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Posted to issues@commons.apache.org by "Yubao Liu (JIRA)" <ji...@apache.org> on 2018/04/12 11:23:00 UTC

[jira] [Updated] (VFS-660) expose workaround for connecting to FTP server from different subnets in PASV mode

     [ https://issues.apache.org/jira/browse/VFS-660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yubao Liu updated VFS-660:
--------------------------
    Description: 
[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, EPSV mode returns only server port
 * use PASV mode but overwrite the returned server IP with HostnameResolver

  was:
[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


> 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
>            Priority: Major
>             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, EPSV mode returns only server port
>  * use PASV mode but overwrite the returned server IP with HostnameResolver



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