Nor do you to hit the obvious ports?  LDAP, KDC and possibly Ports
135-139,445  along with identifying the stack as Microsoft gives an idea
authentication may take place on this host?  

Depends how much you really want to hit the host?  Other than that go for
the SVR records from DNS.

Ian 

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Carlos Perez
Sent: 26 March 2010 01:10
To: PaulDotCom Security Weekly Mailing List
Cc: [email protected]
Subject: Re: [Pauldotcom] detecting PDCs

Well for DNS you do not have to be

Sent from my Mobile Phone

On Mar 25, 2010, at 8:12 PM, "Butturini, Russell"
<[email protected] 
 > wrote:

> These solutuons are useful, but you're assuming a machine joined to  
> the domain, running in the context of an authenticated user session,  
> with knowledge of the internal domain name.
>
> ----- Original Message -----
> From: [email protected]
<[email protected] 
> >
> To: PaulDotCom Security Weekly Mailing List
<[email protected] 
> >
> Sent: Thu Mar 25 16:36:13 2010
> Subject: Re: [Pauldotcom] detecting PDCs
>
> Indeed.
> Similar to ethe cho %logonserver% method is:
>
> Systeminfo | findstr /I /C:"logon server"
> But a nice way is to get it from dns:
> Nslookup -type=srv _ldap._tcp.pdc._msdcs.<domainname>
> Will give you the same answer as logonserver, to see all DC's change
> pdc to just dc. I got 8 DCs doing this at work all of which I know are
> dcs
> -Josh
>
> On Mar 25, 2010, at 5:07 PM, k41zen <[email protected]> wrote:
>
>> depends on how auth'd you are to the domain I guess, but dsquery is
>> very useful too
>>
>> http://www.computerperformance.co.uk/Logon/DSquery.htm
>>
>> http://tactech.net/2009/09/28/how-to-search-for-a-domain-controller/
>>
>> http://technet.microsoft.com/en-us/library/cc732885%28WS.10%29.aspx
>>
>>
>> On 25 Mar 2010, at 10:54, Robin Wood wrote:
>>
>>> Hi
>>> I'm wondering what techniques people are using to detect domain
>>> controllers when they get on networks. I've asked a few people and
>>> the
>>> standard answer seems to be to look for the DNS server as the PDC is
>>> usually also acting as the DNS server. Has anyone else got any  
>>> better
>>> or alternative techniques they use?
>>>
>>> Robin
>>> _______________________________________________
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>>>
>>
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