I'm trying to use the curl command line to encrypt the FTP control
connection to my zOS FTP server, but leave the data connection
unencrypted. My current attempt looks like:
        curl -k -v -T /tmp/src-filename.txt --ftp-ssl-control -u uid:pwd
'ftp://ftp.hostname.com/directory/dest-filename.txt'
The way I'm reading the verbose output, the TLS control connection appears
to be properly negotiated, but the connection is ultimately rejected with
the message: "421 Open rejected due to insufficient resources." If I run
the command without --ftp-ssl-control, my file is transferred correctly,
so my userid & password are unlikely to be the problem.

I believe the FTP server is assuming the data connection is to be
encrypted, and won't allow that because of site-restrictions. In the
verbose output, I notice that curl appears to be using "AUTH SSL" to begin
the negotiations of the encrypted control connection. According to my
read of the description of the AUTH_TLS extension in the zOS FTP docs (
http://publib.boulder.ibm.com/infocenter/zos/v1r9/index.jsp?topic=/com.ibm.zos.r9.halz001/extns.htm
) I'm guessing that the FTP server is inferring an encrypted data
connection from the "AUTH SSL" and I should be forcing curl to use "AUTH
TLS" instead... I think I want the command line equivalent of setting
"CURLOPT_FTPSSLAUTH=CURLFTPAUTH_TLS". Does that sound right? Is it
possible to set that option via command line?

Thanks for the info!
Bill
-----------------------------------------
This is a PRIVATE message. If you are not the intended recipient, please
delete without copying and kindly advise us by e-mail of the mistake in
delivery.
NOTE: Regardless of content, this e-mail shall not operate to bind CSC to
any order or other contract unless pursuant to explicit written agreement
or government initiative expressly permitting the use of e-mail for such
purpose.

-------------------------------------------------------------------
List admin: http://cool.haxx.se/list/listinfo/curl-users
FAQ: http://curl.haxx.se/docs/faq.html
Etiquette: http://curl.haxx.se/mail/etiquette.html
Received on 2010-05-13