note 50939 added to features.file-upload

If you're having problems uploading large files but small files go through fine, here are some things to try: - In the HTML form, make sure you've set MAX_FILE_SIZE to an acceptable value. - In php.ini, be sure you've set the the upload_max_filesize and post_max_size to be large enough to handle your upload. - In your httpd.conf (if you're using apache), check that the LimitRequestBody directive isn't set too low (it's optional, so it may not be there at all). If those settings don't work, you can check your firewall configuration. When uploading large files, packets have to be split into fragments of varying size depending on your systems MTU (maximum transmission unit), which is typically 1500 bytes. Because some systems send the packets with the headers last (or the header packet may be received after some of the data packets), firewalls can't filter this traffic based on destination port and address. Many firewalls (including iptables) have to be configured to allow fragments separately from standard traffic. Unfortunately, it's an all-or-nothing thing in these cases, and exploits based on packet fragmentation have been a problem in the past (teardrop, boink, etc.). Note that ICMP may be used to notify the host (your server) of oncoming fragmentation, so you may need to allow ICMP traffic as well. The iptables rules for this are as follows: # allow all fragments -A INPUT -f -j ACCEPT # allow icmp traffic -A INPUT -p icmp -j ACCEPT On the bright side, this will also fix some issues with ssh and NFS =) ---- Manual Page -- http://www.php.net/manual/en/features.file-upload.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+50939 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+50939&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+50939&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+50939&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+50939&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+50939&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+50939&report=yes Search -- http://master.php.net/manage/user-notes.php