Using HideAway with DNS leak protection ensures that your ISP's DNS server are not used, but instead those by HideAway are used instead. Some ISP's are now using a technology called 'Transparent DNS proxy'. Using this technology, they will intercept all DNS lookup requests (TCP/UDP port 53) and transparently proxy the results.
This effectively forces you to use their DNS service for all DNS lookups. Stay anonymous, private and secure when browsing the internet with the worlds fastest, most flexible VPN.