Need help with SecurityManager and errors thrown by JT400 class IFSFile

Hi all!



I am being forced by our security <multiple expletives deleted> to add
SecurityManager to an application running with the i5 classic (64 bit
JVM), Java 1.5.



This program uses IFSFiles.listFiles() to get a list of file in an IFS
folder.



SecurityManager blocked access to the folder which the program checks
for files.



java.security.AccessControlException: access denied
(java.io.FilePermission /127.0.0.1/ftp/yada..yada read)



I understand that one. I got around that with the permission



permission java.io.FilePermission "/127.0.0.1/ftp/", "read";



Now I am getting errors like this when IFSFile.listsFiles() and other
methods of IFSFile tries to access



2009-06-24 16:10:09,748 ERROR [Thread-0]: (ConvertIfsCheckLog.java:239)
- Error getting IFSFile object

com.ibm.as400.access.ExtendedIOException: Access to request was denied.

at java.lang.Throwable.<init>(Throwable.java:196)

at java.lang.Exception.<init>(Exception.java:41)

at java.io.IOException.<init>(IOException.java:40)

at
com.ibm.as400.access.ExtendedIOException.<init>(ExtendedIOException.java
:211)

at com.ibm.as400.access.IFSFile.listFiles(IFSFile.java:2215)

at com.ibm.as400.access.IFSFile.listFiles(IFSFile.java:2170)



Does anyone have suggestions how to get around this?



As an aside I am trying to

- protect the application from being hounded into nervous
breakdowns by penetration tests.



This is a server application. It listens to port 3111 for requests for
desktop clients. When it gets a valid request it responds otherwise it
logs the invalid connection attempt. When big brother is running a
random penetration test the server gets flooded with invalid. As a by
product it gets overloaded and misses check points.



My thought was to use security manager to

- allow it to listen only on port 3111

- allow it only to accept connections from a list of desktop
client names in the policy file



Is there a better way than using SecurityManager?



Thanks all

Bill Blalock



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