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matt

May 12th, 2008

Did you know that your Acitve Directory is just a glorified LDAP?

Microsoft Tube Surfers,

Wanted to take a minute to talk about authenticating Splunk against Active Directory. In case you didn’t know Active Directory is running on top of LDAP. While the guys up in Redmond do their best to make sure tha you have no need to know LDAP they give you the ability to interface with it over LDAP if you know what you’re doing. Let’s take this time to let you know what you need to do.

If you are comfortable with the command line you can run the command ldifede. The ldifde command is the windows equivalent of ldapsearch and should allow you to get an ldif entry for yourself and a group. With those two entries we should be able to come up with authentication.conf that will allow Splunk to authenticate users.

For those of you that are more comfortable with a GUI The Sysinternals team offers a nice utility called Active Directory Explorer. This gives you tree view of your Active Directory/LDAP structure.

The information provided from these utilities is pretty much everything you need to know in order to follow along with the documentation. If you are still struggling to get it working send an email to support@splunk.com with the output from the ldifde command and your authentication.conf and someone from team will help square you away.

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April 30th, 2008

Help Me Help You

Peoples of the Interweb,

As one of the Splunk Support Monkeys I am going to try to start a semi-regular series of posts on a topic that is near and dear to me — getting the Splunk community to be able to troubleshoot their issues without the need to reach out to the Support Team.

The most important piece of any troubleshooting exercise is getting a solid understanding of the problem. The common statement “Shit is broke” while ’summarizing’ the problem doesn’t do much in the way of isolating the specific problem. Taking a minute or two to think about the problem at and documenting the sequence of events leading up to the problem goes a long way to getting outsiders up to speed on the issue.
Here are few things to keep in mind when working with support:

I don’t work in the next cube over.

This means I don’t have insight into all of the other moving parts of your network. Try avoiding acronyms that are specific to your organization. I don’t know the naming convention that you use for machine names, so if one box is in LA and the other is New York tell me, don’t expect me to know that foo.company.com is sitting in the LA data center.

Less is not more.

You can never give a support engineer to much data. Often times folks think that they have identified the offending error message in the logs and provide that one line in their support ticket. The problem with this is that the support engineer does not get the benefit of context. Most errors are the result of a series of events leading up the final failure. Being able to see what was going on leading up to the problem often times is what allows

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April 24th, 2008

On the off chance you need help with Windows

Hello Internets,

As one of the splunkers responsible for answering the phone I’m going to use this space to talk about something near and dear to my hart — empowering my customers so they are able to figure out their own problems thereby allowing me read FARK all day long.

Since we recently released our Windows version a bunch of the folks in the office have been trying to figure out how they do the things they do in a UNIX enviornment (like wget a file) in Windows. I’ve been sharing some of my favorite Windows resources here at the office and figures the rest of you would probably like to know about them as well.

Google
Everyone seems to start here when they are looking for something. Most however don’t know that http://www.google.com/microsoft will restirct your search to Windows sites. They also have these search sites for linux, bsd, and the mac.

SysInternals
Mark and Bryce have created the ultimate coolection of free Windows utilities. Simple executables that allow to get so many of the diagnostic/monitoring things that a UNIX admin takes for granted. Some of my favorites (and especially useful in working with Splunk) in no particular order:

  • AccessEnum
    Lets you see who has access to what. This is really helpful when trying to figure out why Splunk isn’t indexing one of your files.
  • Process Monitor
    Watch the registry, running process/thread/DLL, and file system usage in real-time
  • PS Tools
    A bunch of command-line utilities for listing the processes running, working with the event log, rebooting the machine, etc.
  • Active Directory Explorer
    Advanced viewer/editor for Actiive Directory. This will be a godsend you are trying to configure Splunk to authenticate against your domain controller
  • WhoIS
    Doesn’t do much in the way of troubleshooting Splunk, but who doesn’t want to be able to see if ultramegaextrmeme.com is available and if not

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