We have a Windows 2000 Server box acting as an ftp server. Until roughly two weeks ago, users were able to connect and upload and download all the files they needed to do their jobs. However, now, users internal to the network are able to connect and transfer files, but people outside the network cannot transfer .exe or .mdb files. I've tried through a web browser, and using an ftp program such as WS_FTP. I can authenticate with the server, and download .txt files. Our firewall team has already looked at the firewalls, and they have said that there is nothing in the logs and that the firewall does not discriminate based on file extensions.
Things I've already tried :
Downloading to the server using WS_FTP : I can download .exe files from public sites on the internet to the server
Changing the file extension : I have tried changing the extension of an .mdb file and downloading it from the server, but had the same problem.
I'm out of ideas at this point. Does anyone have any suggestions?