Support specifying a range of passive ports
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Key: FTPSERVER-53
URL: http://issues.apache.org/jira/browse/FTPSERVER-53
Project: FtpServer
Issue Type: Improvement
Reporter: Clinton Foster
The config.data-connection.passive.ports configuration parameter allows
specifying either 0 (any available port) or a comma-separated list of ports.
But passive mode is increasingly becoming the standard these days, and it isn't
practical to specify all the ports needed for a reasonable number of
simultaneous passive connections in a comma-separated list. I believe most FTP
server administrators expect to be able to specify a range of ports.
It would probably be sufficient to assume if the configuration string contains
a dash, it specifies a range instead of a list. Even better would be to allow a
comma-separated list of multiple ranges and/or individual ports, e.g.
1025-2025,5055-6000,2323. But initially I think it would be sufficient to
support only a single range. In other words, if the value contains a dash
anywhere in the string, assume it is a range of ports. (If multiple ranges are
needed, support for this could easily be added later without breaking existing
configurations.)
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