Topic on Project:Support desk

Mediawiki: 1.17
MySQL Server: 5.1.49
PHP5: 5.3.3
Apache2: 2.2.16

My file upload is slow, but it works. Everything else is fast. To upload a file (16KB) it loads at least 1 minute. But the Wiki Server is in the same network, and copying it directly to the server is very fast. I also tried to reinstall everything, for nothing =( Any ideas?
.. sorry for my bad english...

I found the problem: when I upload a file, it tries to connect to

http://commons.wikimedia.org/w/api.php?aisha1base36=j4xs0i3rn6unupzfn8bwcs2kyo54cfy&aiprop=timestamp%7Cuser%7Ccomment%7Curl%7Csize%7Csha1%7Cmetadata%7Cmime&list=allimages&format=json&action=query&redirects=true

But the server stays behind a proxy und is only accessible from the local network. Can I turn this connections off or can I set the http proxy for mediawiki?

See $wgHTTPProxy or, if you don't need external images, disable $wgForeignFileRepos or $wgUseInstantCommons.