Windows DHCP configuration for ssl vpn

[BR-AG]

Hello,

Can someone help me to configure dhcp server on windows server for ssl vpn clients. I have fortigate 100f with version 7.2.5 which I configured according to the instructions https://community.fortinet.com/t5/FortiGate/Technical-Tip-SSL-VPN-with-external-DHCP-Server/ta-p/215...
When configured for vlan everything is easy and works fine. For ssl vpn clients where there is no default gateway the configuration looks different. On wireshark you can see that when trying to connect vpn request to dhcp server is sent. However, the connection does not happen because the client does not receive an ip address. Do you know how the configuration should look like on the dhcp server side of the windows server ?

[dbu]

Hello @BR-AG ,

Have you specified this IP range on the Fortigate SSL VPN configuration ? 

Verify under VPN > SSL-VPN Settings > Tunnel Mode Client Settings > Specify > IP Ranges. 

You can troubleshoot further from the DHCP Server side by checking the logs:

Troubleshoot problems on the DHCP server | Microsoft Learn

[BR-AG · Accepted solution]

I didn't notice that the manual said to configure the loopback. Configuring the loopback interface took care of it.