OpenVPN Security Advisory: Dec 14, 2018
Action needed: Important update for OpenVPN Access Server

What is DNS?


Domain Name System, or DNS, is the system on the Internet that resolves names like to an IP address like on the Internet. IP addresses are the unique addresses of computer systems in networks, and the Internet is one big network. These addresses work like phone numbers. They are unique and allow communication between the different computers on the Internet. To expect humans to remember IP addresses for all the various websites they want to visit, is simply not practical. So we create DNS names like,,, on the Internet, and let a DNS server take care of translating names to IP addresses. It can also be used for shorter host names in an internal network to resolve a name like pc1 to a private IP address.

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