FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
nverma
Staff
Staff
Article Id 212362
Description This article describes that custom DNS servers are not supported with L2TP tunnels.
Scope FortiGate.
Solution

- Custom DNS servers are not supported with L2TP tunnels. Users connected via L2TP will always retrieve FortiGate system DNS servers (under # config sys dns)


- Users can add the internal DNS server in the global system DNS options (Network -> DNS).

However, FortiGate will use that DNS server to resolve all DNS queries coming from all users, not only L2TP.

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