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Client-server security restrictions

daemon@ATHENA.MIT.EDU (Tom Whitehill)
Thu Feb 22 23:25:56 1996

Date: Wed, 21 Feb 1996 10:15:26 -0500
To: java-interest@java.sun.com
From: Tom Whitehill <tomw@softlinx.com>

Hi,

Here's a tidbit from the FAQ on Java Security (located at
http://java.sun.com/sfaq/#read)

1.What are applets prevented from doing? 

   In general, applets loaded over the net are prevented from reading and
writing files
   on the client file system, and from making network connections except to
the originating host. 

2.Can applets read or write files? 

   In Netscape Navigator 2.0, applets cannot read or write files at all. 

Does this mean that in a client-server architecture (in which the client is
an applet
running within the Netscape 2.0 browser) the server must either

1)  Reside on the 'originating host'? 

or

2)  Reside on a host other than the 'originating host' but reached via a proxy
    service which resides on the 'originating host'?  In this case the proxy
server
    would simply act as a stream redirector.

Thanks for any help,

Tom Whitehill
Senior Software Engineer
SoftLinx, Inc.
234 Littleton Road
Westford, MA 01886
508.392.0001 ext. 325
tomw@softlinx.com

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