We have been developing a site for our client on their Internet host for over 6 months and it has been fine. We are approaching the go-live date and haven't touched it in a while and all of a sudden we have started received this error.

Unhandled Error
Error Details
File 
Error               A transport-level error has occurred when sending the request to the server.  (provider: TCP Provider, error: 0 - An established connection was aborted by the software in your host machine.)".

I have been in contact with the Internet host repeatedly and the only way to bring the site back is to restart the site/recycle the app-pool. Is this something odd on their end? Is it something with DotNetNuke? We've hosted DNN sites at many different hosts in the past and never ran into this one. I was told that they have a load balancer across 3 servers with over 1000 sites on them. Does this have something to do with it? Any advice would be appreciated!  Thanks

Yes, I did ask them to, but they keep insisting that it must be a DotNetNuke related error. I don't see how it could be, but I'm not a sys admin or anything with the knowledge to argue back. If anyone has advice as to what to have them look for, that would be much appreciated.