Description
This article describes that from the GUI, configuring a single DNS server IP is possible.
Scope
FortiGate.
Single DNS configuration while using the IPSEC wizard tool.
DNS configuration in existing IPSEC tunnel.
Solution
Edit the VPN tunnel from CLI.
config vpn ipsec phase1-interface
edit <vpn name>
set dns-mode manual
set ipv4-dns-server1 3.3.3.3
set ipv4-dns-server2 4.4.4.4
end
Dialup VPN client will get 3.3.3.3 as the primary and 4.4.4.4 as the secondary DNS server.