reach.
For a TNS connection,
Look at the appropriate TNSNames entry (you will have a tnsnames.ora) file, and find the IP address or network name associated with the connection you're trying to establish -
And then start by trying to ping that resource.
In this case, i'm trying to talk to a database on MY machine, on port 1521. Yours should look quite different.
If you're using a basic connection, then you can look at the connection properties and see what machine/port you're trying to communicate with.
Ping
If you can't reach that machine from your machine, there's zero chance you can connect to a database there.
So, always start with a ping.
Once you see that you can get to that machine, if you're still getting that message, the next thing to think about is blocked ports, the listener defaults to port 1521, but you'll see that in the TNS descriptor as well.
It usually happens when a another process is running on the same port or there is an absence of listener.
Go to Run>services.msc>OracleXETNSListener>Start
Try to reconnect.. Even if the error still prevail then go to cmd
Use code:
npx kill-port <portnumber>
The port number by default is 1521, but you can check the port number in database properties.
It is possible, that your connection is forbidden by the firewall -
go to Control Panel\System and Security\Windows Defender Firewall - Advanced - Outbound Rules - Add a rule. (If you have some antivirus firewall, add rules there)
Create a temporary TCP rule for your port and another rule for UDP. Allow all nets and comps.
Check the telnet connection as cmd -> telnet ->
open remote.host.address PortNumber
If you can connect now, then the problem IS in firewall - edit your new rules, setting the hosts and nets exactly.
This error is because your sqldeveloper is not able to reach the database server's sql service.
One reason could be lsnrctl is down for some reason.
If you have access to machine where database is installed.
In Windows machine, follow: https://www.youtube.com/watch?v=r9pHqOfV2f0&ab_channel=TLinaTutorials
In Linux/macOS machine: Go to $ORACLE_HOME/bin and check status of lsnrctl
execute from $ORACLE_HOME/bin lsnrctl status, if it's down. Then restart it by lsnrctl start.
Check the details of connection in command output like SID, PORT, HOST etc. and try connecting again from sqldeveloper.
I'm currently running Windows Server 2012 and Oracle Database 12c Enterprise in VMWare Player.
I need to connect to the aforementioned database externally, for example using my host OS to run scripts without developing on the VM itself. How do I go about it?
Any and all help will be appreciated; Thank you.
To anyone who stumbles here; the fix was simple.
Step 1: Make sure you have lsnrctl running.
Step 2: Find your VM's IP address using ipconfig.
Step 3: Use the connection string to access your Oracle DB:
username/password#ip_addr:1521/db_name
1521 can be changed to whatever port you're using.
I have launched an AWS RDS with Oracle 11g (on port 1521).
Tried to connect using Oracle SQL developer. While testing the connection, getting the following error..
Error:
Status : Failure -Test failed: IO Error: An existing connection was forcibly closed by the remote host, connect lapse 0 ms., Authentication lapse 0 ms.
Explored various options and even opened up the windows outbound port from my local laptop to 1521 port. Nothing helped so far a week.
Found a solution..
Just launched another windows instance in AWS and modified security groups to make it secure access.
Security Group changes:
Opened the 1521 port of AWS RDS Oracle to the new windows instance
alone
Windows instance is restricted to only from office public IP.
This does not solve the real problem. However, this solves my purpose..
Thank you all..
My application (linux and windows) connects to oracle through OCI interface. Is it possible to connect to oracle through socks proxy? or some other similar proxy method? Simple ssh tunnel is not enough as I need to access multiple services (including oracle) through single port.
Edit: I have tried configuring the proxy as suggested in the answer, but it did not work. And I could not find anywhere information, that oracle can work through socks5 proxy.
I got the same issue to get solved. Anyway the solution above cannot work. You need to tell the client to just USE the proxy for connection initialization, but the target to connect to is supposed to be the oracle database server IP and port. Other forums read there is no such possibility via tnsnames.ora. But you're supposed to be able to achieve that using the Connection Manager. Haven't found out yet how to even download and install it though...
As I see Oracle doesn't support socks proxy.
To work around this for my self I did following:
Install proxifier www.freecap.ru
Start PL/SQL Developer from freecap
As I can see - this method not always work.
PL/SQL Developer was able to connect to database only on 3-4 try.
But after successful connect - it's seems stable enough for work.
Second option - is to use Java based tools like SQL Developer.
For Java there is system options for using SOCKS5 out of the box.
-DsocksProxyHost=localhost
-DsocksProxyPort=8081
there is official doc about SOCKS in java
Yes, this is possible. Your client tnsnames.ora file (or EZConnect string) should specify the proxy host as the database host, and the proxy listening port as the port. The SERVICE_NAME or SID is whatever the SQL*Net listener on the other side of the proxy is expecting.
[Edit]
If your proxy host is listening and forwarding on 1522, you should be able to:
telnet proxyhost 1522
and see:
Trying xx.xxx.xx.xxx...
Connected to proxyhost.domain.
Escape character is '^]'.