Null Session disable for windows 2003 Domain Controller

Firstsource
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We have disabled Null Session on one of the domain controllers however same seems to be not working.

can someone please let us know the steps.
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Top Expert 2014
Commented:
if you have disabled using group policy then run RSOP.msc and verify that policy is applying.

if rsop.msc is showing configured then try this...

1.    Computer Configuration -> Preferences -> Windows Settings -> Registry

2.    Create a registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\LSA\ RestrictAnonymous

Value Data: (0 = allowed, 1 = restricted, 2 = require anonymous permissions)

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Commented:
thank you

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