I have recently experienced a strange problem. A client of our had his DSL go down and it caused the LAN to slow to a craw. They are running Quickbooks 2008 with the database on the server and it got so slow that they could not access Quickbooks, other files were still accessible albeit slowly. When the DSL service was restored thing started working normally again. This appears to be repeatable.
Their setup is as follows:
Server with two NICS (LAN and WAN) WAN connected to a DSL modem running in Bridge mode.
Suse 9.3 OS
Dansguardian Internet Content Filter
Quickbooks 2008 in Alternate configuration (See this link)](http://support.quickbooks.intuit.com/support/pages/knowledgebasearticle/1000759)
The process went like this:
Client calls complaining no internet and LAN slow and Quickbooks not working.
We move Quickbooks to a Windows box temporally to get them up and running
We begin troubleshooting and discover no WAN IP being delivered.
We call ISP and they determine modem to be defective and will send new modem.
Next day ISP tech arrive and says modem is not bad, DSL had been down and is back up now.
We move Quickbooks back to server and everything is working fine.
We inform client it appears his LAN was disrupted because his WAN was down. Weird huh?
Three days later Quickbooks stops working again and client does not bother to call us because he knows the DSL is down (not even a dial tone on that line)
After DSL comes back up Quickbooks also starts working again. (NO THEY ARE NOT RUNNING QUICKBOOKS ONLINE EDITION :))
Client calls letting us know what happened and wondering what we can do to prevent this in the future.
The second outage appears to confirm that when the internet goes down it breaks Quickbooks and causes slow performance on the LAN! :eek: Anybody have any clue as to what might be going on here? Be glad to provide log files to help troubleshoot if needed.