OpenVPN Block outside DNS

Problem

Windows 10 leaks DNS searches towards all interfaces, and does not resolve correctly internal queries.

The option block-ouside-dns forces to use VPN DNS instead of DNS from adapter.

Client configuration

block-outside-dns

Server configuration

We can push the client option with the line: push "block-outside-dns"

References

• Push block-outside-dns (DNS leak/Windows 10)
• HOW TO FIX OPENVPN BLOCK-OUTSIDE-DNS PROBLEMS IN WINDOWS 10
• Windows 10 DNS Leak
• Step by Step Guide to Prevent VPN DNS Leak in Windows 10
• VPN works, but wrong DNS server is queried

Daniel Simao (talk) 14:01, 20 July 2018 (EDT)