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Windows 7: Problems with NTLMv2 Authentication

05 Nov 2010   #1
duckboy81

W7
 
 
Problems with NTLMv2 Authentication

Hey there guys,

I work where they use NTLMv2 on the network and it seems that only a few of my applications know how to deal with it (Mainly MS programs and firefox). What is odd, is that when I run HotSpot Shield, it connects flawlessly and redirects all my traffic through there without any disturbances. I wouldn't like to use that program because it's ridiculously slow, and I was trying to figure out if there is a way to fix the programs that don't handle the NTLMv2 correctly...

Thanks!


My System SpecsSystem Spec
.
06 Nov 2010   #2
chev65

Windows 7 Ult, Windows 8.1 Pro,
 
 

You can't update the older programs which aren't made to use NTLMv2 authentication, so you would need to do these adjustments on the Windows 7 machines.

Control Panel - Administrative Tools - Local Security Policy

Local Policies - Security Options

Network security: LAN Manager authentication level
Set to Send LM & NTLM responses only

Set the Minimum session security for NTLM SSP
Disable Require 128-bit encryption

The screen shots below should be helpful.

Reboot all machines after making the adjustment.

My System SpecsSystem Spec
07 Nov 2010   #3
duckboy81

W7
 
 

Thanks!

I believe our domain controller has it set at a different value. Is it possible to by pass this?
My System SpecsSystem Spec
.

07 Nov 2010   #4
chev65

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by duckboy81 View Post
Thanks!

I believe our domain controller has it set at a different value. Is it possible to by pass this?
Those adjustments are for the Windows 7 machines to allow it to work with older servers and programs that were made before this level of authentication was developed.
My System SpecsSystem Spec
Reply

 Problems with NTLMv2 Authentication




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