Doubts about Policy File Creation....please help me....

Question

I already reach a applet<-> servlet<->DB communication since my own pc i can access to it....indicating http://localhost:8088/name_file.html o http://localhost:8088/name_file.jsp in the browser.
Now according with:
http://developer.java.sun.com/developer/onlineTraining/Programming/BasicJava1/dba.html
I already created a file that contains:
grant {
permission java.net.SocketPermission "developer",
"resolve";
permission java.net.SocketPermission
"172.21.2.195:1521", "connect,resolve";
I named it like:
DbaApplPol.policy
Now....is correct it?....ie, the file have to be saved with extension ".policy"?
Also, how can i specify or indicate in the browser that the file *.html o *.jsp uses the "file DbaApplPol.policy"?, ie, what additional thing i have to place together with:
http://localhost:8088/name_file.html o http://localhost:8088/name_file.jsp in the browser.
On other hand.....doing it...any other different pc (including the mine), could to have access to my applet<-> servlet<->DB program?
Thanks in advance...
Mary

Answer 1

Thanks by answering to me....i really appreciate it....thanks...
Well....i already did the change in 1 and 2....
I'm using Tomcat 4.0.3, Windows 2000, jdk 1.3
1) I placed dbaapplpol.policy in:
C:\Jakarta-Tomcat-4.0.3\conf\DbaApplPol.policy
2) And i modified the java.security file in the following directory:
C:\Program Files\Java\j2re1.3\lib\security\java.security
with the following:
policy.url.1=file:${java.home}/lib/security/java.policy
policy.url.2=file:${user.home}/.java.policy
policy.url.3=http://172.21.2.195:8088/DbaApplPol.policy
Could you tell me if i have to do something more...Do i have to restart my computer? or something like that, because i obtain the following runtime exception:
java.security.AccessControlException: access denied (java.net.SocketPermission localhost:8088 connect,resolve)
     at java.security.AccessControlContext.checkPermission(Unknown Source)
     at java.security.AccessController.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkConnect(Unknown Source)
     at sun.plugin.net.protocol.http.HttpURLConnection.checkPermission(Unknown Source)
     at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
     at j13_a.make_servlet_connection(j13_a.java:129)
     at j13_a.Llenado_Valores_Region(j13_a.java:353)
     at j13_a.init(j13_a.java:99)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Any suggestion?....
Thanks...
Mary