I was mistaken when I said that get and put were working. I have run
a number of tests and have been focused on the ls problem for some time.
When there is a firewall Get, put and ls all work when using the command
line ftp tool. None of them work when I use the FTP object.
I really don't understand what is happening with passive mode. I understand
the words, but not in the ftp context. Are the ports standard when using
the
passive mode?
In C an Rbind is used to establish the inbound connection, is there anything
I
can do to mimic that function? I got that info from an article in the
Information
Center - "Using AS/400 client SOCKS support to communicate outside a
firewall.
Thanks again,
Dick Bennion
> -----Original Message-----
> From: Dave Wall [SMTP:dawall@us.ibm.com]
> Sent: Tuesday, January 09, 2001 1:09 PM
> To: JAVA400-L@midrange.com
> Subject: Re: JTOPEN FTP Through a Firewall question
>
>
> The FTP classes uses passive mode when listing files on the server.
> Passive mode means a port other than the default FTP port is used to
> exchange data. Is it possible the second port is not open through the
> firewall? I had some confidence that this was it until I realized put
> also
> uses passive mode. Why would put work when list doesn't? Could be the
> ftp
> server is set up to handle get/put via passive mode, but not list?
>
> David Wall
> AS/400 Toolbox for Java
>
>
> "Bennion, Dick" <Dick_Bennion@AFCC.com>@midrange.com on 01/09/2001
> 11:52:33
> AM
>
> Please respond to JAVA400-L@midrange.com
>
> Sent by: owner-java400-l@midrange.com
>
>
> To: "'JAVA400-L@midrange.com'" <JAVA400-L@midrange.com>
> cc:
> Subject: JTOPEN FTP Through a Firewall question
>
>
>
> I am using the jtopen version of the toolkit and I am attempting to
> communicate with a number of sites that are outside our firewall. I am
> able
> to get and put files, but I am having a problem getting a listing of the
> files in the current working directory. I am using the FTP class.
>
> If I am accessing the server directory without going through the firewall
> everything goes perfectly.
>
> When I attempt ls through the firewall the list of files returned is
> always
> empty. The message returned is "226 Listing completed."
>
> I found some documentation that talks about using Rbind() from the client
> to
> establish an inbound connection.
>
> What should I do to be able to get a list of the files in a directory on
> the
> server? All help would be much appreciated.
>
>
>
>
> > Dick Bennion
>
>
>
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