Internet and vSphere access denied while ping is working

[ixxeL]

Hi guys,

My setup is the following :

1 ESXi host with 1 Debian 9 guest running OPENVPN server ==> both on 192.168.1.0/24 network.

I am connecting to my VPN with windows 10 client and get TUN ip address on 10.8.0.0/24 network.
For unknow reasons, I can ping local machines on 192.168.1.0/24 network from my windows 10 client but I can't access vSphere web client on 192.168.1.1.

Also, ping to 8.8.8.8 (or any external IP address) is working, ping to google.fr, linkedin.com... (or any DNS name) is working, but when I try to access website on firefox or chrome I get time out error.

here is my server conf file :

port 1194
proto udp
dev tun
sndbuf 0
rcvbuf 0
ca ca.crt
cert server.crt
key server.key
dh dh.pem
auth SHA512
tls-auth ta.key 0
topology subnet
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
push "dhcp-option DNS 212.27.40.240"
push "dhcp-option DNS 212.27.40.241"
push "dhcp-option DNS 192.168.1.254"
keepalive 10 120
cipher AES-256-CBC
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3
crl-verify crl.pem

I followed this tutorial to set up my configuration:
https://manjaro.site/install-openvpn-server-debian-9/

this tutorial worked for me before when I was under proxmox hypervisor instead of vSphere.
So, do you have any idea for my problem ? I can't understand why its not working...