Network broadcasts and hundreds of ARP cache entries when viewing wityh arp-a

I noticed quite a bit of network traffic on my switches. I identified the network card that was sending out the broadcasts, it was on a new Windows 2000 with RIS & DHCP installed. It is also a DC. When I do a arp -a I can see hundreds of entries such as 10.0.0.2  0000000000000, where the 0000000000000 should be a MAC address its all zero's which make sense as I only have one PC attached to this server. It is as if it is running through all the possible combinations of the DHCP server and trying to resolve a MAC address.

If I re boot it calms down but start after about ten minutes

Any ideas    
johncharnockAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

VinnnnieCommented:
What happens if you disable DHCP? I would not be surprised that a faulty/inconfigured DHCP server would cause a lot of traffic on a network with one PC.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Fatal_ExceptionSystems EngineerCommented:
Also, it is not recommended to put RIS on a DC.  Although it may not be your problem, I thought I might mention it.

Other than that, how is everyone doing today?

FE
IT Pros Agree: AI and Machine Learning Key

We’d all like to think our company’s data is well protected, but when you ask IT professionals they admit the data probably is not as safe as it could be.

Luc FrankenEMEA Server EngineerCommented:
>>Other than that, how is everyone doing today?
I found two orange lights on the server,
A workstations harddisk failed,
Internet site of our company wasn't available today,
E-mail wasn't working today,
Talking about a really bad day :-( Thank god eveything is working now....
Fatal_ExceptionSystems EngineerCommented:
I started to read you comment and thought you were writing a poem.  :)

Remember last Monday when you asked where I was all day?  Yep, sometimes Wednesday feels like Monday!

FE
Luc FrankenEMEA Server EngineerCommented:
>and thought you were writing a poem
I wish I was writing one, today was one of the worst days I've ever had at work. :-(

>Yep, sometimes Wednesday feels like Monday!
Lol!
johncharnockAuthor Commented:
Its not a faulty card as this is a new intel server board with two NICs both have the same problem. It not a Virus as it is a new Install.

John
Luc FrankenEMEA Server EngineerCommented:
>Its not a faulty card as this is a new intel server board with two NICs both have the same problem.
And what tells you the motherboard isn't faulty? Please try to disable both nics and install another one.

>It not a Virus as it is a new Install.
Sorry to say this, but I get really terrified by these kind of comments. Please try scanning for virusses, you can never do this too many times. If it won't help, at least it can't hurt either.
Luc FrankenEMEA Server EngineerCommented:
Please try this:

taken from http://www.grc.com/dos/grcdos.htm
---------------------------------------------------------------------------------------------------------------------
A Quick & Easy Check for IRC Zombie/Bots

If you have managed to read all the way through this lengthy and detailed adventure, I am sure you will agree that you do NOT want any of these nasty Zombies or their relatives running around loose inside your PC. Fortunately, it's quite easy to verify that your system is not currently infected by one of these IRC Zombie/Bots.

All of the IRC Zombie/Bots open and maintain static connections to remote IRC chat servers whenever the host PC is connected to the Internet. Although it is possible for an IRC chat server to be configured to run on a port other than "6667", every instance I have seen has used the IRC default port of "6667".

Consequently, an active connection to an IRC server can be detected with the following command:

netstat -an | find ":6667"
Open an MS-DOS Prompt window and type the command line above, then press the "Enter" key. If a line resembling the one shown below is NOT displayed, your computer does not have an open connection to an IRC server running on the standard IRC port. If, however, you see something like this:
 

TCP   192.168.1.101:1026   70.13.215.89:6667  ESTABLISHED
 . . . then the only question remaining is how quickly you can disconnect your PC from the Internet!
A second and equally useful test can also be performed. Since IRC servers generally require the presence of an "Ident" server on the client machine, IRC clients almost always include a local "Ident server" to keep the remote IRC server happy. Every one of the Zombie/Bots I have examined does this. Therefore, the detection of an Ident server running in your machine would be another good cause for alarm. To quickly check for an Ident server, type the following command at an MS-DOS Prompt:

netstat -an | find ":113 "
As before, a blank line indicates that there is no Ident server running on the default Ident port of "113". (Note the "space" after the 113 and before the closing double-quote.) If, however, you see something like this:
 

TCP     0.0.0.0:113     0.0.0.0:0     LISTENING
 . . . then it's probably time to pull the plug on your cable-modem!  
---------------------------------------------------------------------------------------------------------------------


johncharnockAuthor Commented:
LucF

You were right it was a virus, I had connected to the internet bofore applying SP 4 it was the nachi virus

Thanks
Luc FrankenEMEA Server EngineerCommented:
Glad to see your problem is solved ;-)
Fatal_ExceptionSystems EngineerCommented:
Cool.  Nasty things, those virii.  

Morning, or afternoon to you LucF
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows 2000

From novice to tech pro — start learning today.