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Subject Author Date
blocking brute force login attempts PJ6 11-26-2007
Posted by PJ6 on November 26, 2007, 2:09 pm
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 (Windows Server 2003): I thought using windows firewall to restrict the IP
addresses allowed to talk to remote desktop would have been enough to block
brute force login attempts on administrator, but my event log is still
filling up from IP addresses outside of those I've specified as allowable
(???)... I already renamed admin to something completely different, so
they'll never succeed. But is there a way to stop it? I only have ports open
for remote desktop and web service.

Paul



Posted by Mathieu CHATEAU on November 27, 2007, 2:11 am
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 Hello,

How did you block access ? with a firewall ?

Does your IIS allow authentification ? If it's not needed, remove the
integrated authentification & basic.

You may change the RDP TCP port to get a more "discrete" door
You may use the ripe or other databases to find IP owner and send a mail to
their abuse email.


--
Cordialement,
Mathieu CHATEAU
English blog: http://lordoftheping.blogspot.com
French blog: http://www.lotp.fr


> (Windows Server 2003): I thought using windows firewall to restrict the IP
> addresses allowed to talk to remote desktop would have been enough to
> block brute force login attempts on administrator, but my event log is
> still filling up from IP addresses outside of those I've specified as
> allowable (???)... I already renamed admin to something completely
> different, so they'll never succeed. But is there a way to stop it? I only
> have ports open for remote desktop and web service.
>
> Paul
>


Posted by Unkown to Xnntp on February 3, 2008, 9:33 am
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Hi,

That is a big weakness of the RDP protocol which uses the terminal services
functionality of w2k3 because you cannot specify which clients can connect.

I use a program called SecureRDP by 2X and it can filter by your RDP
connection by IP, computer name, time, etc. Great program and its free.

JJ


> (Windows Server 2003): I thought using windows firewall to restrict the IP
> addresses allowed to talk to remote desktop would have been enough to block
> brute force login attempts on administrator, but my event log is still
> filling up from IP addresses outside of those I've specified as allowable
> (???)... I already renamed admin to something completely different, so
> they'll never succeed. But is there a way to stop it? I only have ports open
> for remote desktop and web service.
>
> Paul
>
>
>


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