Credits to Joe McCray and his Defcon 18 talk
1. Use dig command
Look for multiple addresses resolving to one domain name.
2. Sites like netcraft.com can be used to check for a ip details. If things like F5 BigIP appear, most probably the host is load balanced.
3. Firefox Live HTTP Headers Add-on can be used to notice change
Security flaw in iOS 5.0.1 gives...
Yesterday, 10:29 PM in Mobile Security