Im using a vb.net console app that has been working for many years now. However, since the 12th October 2019 - uploading a normal fUll size file to a 3rd party has suddenly stopped working.
I have checked the 3rd party, and our ISP, whom both report nothing their side has changed.
I can run the app that uses 5.7 version of the WinscpDLL and the latest 5.16 version, locally, and it sends a full file, however, server side in our data centre.. it fails to upload full files (a file with more than 19 lines of data)
I can connect via the winscp Client GUI and it sends as normal, but via the DLL. does not send..
I have tried raw settings and config settings sendbuf=0, have tried different versions of the client and dll, but does not work server side.. again have checked all configs server side for ourselves and the 3rd party. but still the DLL does not send full files, as it detects timeouts.
I have tried so far:
- raw settings and config settings in the VB.net code to sendbuf=0
- different timeouts
- and different servers.
App is run from main adminstrator account and NOT an IIS Web user account.
I am at a loss as to what it could be, hopefully someone on here has experienced the same issues.
Windows 2008 Datacentre using a vb.net app via the administrator account on a scheduled task.
I have included the latest debug and session logs.
Any help greatly appreciated.