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https://issues.apache.org/jira/browse/DERBY-6438?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13853946#comment-13853946
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Rick Hillegas commented on DERBY-6438:
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Thanks, Knut. These changes look good to me. +1
> Explicitly grant SocketPermission "listen" in default server policy
> -------------------------------------------------------------------
>
> Key: DERBY-6438
> URL: https://issues.apache.org/jira/browse/DERBY-6438
> Project: Derby
> Issue Type: Improvement
> Components: Network Server
> Affects Versions: 10.11.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Attachments: d6438-1a.diff
>
>
> The network server needs SocketPermission "listen" on the port that it
> listens to, but this permission is not granted by the basic server policy
> that's installed by default. This doesn't cause any problems in most cases,
> since the JVM's default policy grants all code bases SocketPermission
> "listen" on a range of ports, and Derby's network server port is within that
> range.
> Still, the network server should not rely on this fact. It is possible to run
> the network server on any port, not only those ports that happen be in the
> range that's given carte blanche by the platform's default policy. The
> network server will however not be able to run on those ports with the basic
> policy currently, only with a custom policy or with the security manager
> disabled.
> The default policy should make this permission explicit.
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