This sounds like a firewall problem. Could be that you are exhausting the number of open ports in your firewall. I assume that more concurrent FTP's run at night than during the day.
FTP uses three ports: the well known port to negotiate the control port, and then the control port to negotiate the data port. The messages suggest that a control port was opened successfully, but the open of the data port was blocked. Another issue we have seen is that some platforms cannot handle more than one concurrent FTP session. We use the scheduler to serialize FTP transmissions to those boxes. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of ??? ?? ??? Sent: Wednesday, February 10, 2010 7:39 AM To: [email protected] Subject: Re: FTP problems These are the type messages that we are seeing. 150 Opening ASCII mode data connection for DPT0119.DAT. 426 Connection closed; transfer aborted. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of McKown, John Sent: Wednesday, February 10, 2010 3:31 PM To: [email protected] Subject: Re: FTP problems > -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of ??? ?? ??? > Sent: Wednesday, February 10, 2010 2:24 AM > To: [email protected] > Subject: FTP problems > > Hi, > > Lately we've been having problems with ftp transfers from the > mainframe to windows ftp servers. > It usually happens during the night. When we rerun the job > during the day, everything works fine. > > Can anyone suggest a procedure or product that would help pin > point the problem. > > We are using z/OS v1.9. > The ftp servers are running Microsoft FTP service. > > Gadi What sort of problems are you having? We had a problem with an old Windows version where the file transferred properly, but the server did not send the proper response. In this case, I had to do a TCPIP trace of the entire ftp transaction. I then sent that to the Windows people (who, of course, said it was an IBM problem). They eventually just said to ftp to a different server and the problem just "disappeared". -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html לשימת לבך, בהתאם לנהלי החברה וזכויות החתימה בה, כל הצעה, התחייבות או מצג מטעם החברה, מחייבים מסמך נפרד וחתום על ידי מורשי החתימה של החברה, הנושא את לוגו החברה או שמה המודפס ובצירוף חותמת החברה. בהעדר מסמך כאמור (לרבות מסמך סרוק) המצורף להודעת דואר אלקטרוני זאת, אין לראות באמור בהודעה אלא משום טיוטה לדיון, ואין להסתמך עליה לביצוע פעולה עסקית או משפטית כלשהי. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
