Protocols List -> QQ offline FTP

QQ offline FTP ports range, how to block QQ offline FTP in network?

QQ offline FTP
Support: WFilter zh.4.1, WFilter en.4.1, WFilter Free 1.0, WFilter ROS 1.0
  Author: Bruce ModifyTime: 2018-04-02 04:11:40  
      QQ offline file transfer. Your files will be relayed via QQ servers. This protocol can block offline files via QQ messenger.  

This protocol is official supported. You can install it in "System Settings"->"Protocols" of WFilter.


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"QQ offline FTP" uses TCP protocol for communication.

TCP traffic analysis

Ports Range

Dynamic ports, no fixed port found.

HTTP traffic analysis

HTTP traffic is found in QQ offline FTP's traffic.

It also uses a particular UserAgent(regular expression): ^QQClient.

How to block QQ offline FTP?

  • Setup a content filter(ie: WFilter), which can block QQ offline FTP via signature matching.

QQ offline FTP v1.0(2018-04-02 04:11:40)

‚óŹ Separated from QQ file transfer.