Question

Intrusion Detection Windows Server 2008

Asked by: wn411

Hi, I am in the process of setting up a few servers. The hardware firewall as already setup with policies (Juniper SSG5) and I am also using the host based firewalls as well. I have not been on the servers for a week. So, I logged in today and found a bunch of failed logins on the windows event log. I then took a look the the firewall log and found the same IP over and over again.

I have remote desktop available only via a VPN connection. So how and what are they trying to log into?

This is the current firewall policy:

IID      Source      Destination      Service      Action
4      Untrust/Any      Global/MIP(76.xxx.xxx.200)      DNS
MS-WIN-DNS      Permit

This is the event I have pages of in the firewall:

Date/Time        Source Address/Port        Destination Address/Port        Translated Source Address/Port        Translated Destination Address/Port        Service        Duration        Bytes Sent        Bytes Received        Close Reason
2009-08-24 13:11:01      64.235.99.197:2656      76.xxx.xxx.200:135      64.235.99.197:2656      10.0.0.7:135      MSRPC ENDPOINT MAPPER(TCP)      0 sec.      0      0      Creation
2009-08-24 13:11:01      64.235.99.197:2567      76.xxx.xxx.200:135      64.235.99.197:2567      10.0.0.7:135      MSRPC ENDPOINT MAPPER(TCP)      0 sec.      0      0      Creation
2009-08-24 13:11:01      64.235.99.197:2504      76.xxx.xxx.200:135      64.235.99.197:2504      10.0.0.7:135      MSRPC ENDPOINT MAPPER(TCP)      0 sec.      0      0      Creation
2009-08-24 13:11:00      64.235.99.197:3809      76.xxx.xxx.200:135      64.235.99.197:3809      10.0.0.7:135      MSRPC ENDPOINT MAPPER(TCP)      12 sec.      1326      520      Close -

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Asked On
2009-08-28 at 14:04:11ID24691137
Tags

Attack

,

IDS

,

DDOS

,

Windows Server 2008

Topics

Intrusion Detection Systems (IDS)

,

Windows Server 2008

,

Networking Security Vulnerabilities

Participating Experts
1
Points
500
Comments
5

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Answers

 

Expert Comment

by: wn411Posted on 2009-08-28 at 14:31:50ID: 25211712

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Expert Comment

by: andrewallenPosted on 2009-08-28 at 14:32:44ID: 25211722

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Expert Comment

by: wn411Posted on 2009-08-28 at 15:09:45ID: 25211944

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Accepted Solution

by: andrewallenPosted on 2009-08-28 at 15:17:59ID: 25212000

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Expert Comment

by: wn411Posted on 2009-08-28 at 15:39:05ID: 25212089

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