Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Event ID: 529 is occuring every second in the Security Event log

Posted on 2013-02-07
3
624 Views
Last Modified: 2013-02-11
I am showing just one example of the event in the event log. Event ID occurs almost every second. Is there a way to stop this from happening? This is an SBS 2003 server.....
Event.txt
0
Comment
Question by:csk2512
3 Comments
 
LVL 35

Accepted Solution

by:
Cris Hanna earned 250 total points
ID: 38866930
What are you using for a firewall?   Is port 3389 open?

Don't know what part of the world your in but basically someone is attempting to logon to you network from the IP you show in the log using an account named admin.   These are common attacks when 3389 is open.  People will just keep banging away trying to gain access.

Close port 3389 and I bet these go away.

BTW here's where that IP is located
http://www.findip-address.com/207.112.46.100
0
 
LVL 63

Expert Comment

by:btan
ID: 38867684
Common causes for invalid logon events:
- Forgotten passwords, someone is entering the wrong password.
- An unauthorized individual is trying to gain access to the network.
- There is a persistent network connection with an invalid password.
- There is a service using a user account with an invalid password.
- Trust relationship has been broken.

Logon type = 10 = RDP
This implies you have the RDP port open (3388).

Your options (As far as I can see) are:

Disable port forwarding on the firewall for this port and use the built in Remote Web Workplace. Restrict (on firewall) the allowed source ip to your one (so only you can connect in). Restrict (using IPSEC on the server) the allowed source ip to your one (so only you can connect in.. Passwords, must be strong and changed regularly.  Or have the true administrator acount disabled in SBS - reduced exposure of such high admin priviledge account ...(do have other username instead of the usual "admin" etc)
0
 
LVL 43

Assisted Solution

by:Davis McCarn
Davis McCarn earned 250 total points
ID: 38867968
Plain and simple; someone in Canada is trying to hack into your system.
Nice program to fetch Whois info: http://www.nirsoft.net/utils/ipnetinfo.html

And you have two choices:
1) Compile a list of the allowed ip addresses for remote destop connections and setup ipsec rules to only allow those to access the server: http://www.analogx.com/contents/articles/ipsec.htm (don't forget to allow the local network!)
2) I found a neat utility at Tweaking.com that monitors all RDP ip addresses and gives you another utility which automatically sets an ipsec rule to block those ip's: http://www.tweaking.com/content/page/remote_desktop_ip_monitor_blocker.html
If you do a little research, you can also go to the ipsec policy and change an ip you already blocked to the entire range which will let you slowly block all of Russia, China, etcetera.

It would also be a good idea to make the administrator password really nasty!
0

Featured Post

Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Our Group Policy work started with Small Business Server in 2000. Microsoft gave us an excellent OU and GPO model in subsequent SBS editions that utilized WMI filters, OU linking, and VBS scripts. These are some of experiences plus our spending a lo…
One of the biggest threats facing all high-value targets are APT's.  These threats include sophisticated tactics that "often starts with mapping human organization and collecting intelligence on employees, who are nowadays a weaker link than network…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question