Problem with FTP upload via FTP Proxy

[olaf.krause]

Wingate 6.1.4 Kaspersky AV Plugin 2

Problem:
Uploading a file failes since the FTP Client shows that the file was transfered (100%) but wingate is still uploading. (see this in gatekeeper tab + router LEDs). Behaviour seen with WSFTP and FileZilla and SmartFTP.
Note: The clients shows >20KB/s upload speed but the actual transferrate between wingate and FTP Server is <=10KB/s.

If the client is configured to retry it does a loop until the last allowed retry. After this the last upload might work but not always.

[olaf.krause]

I've had this problem also with all older versions. Are you able to reproduce it? If not which infos are missing?

[adrien]

Hi Olaf

We'll have to test this in the lab.

When you have KAV installed it will scan uploads, and dripfeed to the end server in the meantime. This means the upload is buffered in the WinGate machine until it has the whole file, then it is scanned, and uploaded to the server. Whilst it is being uploaded to WinGate, WinGate is sending 75% through to the server. So the speed of upload to WinGate would be 33% faster than the speed of the upload to the server. So your experience of over 100% faster is interesting.

By the time the client has uploaded all the file to WinGate, the server should have 75% of the file. The delay then occurs whilst WinGate scans the file, and uploads the remaining 25%.

If your FTP client gives up waiting on the response from the server (that it has received the whole file), and times out, then the upload would fail.

Does this happen more often with bigger files than smaller files? Do you know if there is anywhere in the FTP client that you can configure timeouts?

Adrien

[olaf.krause]

...So the speed of upload to WinGate would be 33% faster than the speed of the upload to the server. So your experience of over 100% faster is interesting.
...
If your FTP client gives up waiting on the response from the server (that it has received the whole file), and times out, then the upload would fail.

Does this happen more often with bigger files than smaller files? Do you know if there is anywhere in the FTP client that you can configure timeouts?

Adrien

Regarding speed: I again did a measurement, and you're right. I have now real transferrate of 100-160kbs and FTP showing 16-28KB/s. So If I take bot maximum rates I get 20&28KB/s what make around 30% to fast. Maybe when I first calculated the speed I took not max on both sides.

Yes always problems with bigger files >5MB. I will also have a look for timers in my FTP Client. I'm wondering that no other user has that problem - or do all have ultra high speed upload connections???

[olaf.krause]

Any update on this?

Meanwhile I found out that also HTTP downloads sometimes have problems. I now regularly have problems donwloading big files (>50MB) with Opera. What I see then is that Opera stops the first try and retries but in wingate (Gatekeeper) you see that the first try is still in progress (you see two downloads in progress of the same file) ... at the end all retries fails.

[olaf.krause]

Still have problems. For bigger files >50MB I cannot use the HTTP Proxy since all requests will timeout at the end. As a workaround I'm using the SOCKS5 Proxy (which works) but then I do not have any Virus scan I think (within wingate).

Will this be improved in the next Service Release?

THX

Olaf