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From "Yubao Liu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (VFS-660) expose workaround for connecting to FTP server from different subnets in PASV mode
Date Thu, 12 Apr 2018 11:09:00 GMT
Yubao Liu created VFS-660:
-----------------------------

             Summary: expose workaround for connecting to FTP server from different subnets
in PASV mode
                 Key: VFS-660
                 URL: https://issues.apache.org/jira/browse/VFS-660
             Project: Commons VFS
          Issue Type: Improvement
    Affects Versions: 2.2.1
            Reporter: Yubao Liu
             Fix For: 2.2.1


[https://github.com/apache/commons-vfs/pull/35]

 

In PASV mode, the FTP server returns its server IP (eg. pasv_address in vsftpd.conf),
 when clients are from different subnets through NAT, they expect different server IP.

This patch exposes the workaround in commons-ftp into commons-vfs:
 * use EPSV mode instead of PASV mode, PASV mode returns only server port
 * use PASV mode but overwrite the returned server IP with HostnameResolver



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