I have an issue at a new client that is causing their LOB app to fail. It happens intermittently and can be temporarily resolved by a client restart but will occur again after a few minutes and the LOB app will crash. The issue is that when pinging the SQL server by name the ping reply is from 127.0.53.53. Obviously this is a loopback address and non-workable. Any suggestions that could be causing this? As a temporary fix I have added the SQL server address and IP to the hosts file on each client, but this is not a long term workable solution. The SQL server has a manually assigned IP address and all the DNS information is entered correctly on the DNS server.