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From "Sebb (JIRA)" <>
Subject [jira] [Commented] (NET-508) Add support for FTP proxies
Date Wed, 05 Jun 2013 21:53:20 GMT


Sebb commented on NET-508:

bq. because FTP proxy handling is so complicated

As far as I can tell, it is not complicated in a specific case. Witness your Ant patch is
not very long.

What would be complicated is supporting all the possible variations, which is why I suggested
a template approach might be the best.
> Add support for FTP proxies
> ---------------------------
>                 Key: NET-508
>                 URL:
>             Project: Commons Net
>          Issue Type: Improvement
>          Components: FTP
>    Affects Versions: 3.2
>            Reporter: Arno Unkrig
> The COMMONS-NET FTP client supports 'FTP over HTTP', but not the other popular FTP proxy
schemes. The article
> describes some of them, but not very precisely an obviously a bit incorrect.
> I added proxy support for the ANT FTP task in
> (search for string "proxyServer"), but I believe that the feature should be implemented
in COMMONS-NET, not in the application, maybe like this:
> {code}
> connectToProxyAndLogin(server, port, userid, password, proxyServer, proxyPort, proxyUserid,
> {code}
> The proxy server that I (must) use is
> {noformat}
> 220 McAfee Web Gateway 7.2.0 build 13935
> {noformat}
> , and from experiments it supports the following authentication schemes:
> {noformat}
>  (1) USER pu PASS pp OPEN[:port] USER u                     PASS p
>  (2) USER pu PASS pp                          USER[:port] PASS p
>  (3) USER pu PASS pp SITE[:port] USER u                     PASS p
> {noformat}
> I don't know which FTP proxy servers support which of these flavors, but (2) appears
to be the most natural and robust to me.

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