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11.02.2007 at 05:05PM PDT, ID: 22936172
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How to disable NTLM in Windows 2003 server

Tags: ntlm, disable, 2003, windows
How does one disable NTLM in Windows 2003 server? And is there any issues regarding disabling NTLM?

My SSL VPN router requires that NTLM be disabled for file sharing.

Thanks
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Question Stats
Zone: OS
Question Asked By: john_s99
Solution Provided By: opie6373
Participating Experts: 2
Solution Grade: A
Views: 161
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11.02.2007 at 07:26PM PDT, ID: 20205693

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11.02.2007 at 07:45PM PDT, ID: 20205738

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11.02.2007 at 08:51PM PDT, ID: 20205876

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11.02.2007 at 10:11PM PDT, ID: 20206012

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11.02.2007 at 10:37PM PDT, ID: 20206056

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11.03.2007 at 03:57AM PDT, ID: 20206467

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11.03.2007 at 04:57AM PDT, ID: 20206591

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11.02.2007 at 07:26PM PDT, ID: 20205693

Rank: Master

there is a ntlm security support provider service that can be disabled.  it shouldn't affect computers logging into your domain as that user kerberos.  only pre windows 2000 uses ntlm.  

other than in IIS it can also be disabled
 
11.02.2007 at 07:45PM PDT, ID: 20205738

Rank: Genius

jump into your poilicy (GPO) Under computer settings - windows settings - security settings - local policies - security options - network:

There is an NTLM policy there where you can specify not to use anything pre NTLM V2
 
11.02.2007 at 08:51PM PDT, ID: 20205876
so i run gpedit.msc and make the change to computer settings - windows settings - security settings - local policies - security options - network:NTLM policy?

 
11.02.2007 at 10:11PM PDT, ID: 20206012

Rank: Genius

yup yup, though if you want to effect all machines, you will need to do it in the default domain policy
 
11.02.2007 at 10:37PM PDT, ID: 20206056

Rank: Master

if he only needs to disable it on that one server, i would think disabling the "ntlm security support" service and setting its startup type to disabled would work as well no?  
 
11.03.2007 at 03:57AM PDT, ID: 20206467
So under domain security policy I would change this option?

Network security: LAN Manager authentication level

And what would I change it to? i.e.

Send NTLMv2 response only:
Send NTLMv2 response only\refuse LM:
Send NTLMv2 response only\refuse LM & NTLM

 
11.03.2007 at 04:57AM PDT, ID: 20206591

Rank: Master

the last one

"send ntlmv2 response only\refuse LM & NTLM"
Accepted Solution
 
 
20080236-EE-VQP-29 / EE_QW_2_20070628