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showing posts tagged with 'computer'
by lunarg on June 5th 2015, at 14:53

A note of caution: when installing the Fortinet SSO Agent on a server, the option to secure connections from a FortiGate with a password is enabled by default, and a random password is assigned.

You have to turn off or change the password before you add the SSO agent in your Fortigate.

There's no mention of this in the manuals, so now you know...

by lunarg on June 5th 2015, at 10:40
If your inter-domain trust is down, and the eventlog reveals the following error:

Error
There are currently no logon servers available to service the logon request. (0x51F)

Then check the following:

Check whether you can still access the DNS servers at the other side: try using the name first, then try through IP. If DNS does not work, there's an issue with your DNS.

Check whether the DNS zones for the domain are still in place. If it exists, try performing a reload from master. If this fails, you either have connection issues, or the other side has removed the required zone delegation, preventing you from retrieving the zone information.

If you can neither connect through DNS or IP, ch  ...
by lunarg on June 4th 2015, at 15:30
This article briefly explains how to integrate a HP Procurve and Cisco in one network, and make sure the VLANs are correctly routed across the two switches. I avoid using the term "trunk" as the definition of a "trunk" differs greatly between Cisco and HP: a trunk on a HP Procurve refers in fact to a feature like Cisco's EtherChannel, something entirely different.

Note that for VLAN trunking to work between the two, you need to use the 802.1q protocol. Other protocols, such as Cisco's VTP and ISL do not work on HP Procurve, as they are both Cisco-proprietary.

Multi-port trunking is also outside the scope of this article, but the basics remain the same.

For both switche  ...
by lunarg on June 3rd 2015, at 16:08
On Windows 8.1 and Server 2012 R2, SMB 1.0 (aka CIFS) is no longer enabled by default. This means clients that don't support at least SMB 2.0 (for Windows: everything predating Vista/2008) can no longer directly connect to a 8.1/2012R2 server, and instead, are presented with an error if they attempt to do so:

Error
The specified network name is no longer available.

You can re-enable SMB 1.0 support by installing the SMB 1.0/CIFS support feature on your server.

Some users reported that even after enabling this feature, they could not access shares on the server. Apparently, the SMB 1.0 driver is not loaded properly, because of a missing dependency on the Server service (aka LanmanServer).
  ...
by lunarg on June 3rd 2015, at 15:47
As long as there are 2003 domain controllers in your network, your old NT4 workstations will be able to authenticate against your domain. As soon as you migrate those 2003's out of the network, you'll run into trouble. By default, Server 2008 R2 no longer accepts authentication requests from NT4 because they use cryptography that's too old and unsafe.

The best solution is to get rid of those NT4 machines, but if that's not possible, you can re-enable support for cryptography on your DCs through GPO.

Either edit the Default Domain Controller Policy group policy, or create a new GPO in the Domain Controllers OU.

Edit the GPO and navigate to: Computer Configuration > Administrative Templa  ...
by lunarg on June 3rd 2015, at 15:09
SMB (Server Message Block) is an application protocol, most commonly used for file and printer sharing. Although it was originally designed by IBM for use in OS/2, it has been adopted and improved upon by Microsoft as the primary protocol for file and printer sharing in their Windows for Workgroup. It has been in use ever since on Windows and a myriad of other OS flavours.

Although SMB is proprietary to Microsoft, SMB is also available on linux (through Samba), Apple (first Samba, then later, Apple's own SMBX), and a myriad of other OS vendors. In fact, Apple has replaced their own AFP in favour of SMB in their latest releases of Mac OSX. SMB has become the most commonly used protocol for f  ...
by lunarg on June 3rd 2015, at 11:49

A bit of a hidden feature in Windows 8: you can actually "quit" Windows Explorer.

Right-click the (empty) taskbar while holding down Ctrl+Shift to reveal Exit Explorer as an additional menu item. Clicking it will then end Windows Explorer, leaving you with a blank screen, same as ending explorer.exe from the task manager.

You can then call up task manager (Ctrl+Shift+Esc), and start Windows Explorer again (File > Run > explorer.exe).

by lunarg on June 2nd 2015, at 14:01

MXToolBox now also checks DKIM:

http://mxtoolbox.com/dkim.aspx

To use, enter your domain name follow by a colon (:), then the DKIM selector to check (e.g. default)

Example:
mydomain.com:default
by lunarg on June 2nd 2015, at 12:12
I got these messages in the error log of a SQL Server instance:

SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Bound Trees' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'SQL Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Object Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.

I also saw messages about starting a certain database, even though the instance itself remained running. T  ...
by lunarg on May 29th 2015, at 14:51

For some time now, installing/updating Java prompts you to install the Ask.com toolbar and search page. After installation, this is offered each time you install a new update of Java, which can be very annoying. A somewhat undocumented feature is that you can disable these offers from the Java Control Panel, preventing future updates from prompting you to install this thing.

