I'm having an issue that I can't resolve and it is starting to drive me crazy

I had a OpenVPN server set up on a Raspberry Pi,everything worked great, but with all that hearthbleed talk, I decided to do a full re-install of my server.
Once I'm done, I try to connect to it with my windows computer with the GUI client, no problem so far, I can access any online content and whenever i check my external IP adress, it's the one from my server.
Then I try over my wifi network on my android phone, no problem once again.
BUT, when I try over cellular data, I can connect to the server, but no internet traffic doesn't seem to be working ...
Here are my settings :
My client configuration file :
Code: Select all
client
dev tun
proto udp
remote myserveradress 443
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client.crt
key client.key
comp-lzo
verb 3
My Server configuration file :
Code: Select all
port 443
proto udp
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh2048.pem
server 10.8.0.0 255.255.255.0
ifconfig-pool-persist ipp.txt
push "redirect-gateway def1 bypass-dhcp"
keepalive 10 120
comp-lzo
persist-key
persist-tun
status openvpn-status.log
verb 3
Thank you in advance
