dhclient can't work for my vpn ?

Hello,

I follow each of this tutoriel for install and connect softether client to vpn server host on vpn gate :

https://medium.com/@anuradha.15/install ... a405a0ae2c

but after many try, it always happen trouble when i set dhclient for my adapater... none ipv4 assigned.

i have try to change server,cut my firewall router,foward port tcp then udp, nothing.

However i can ping this server, and the vpn client is connect on server :

https://zupimages.net/viewer.php?id=20/18/xq96.png
https://zupimages.net/viewer.php?id=20/18/ivs4.png

Maybe a problem when i describe virtual hub?
For, exemple with the server 5.181.235.122 i had set for virtual hub "vpn326279540.opengw.net"

Thank you !
Zenvice