How to make socket connection to a server where server is accessed only through another server in Java applets?

I have a server and client program. client is a java applet.

Previously I could run the server program in the server and the client successfully connected to the server program through the socket's proper port.

Now, I switched to a new server and I have problem with this server.

Direct connection (ssh) to this server (let say it is server1) is not possible.

I can connect a server2 (ssh), then connection to server1 is possible through the s开发者_如何学Goerver2 (ssh).

So now my java applet cannot connect to server1 and it gives connection error.

Do you have any opinions how my applet can connect to server1 now??

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If you want a server with a public access on a specific, you should concentrate on having have a public access and not try to connect every server to each other (via ssh).

A simple thing you could do for example is simple port forwarding from a public accessible server to your actual server (containing the java application). With this solution, you only have to change your client so it connects to the accessible server.

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If you can not connect to a spesific port on a server, its possibly related to firewall.

As I know, Linux firewall doesnt allows outer connections to ports, if they are not defined as "allowed", in iptables.

You should modify iptables to connect to proper port.
More on iptables.