Guides

How to force an authoritative and non-authoritative synchronization for DFSR-replicated SYSVOL (like “D4/D2” for FRS)
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Source: How to force an authoritative and non-authoritative synchronization for DFSR-replicated SYSVOL (like “D4/D2” for FRS)

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Transfer FSMO Roles from a DC
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Is your Primary Domain Controller getting old and in need of replacing?  Need to power it down for an extended period?  Transferring your FSMO roles is very easy to do and can save a big headache down the road.  To transfer the roles just follow the steps below:

  1. type “ntdsutil” and press enter
  2. type “roles”
  3. Next type “connections” when you see “fsmo maintenance:” prompt
  4. Type “connect to server <new dc’s name>” at the “server connections:” prompt
  5. Enter “role” while at the “fsmo maintenance:” prompt
  6. Type “Transfer <FSMO Role to be transferred>” you can also use “?” to get a list of commands including all the FSMO roles.
  7. Click Yes to the prompt which pops up outside of the command prompt

That’s it, your roles have been transferred to a different domain controller.

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Recover FSMO Roles from a dead DC
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As a system administrator you work hard to make sure it never happens by having as much redundancy as you can but sooner or later you will lose a domain controller which has a role assigned to it.  If you have true redundancy you will still have a backup domain controller.

The only problem is the roles will not just transfer over.  You will need to seize them from the dead controller and give the roles to the backup domain controller.

To seize the roles it is very easy, first login into a working domain controller and go to the command prompt with administration rights.  Then follow the steps below:

  1. type “ntdsutil” and press enter
  2. type “roles”
  3. Next type “connections” when you see “fsmo maintenance:” prompt
  4. Type “connect to server <working dc’s name>” at the “server connections:” prompt
  5. Enter “role” while at the “fsmo maintenance:” prompt
  6. Type “Seize <FSMO Role to be transferred>” you can also use “?” to get a list of commands including all the FSMO roles.
  7. Click Yes to the prompt which pops up outside of the command prompt

That’s it, your roles have been seized by the domain controller.

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Add a User to a Linux Group
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If you need to add an existing user to a Linux group it is very easy, just run the following command:

usermod -a -G <group name> <user name>

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RFID Thief v2.0
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This is an interesting project that shows you how you can create a long range RFID reader.  This is another reason why wireless, no matter how short the range, is insecure.

 

Source: RFID Thief v2.0 – scund00r

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