Connection to Server dropped randomly

[SteveDingle]

Hello All,

I posted this in the XP forum but thought I would also try here

PC: Windows XP SP2
Server: Windows 2003

I have been having this problem with my home network for a coupla years now, haven't gotten it resolved yet but have more information so hoping that someone might have new ideas.

I have a server and a coupla PCs attached to it at home. Randomly my PC looses its connection to the server (i.e. I can't access network drives or printer) and the only way I can get back in is to reboot. It usually last at least 1 day but have also had it last multiple days

I created a small program that checks for a file on the a server drive every 30 seconds and if it can't find it ((lost connection) tell me and records the time. Using that I was able to find the following to "security events" which occurred at the same time. I don't know what they mean, hoping someone else will.

*****************
Source: LSARV
Category: SPNEGO (Negotiator)

The Security System detected an attempted downgrade attack for server cifs/Antec2Server. The failure code from authentication protocol Kerberos was "There are currently no logon servers available to service the logon request.
(0xc000005e)".

Next event............

Source: LSARV
Category: SPNEGO (Negotiator)

The Security System could not establish a secured connection with the server cifs/Antec2Server. No authentication protocol was available.
*****************

I should add I'm quite the novice when it come to networking and have even tried to get professional to out to help but I live out of the way and job is just "too small" so never any takers

Thanks
Steve

 

[elmurado]

Have you got any kind of offline files/synchronisation setup?

Do you see this error on the server or client?

This could be to do with the domain and or DC security policy:
Admin Tools>Domain Controller Secuirty Policy>Local Policies>Security Options>Microsoft network Client/Server
Digitally sign communications.

Is this enabled or disabled?



Or perhaps time sync between the client and the server? Are they on roughly the same time?

I'm just throwing up things as I think of them.

Do you get any other associated events in eventviewer?

 

[lhuegele]

Do you have a router, and if so what kind? Do you use a switch, and if so what kind? Have you done any network traffic analysis at all to try and narrow down the problem?

If you are just using a home router, consider getting a switch like the Dell PowerConnect 2708 switch. We've had zero problems since we added a switch to our home network. We have all of our PC's and servers hooked up to the switch. The switch then plugs into our home router.

Good luck,