Hi Daniel,
       This is what I get from curl. Just want to mention that I have a nat
box in the middle between my client and server that does translate my
address. I see that my client is rejecting the connection from the server.

client1(~)#curl -g -P - ftp://<user>:<somepassword>@[64:ff9b::1414:1496]/1K
-v
* About to connect() to 64:ff9b::1414:1496 port 21 (#0)
* Trying 64:ff9b::1414:1496...
* connected
* Connected to 64:ff9b::1414:1496 (64:ff9b::1414:1496) port 21 (#0)
< 220 (vsFTPd 3.0.2)
> USER <someuser>
< 331 Please specify the password.
> PASS <somepassword>
< 230 Login successful.
> PWD
< 257 "/<user>"
* Entry path is '/<user>'
> EPRT |2|2001::a|40570|
< 200 PORT command successful. Consider using PASV.
* Connect data stream actively
> TYPE I
< 200 Switching to Binary mode.
> SIZE 1K
< 213 1024
> RETR 1K
< 425 Failed to establish connection.
* RETR response: 425
* Remembering we are in dir ""
* Connection #0 to host 64:ff9b::1414:1496 left intact
curl: (19) RETR response: 425
> QUIT
< 221 Goodbye.
* Closing connection #0

Thanks,
Michael

On Thu, Aug 22, 2013 at 2:15 PM, Daniel Stenberg <daniel_at_haxx.se> wrote:

> On Wed, 21 Aug 2013, Michael Chan wrote:
>
> I'm trying to use curl to do active ftp for ipv6, but when I try doing
>> so, I get a RETR 425 message. I did a packet capture and saw that when the
>> server was trying to initiate a connect to the client, the client will send
>> an ICMPv6 type=1 code=1(destination unreachable, unreachable prohibited) to
>> the server. How can I make curl do active ftp for ipv6?
>>
>
> "curl -P - ftp://example.com/"
>
> Please use -v and show us the output so that we can see what fails (edit
> out sensitive info). I suspect your problem is not with curl but with your
> network setup/stack something...
>
> --
>
> / daniel.haxx.se
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Received on 2013-08-23