What can I say ColinTaylor, but thank you for taking the time to answer all my questions and explain all this. It's very much appreciated. I tend to use the search bar for most things and I can see you regularly post on DNS related threads stretching back years, so thanks again for your valuable input in the last 24hrs. I now have a much better understanding of how my own network is functioning (I'm glad its doing what its supposed to be doing) and I will continue on the learning curve. Cheers