How to block uploading and outgoing files through the network

There are many ways to upload and send files through the network, such as:

A variety of file transfer methods, such as QQ files, Wechat files, FTP upload and so on.

All kinds of document transmission websites, network disks and file sharing sites. You can upload it directly in the browser.

The way attachments are sent by e-mail.

Therefore, to both open the network and block outbound, this is a professional function, need to have professional products can really do. In WFilter NGF, for example, to block uploads, you need to combine the two modules of "application filtering" (for clients) and "web page filtering" (based on URL library filtering, blocking network disks and file-sharing sites). The specific configuration is shown below:

1. Web page filtering blocks web disk sites

two。 Apply filtering to prohibit file transfer

3. Application filtering prevents email from being sent

4. Turn on filtering for suspected file uploads

In addition to the above file sending methods, there may also be some unknown transmission methods. It is recommended that you enable "prohibit suspected uploads of more than N bytes". Once it is detected that the uploaded data of each connection exceeds the limit, the suspected upload behavior is automatically blocked.

This intelligent filtering option for suspected documents is an effective supplement to web page filtering and application filtering. It can effectively prevent the upload behavior of various attachments and unknown protocols. For example, in the https page, uploading attachments can also be blocked.

To sum up, the management and control of outgoing and uploaded files requires the cooperation of multiple strategies to achieve the best results.