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Java Forum / General / February 2007Limiting number of ports in VM to a range
Hi there, Trying to setup a vm server which accepts incoming connections. Is there a way of limiting the range of clients ports used by the vm during the connection creation with the connecting clients? I've looked at SocketPermissions, it looks like what I want...but not 100% sure. > Trying to setup a vm server which accepts incoming connections. Is > there a way of limiting the range of clients ports used by the vm > during the connection creation with the connecting clients? No, you need to accept all incoming connections, but you can close the ones you don't like based (for example) on Socket.getPort(). I wonder however what added value this has, considering the complexity it adds to the client. The only thing similar to what you are asking is to bind your ServerSocket to a specific local address, which lets you restrict what network your clients can connect from. /gordon  Signature[ don't email me support questions or followups ] g o r d o n + n e w s @ b a l d e r 1 3 . s e Sorry, I really meant the socket created via the accept() of the connection from the client application. So the socket on the same vm running the serversocket. > > Trying to setup a vm server which accepts incoming connections. Is > > there a way of limiting the range of clients ports used by the vm [quoted text clipped - 14 lines] > [ don't email me support questions or followups ] > g o r d o n + n e w s @ b a l d e r 1 3 . s e > Sorry, I really meant the socket created via the accept() of the > connection from the client application. So the socket on the same vm > running the serversocket. Every Socket returned by ServerSocket.accept() uses the *same* local port as the ServerSocket it came from. Maybe you could try to describe what problem you're trying to solve, instead of how you hope to solve it. /gordon Signature[ don't email me support questions or followups ] g o r d o n + n e w s @ b a l d e r 1 3 . s e Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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