I've got a server with two network cards. The first one is configured with an internal IP and everything works just fine. The second one is configured with an external IP and is causing me some trouble: if I try and reach that address from inside the network everything is fine, if I try and reach that address from outside the network there's no way I can access the service on that server.
A traceroute from outside the network stops when reaching the gateway of the second network card. There must be something wrong either in the server configuration or in the gateway one, but I only have access to the server (and the gateway should be fine): what can I do to make sure that my configuration is correct?
Thank you, I'll provide any further information that can help you help me.