Category Archives: Windows

Enable Flash and use Enterprise Manager <= 13.3 in 2021

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Of course you should update to Enterprise Manager 13.4 (or later) after the 12th of January 2021. Ok, so you don’t want to or you can not do this at this moment or I need it NOW!

There are two things happening here. 1) Adobe implemented a kill-switch that you can not use Flash anymore after the 12th of January and 2) your browser stopped supporting/running Flash.

This blog post is about issue 1. The ‘kill-switch’.

Adobe’s Flash “Enterprise Enablement”

What?! Yes, you can still run Enterprise Manager with Flash after the 12th of January 2021, but you need to do something called “Enterprise Enablement” and have sites be placed on the Flash Allow List.

Read about it in the Adobe Flash Player Administration Guide for Flash Player 32.

Create a Flash Allow List

Be warned, outdated Flash is unsafe…! Enable it for EM only (AllowList it).

Flash implemented a kill switch, so you can not use Flash anymore after the 12th of January. Luckily you can allow site to still run Flash!

Create the following file mms.cfg as Administrator and save it in C:\Windows\System32\Macromed\Flash\ and C:\Windows\SysWOW64\Macromed\Flash\ .

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Authenticate Oracle 12c database users against Active Directory

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Following is tested with Oracle 12.1 on Linux 6 (on Exadata) and a Windows 10 client.

“Yet another blog on how to authenticate database users against Active Director using Kerberos…”

I have read and tried a view blogs on how to get this done, but somehow I have found them a bit limited because they talk about a simple configuration with one database on one host. When you have to deal with multiple hosts and multiple databases per host, you need to take some things into account.

Lets start with some explanations, a walk through is below that.
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SQLNET.KERBEROS5_CONF_MIT : Unsupported Parameter in 12.1

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https://docs.oracle.com/database/121/NETRF/changes_rf.htm#NETRF2100

  • Unsupported ParametersThe following parameters are no longer supported: 
    • SQLNET.KERBEROS5_CONF_MIT

No it’s not!

If you leave it out, you will get:

Password for airell@[logging]:

In stead of:

Password for airell@DOMAIN.LOCAL:

If you leave it out, one must not use the MIT layout… but where is the non-MIT layout described? It looks like the domain must be present on the first line of the file… for now, I will still use the MIT layout.

Cheers!

 

Enabling Oracle 12c direct NFS client on Windows

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Yes, enabling the Oracle 12c direct NFS client on Windows and it is documented, but I didn’t get changed on Oracle Support (I have send an improvement request for Doc ID 1468114.1)…

One needs to run ‘%ORACLE_HOME%\bin\enable_dnfs.bat’ now, which does NOT copy the ‘oranfsodm12.dll’ over the ‘oraodm12.dll’, but it copies the ‘oranfsodm12.dll’ to the ‘%ORACLE_HOME%\rdbms\lib\odm\’ directory!

After the file has been copied and Oracle is restarted, the [Oracle instance running with ODM: Oracle Direct NFS ODM Library Version 3.0] line in the alert.log is shown!

Enabling Direct NFS Client – documentation

Oracle Database Installation Guide for Microsoft Windows – Oracle Database Postinstallation Tasks – 7.5.1.5 Enabling Direct NFS Client: http://docs.oracle.com/database/121/NTDBI/postcfg.htm#CHDFGFDC

ps. on Windows the supported ‘nfs_version’ is still NFSv3 :(

Remove Oracle Database Options with chopt in 12c

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In 10g and 11g Enterprise Edition, one could select which options to install or not to install during the installation process (excl. the 10g ‘custom database’ option, you would get partioning, OLAP and rat). In 12g, one is not able to choose during install anymore, you will get all the options and they must be removed afterwards. Remove / disable them after installing the database software (only), but before creating databases.

The best way to do this is using the ‘chopt’ tool, or when the option is not available, the Oracle Universal Installer must most likely be used. It’s available in Windows and Linux. When using Windows, one can also rename the .dll’s which ‘enable’ the options. It will NOT remove the objects from the database! Continue reading →

Running VBoxManage.exe from Windows Task Scheduler

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I have been trying to run VBoxManage.exe from the Windows Task Scheduler to periodically list vms. The problem I had was that it wouldn’t list the VM’s I had registered, even if the task was run as the user that created the VM’s and with the ‘Run with highest privileges’ selected.

When searching the Internet, I saw more people having difficulties running it this way, so I started experimenting. Using ‘psexec‘ and ‘runas’ (use the /savecred option and run it once manually from command line) did work when running the VBoxManage.exe as the VM’s creator user while being logged as someone else, but running it from the Task Scheduler still did not work. Continue reading →

Internet Explorer 10 ‘Continue to this website’ option missing

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I recently updated to Internet Explorer 10 (Windows 7 64bit) and when I browsed to a website with a security certificate problem: “There is a problem with this website’s security certificate.”, the “Continue to this website (not recommended).” option was missing!!!

The issue here is that Microsoft restricted access to pages which are using a key using less than 1024 bits for protection. Some Oracle product using websites (including Oracle VM Manager) are still using this!

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VirtualBox VRDP authentication fails with mstsc.exe

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I had this problem, when trying to connect with the External Authentication Method, using the Remote Display server in VirtualBox (4.1.8 and 4.2.0). When I want to connect with Microsoft’s Remote Desktop (mstsc.exe), it failed every time with “Your Remote Desktop session has ended. Your network administrator might have ended the connection (…)”.

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Oracle SQL Developer and a SQL Server Instance

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Sometimes… as Oracle DBA you need to connect to SQL Server (with Oracle SQL Developer and jTDS plug-in installed).

When using ‘SQL Server Management Studio’, the ‘Server name’ is in the format:

SERVERNAME\INSTANCE.

This won’t work in SQL Developer:

Status : Failure -Unknown server host name 'SERVERNAME\INSTANCE'.

This can be solved using the ‘hostname’ in the next format in SQL Developer:

SERVERNAME;instance=INSTANCE

For me it worked :)