Socket - Security

[SAM KUMAR]

Hi,
I am having a Server (Java ServerSocket) which listens on a particular port. This server is used for internal communication between different application and runs on a Web Server (Internet site which listens on port 80 and 443). I would like to know:
- Is anybody from outsite world can access my server application (not the web applicaiton)?
- If yes, then I don't want to allow outside world to access my server, it should accessible within the network. How can I achieve this.
- If NO, what is the reason?
I will appreciate for any informaition/link etc related to secutity precations with TCP socket based server running on a internet site.
Thanks.
SK

[SAM KUMAR]

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