If port 8000 is banned, QQ login cannot be banned. Because QQ can use HTTP and HTTPS, that is, 80 and 443 ports to log in. Therefore, at present, a better method is to find out the addresses of Tencent-related login servers and create a target set. Internal users are prohibited from connecting to this target set. Although this method is tedious, it is an effective method at present. For details, please refer to the collection of QQ server addresses by peers on relevant network management websites. It may need to be updated frequently.
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