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Apache Geronimo v2.1 is a JEE5 Certified server, downloads are provided for both Windows and Unix (including Linux, Mac OS X) operating systems. In addition to the platform specific downloads, Geronimo is available in three main distributions which are the Java EE 5 Certified (Big-G), Little-G and Geronimo Framework. As suggested by the name, only the first one has full support of all the features and funcitions functions in the JEE 5 specificacion specification and has passed SUN's JEE5 Certification Test Suite (CTS).
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<geronimo_home>/var/security
Others ...
Changing the default port numbers
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