If still no luck, it asks the DNS server provided by your internet service provider (ISP). Security: Some DNS services help block malicious websites or phishing attempts. Surfshark’s DNS: Private and FreeSurfshark, known for its VPN services, offers a free public DNS designed with privacy in mind. Unlike many default ISP DNS services, Surfshark’s DNS doesn’t log or track your online activity. If you’re serious about your gadgets, online privacy, and speed, don’t overlook your DNS.