Uploading and downloading files through firewalls

I assume WebExplorer Server would use standard http/https to upload and download files. If not, what is the protocol WES used to upload or download files? In which port?

Yes, WebExplorer Server uses http download/upload as all other WebExplorer products. By default upload/download is managed internally but you have the ability to choose your favorite upload component from SA-FileUp, AspUpload, AspSmartUpload(free)