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Pro Manual DNS server addresses available
Most other VPN providers leave you on your own to figure out DNS Servers to use and leak your DNS if you connect to their VPN service via the router. They don't give you DNS service, most often they will simply suggest using Google DNS or some other public DNS service which tracks and logs your DNS resolution defeating the point of using a VPN service. Some VPN providers have proprietary apps/firmware for a limited selection of last generation routers or older. Nord gives you two DNS servers you can manually set in your Router WAN DNS settings to ensure your connection is secure and is not being read by your ISP or a public DNS service. This is great for when you want to use stock firmware or can't use custom firmware like DD-WRT, Tomato, Open-WRT etc.
https://support.nordvpn.com/#/Other/1047409702/What-are-your-DNS-server-addresses.htm