We have a customer who's transferring approximately 200 files nightly from an OS/390 2.10 guest to a RedHat Linux 7.2 at the 2.4.9-38 kernel level. The files vary in size but are generally always smaller than 600k. The FTP process fails 99% of the time after transferring anywhere from 20 to 150 of the files. We can recreate the problem on another Linux guest running the same version of RedHat. We can successfully transfer the files from the OS/390 system to other OS/390 systems as well as to Windows based PC platforms - all of which complete successfully. The only difference is the Linux guest is in the DMZ while the other S390 systems and the PC's we've tested to are in our Intranet.
When it fails the only message we see is from the OS/390 side which indicates the session has reset. Any ideas on how to determine what's going on when transferring to the Linux guest that may be causing the session to fail? Chuck Gowans USDA - Nat'l IT Center
