Network Resource Disconnecting

What could cause a Win2K Server to terminate it's sessions available on shared folders? Yesterday...no problems. Today (after no changes/no re-boots) I can only access my shared folders from other computers on my LAN for a couple seconds before they becaome "unavailable" If I go into the computer managment screen on my server and view the connections I can see the other computers connected..but I have to kick them off in order for them to re-connect... any ideas?
NickJPhillipsAsked:
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meverestCommented:
client access licenses?

how many do you have, and how many are connected?

Cheers.
Fatal_ExceptionSystems EngineerCommented:
Yea, that would be my guess, mev...
NickJPhillipsAuthor Commented:
right now because we are testing in a safe environment, there is only three computers involved...the CAL covers at min 5 computers right? Our's covers a lot more
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Fatal_ExceptionSystems EngineerCommented:
Have you joined all three computers to your test domain too?  What OS's are your clients using?
NickJPhillipsAuthor Commented:
Yes, as I said in my post, everything was woorking yesterday with NO problems. Today, there seems to be problems. I am not sure what the difference is. Logic says that with no change, there can be no change....
NickJPhillipsAuthor Commented:
OH, sorry. XP Pro for my three test computers...Win2K Server for my domain server. Actually.... the computers have been removed from the domain, and are connected through the network neighborhood...
Fatal_ExceptionSystems EngineerCommented:
>> the computers have been removed from the domain, and are connected through the network neighborhood...  ?<<  

Now I am getting a little confused.  They are removed from the domain?   And using Network Neighborhood?  (assume a workgroup?)  If this is true, then you are connecting via the browser list using NBT (Netbios over TCP), and not using DNS and the Active Directory ACL's for permissions, since the computer accounts no longer exist within AD.  To test a domain, you need to keep them joined to the domain....

Is this what I am reading?

FE
NickJPhillipsAuthor Commented:
I am not really worried about the domain at all...The server computer is set up as a web server only. As an after thought it was discussed if it could be safely set up as a file server as well. This would allow easy transfer of the web files as well as a central place to keep any others... make sense?
Fatal_ExceptionSystems EngineerCommented:
Well, usually web servers are not very secure, as they allow anonymous access to the server...  that is why many times they (web servers) are placed in a DMZ.  So, my response is no, it does not make much sense to allow users to store files on a webserver, unless they are used specifically in an FTP manner, not as a 'file server'.

If you do want to only allow Authenticated Access, then uncheck the Anon box in the IIS console, and use Windows Authentication...   Note that you will not be able to allow anon requests to the server then.  Still best to use this in a Domain though, not a workgroup...

FE
meverestCommented:
I would not worry too much about sharing folders on a web server to internal users, so long as the web server is on some kind of DMZ (which it *should* be anyway if it is a web server! ;-)

i do not agree that adding the ability for internal users to manage web content directly is less secure than allowing them to do it via ftp.

cheers.
NickJPhillipsAuthor Commented:
and thats the basis for our experiment. From what we found out it is faster to use to the lan directly, than even using FTP over the LAN by playing with the hosts file, and pointing the DNS to the host computer... so we were hoping to be able to set up the web server and share files from it at the same time. IT was working just fine, but the other day we started to lose network resources on the server from our clients.

We started by uploading about 200 picture files...almost 800megs of data in 2 mb files.... we got about 80-100 megs into the transfer when it shut dwn. The only way to fix it was to go into the server computers "computer manager" and disconnect the computers connected...then start over.

Hope that is clearer.
Fatal_ExceptionSystems EngineerCommented:
I just don't think it is a good idea to use this server as a multifunction file and web server.    But..  regarding the specific problem...

This very well could have been caused by a bottleneck on the server.  Bottlenecks can take place in many forms, including Disk I/O (physical and/or logical), NIC card speeds, memory, or even processor...  When you setup a server, the very first thing you do when you bring it on-line is to create a baseline using the System (Performance) Monitor...  Then, as a problem presents itself, you can start a log of the performance using specific counters to compare the problem to the baseline, and identify the cause of the problem...  

but, since I would wager that only 10% (if not less) of Network/System Admins actually create the baseline, I suppose you too do not have one for Troubleshooting this problem...?   (I am just saying this as I am thinking back on the two years I was a consultant, walking into probably over 100 company networks, and asking if they had a baseline.  Come to think about it, not one did..  :)   Now, if you do have one, then start running performance logs on that server to find out where that bottleneck is.  !!
Program_PoserCommented:
It sounds like this is Windows 2000 WORKSTATION and not Server?  Workstation is limited to the # of connections it can have.. I don't think CAL's has anything to do with it, you will just get the annoying License Manager event log notification when you run out, to my knowledge, there is nothing that checks the connections against the CAL's and manages that.  Its the 'honor' system if you will, since you can add any # of CAL's to the license manager without any codes, authorizations, etc.

Perhaps IIS has been configured to allow only a certain # of connections, check that out in the web site, but it sounds like file sharing was the primary issue?  

Also, check to see if there is anything wrong with the server service?

Just some thoughts.. Hopefully one of them helps.

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Windows Networking

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