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BR-AG
BR-AG
Visitor III
November 7, 2023
Solved

Windows DHCP configuration for ssl vpn

  • November 7, 2023
  • 2 replies
  • 1974 views

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/215644
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 ?

Best answer by BR-AG

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

2 replies

dbu
Staff
dbu
Staff
November 7, 2023

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
BR-AGAuthorAnswer
Visitor III
November 16, 2023

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

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