  1. Open the Java Control Panel from the Windows Control Panel.
  2. Click the tab Advanced, scroll all the way to the bottom.
    There, under the Miscellaneous section, check Suppress sponsor offer when installing or updating Java.
by lunarg on May 29th 2015, at 14:43
You can set up an e-mail signature in Office365's OWA (also works with on-premise Exchange 2013 OWA) quite easily. While it's no problem to apply any kind of formatting to your signature, you'll find out that adding images is not as straight forward.

To set up an e-mail signature, follow the steps below.

For best results, use either Internet Explorer or Firefox. Google Chrome has some (minor) issues with OWA.

Log onto OWA. For Office365, this is https://outlook.office365.com/.

Click on the gear icon in the upper-right corner, and choose Options.

In the left tree, follow Mail > Layout > Email signature.

Edit your signature, or copy/paste it from another source (e.g. Word).
If you   ...
by lunarg on May 29th 2015, at 13:24
The old method of disabling Java updates through the registry or GPO, mentioned in this article is no longer valid for Java 7 (1.7) and 8 (1.8), nor does it prevent the UAC prompt from appearing when the updater runs in the background. The method explained here is a better, more up-to-date solution to completely disabling Java updates from running, and includes the required registry change to stop the updater from running, preventing the UAC prompt from ever appearing.

Disabling Java update from control panel is not as straight forward as it seems to be. Java update can only be disabled with administrative rights, so you need to run the Java control panel elevated. Since you can't do this t  ...
by lunarg on May 29th 2015, at 12:46
If you completely want to disable Java Update (which is especially useful on Remote Desktop Servers), you have make a few adjustments to the registry.

EDIT (2015-05-29): this method is depecrated, and only applies to Java 1.6 on Windows XP or older. Only the alternate method is still valid as this prevents the updater program from running.

To disable Java Update, navigate to the key (32-bit and 64-bit differs):

32-bit: HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java Update\Policy

64-bit: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\JavaSoft\Java Update\Policy

Find the value EnableJavaUpdate and set it to 0. This will disable Java Update in the Control Panel.

To prevent the update check  ...
by lunarg on May 28th 2015, at 12:10
You can compile for older versions of the JRE by setting the compiler target compliance level. This allows you to generate class files that are usable on older versions of the JRE as well as the current one.

From your IDE, you will be able to select the compliance level, but if you're compiling manually using javac, this can be done by setting the appropiate command line parameters: -source and -target.

For example, to compile for JRE 1.6, do this:

javac -source 1.6 -target 1.6 MyClass.java

A quick explanation:

-source sets the source compatibility to the specified version, and ensures that your code is usable on the specified JRE.

-target specifies the compliance level o  ...
by lunarg on May 28th 2015, at 11:39

For debugging purposes, I often prematurely abort a function by adding a return statement in the middle of it. With most compilers this works flawlessly, accept with Java...

The Java compiler bums out with an unreachable statement error, and won't allow you to compile a class until all code is reachable within a function.

Luckily, you can trick the compiler by adding an if-statement that's always true:

if (1==1) return;

This way, as the return is supposedly conditional, and the compiler doesn't consider the result of an if-statement, it is tricked into believing the following code is still reachable.

by lunarg on May 28th 2015, at 11:17

A nice article about how to set up NIS on Red Hat linux: http://bradthemad.org/tech/notes/redhat_nis_setup.php.

by lunarg on May 28th 2015, at 10:46

When attempting to log on with a domain account on a computer joined to a domain that has both 2012R2 and 2003 domain controllers, you may encounter the following error:

Error message
unknown username or bad password

Additionally, an Event ID 4 on Source: Kerberos is logged. You can only log on using local accounts.

Solution

Mixed 2012R2 and 2003 AD environments require hotfix 2989971 to be installed on every 2012R2 DC. See the KB for a full explanation.

The hotfix requires Update 1 (2919355) to be installed first. The hotfix is also included in update rollup 2984006.

by lunarg on May 27th 2015, at 15:47
A collegue ran into an issue with Microsoft Outlook (2010) and the AVG Outlook plugin: when attempting to open mails on a shared Exchange mailbox, the message body would be cleared from that e-mail. The message body would be deleted from Exchange itself as well, resulting in other users accessing the mailbox to also see empty message bodies. If a mail contained attachments, they would be left alone.

After a long search, the culprit seemed to be the AVG Outlook plugin. Upon opening an e-mail, the plugin would scan the e-mail, which somehow went wrong, resulting in clearing the message body (probably because it was marked as bad?). Because of the nature of the mailbox (it's a shared Exchange   ...
showing posts tagged with 'computer'
 
 
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