XP Pro Point-of-Sale server denying connection from front-of-house terminals - Event log shows possible DoS
Posted on 2008-10-23
We have a point-of-sale fileserver in a restaurant with 7 front-of-house terminals, all running XP Pro. Every other day, the terminals fail to connect to the fileserver, even though I can VNC to them from the fileserver and ping back to the server by NetBIOS name (so they are obviously still connected). Upon searching the Windows Event Logs, I found this: Event ID 2027 - "The server has detected a potential Denial-of-Service attack caused by consuming all the work-items. Some connections were disconnected to protect against this. If this is not the case, please raise the MaxWorkItems for the server or disable DoS detection. This event will not be logged again for 24 hours." I need to know how to prevent this and keep the connections open.
The server has 2 separate NICs - one for the internet connection for credit card processing and remote support (they're 250 miles away from me), and another for the internal POS network. Only the POS network seems to be affected, so I am looking for a way to disable the DoS detection for that NIC, if possible, or another reason for the blocked connections with an appropriate solution.