We have two IronPort Web S370 proxy servers in a WCCP Transparent proxy cluster. We are experiencing problems with users who upload large video files where the upload will not complete. Some of the files are 2GB in size, but most are in the hundreds of megabytes size. Files of sizes less than a hundred meg seem to work just fine. Some users are using FTP proxy and some are using HTTP methods, such as YouSendIt.com. We have tried explict proxy settings with some improvment, but it varies by situation.
Is anyone else having problems with users uploading large files and having them fail? If so, any advice?