I have a working OpenVPN Server on a Synology NAS. All works fine if I try to connect with Tunnelblick. However, if I use the OpenVPN client on a mobile device, I can't perform any http request. My browser hangs and the request times out. The strange thing is that the VPN connection is properly established, I can even ping my the NAS and see the open ports.
How can I troubleshot this?
EDIT: it looks like it's a problem with my mobile carrier. If I try the same scenario with the very same device under a WiFi network, all works fine. Crazy.