I prepared test environment and I will try to show you step by step
This is just a simple example.
In Openvpn you can use dynamic or static pool IP addressing.
For add static pool, must stop OpenVPN Serwer first.
After stopping the server, you click “Static IP address pools”
then enter the adress pool name, network address and subnet mask
then start OpenVPN Server
After adding a static address pool you click on the pencil
then you can set the static address for the roadwarrior client
then as @bonnietwin wrote.
If you need it only once acces then you need to know what ip address the roadworrior client has.
or if you do not have WIO then go to System Logs–>Openvpn
Does anyone know how else to check the dynamic address of the roadwarrior client on IPFire?