We're having an issue with "403 Forbidden" error while trying to upload big files(10-20Mb) split into chunks of 1-2Mb using plupload library.
This thing was tested on our dev server and everything was working OK.
On lunarpages we met this weird issue.
When we start upload process - several equal size chunks are uploaded one by one without any issues (this is just a loop sending ajax requests to the server)
Then suddenly when we attempt to send another chunk we receive response from server:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<p>You don't have permission to access /path_to_script/upload.php
on this server.</p>
<address>Apache/2.2.3 (CentOS) Server at ourdomain.com Port 80</address>
Sometimes we can upload 2 of 5 chunks
Sometimes for ex.: 6 of 17 chunks..
We know that this is not an issue with server settings like post_max_size or php run time limit.
Thanks in advance if anyone can advice the reason of this behaviour.