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43.99.39.33 has a moderate threat confidence level of 59%, originating from Hong Kong, Hong Kong, on the Alibaba US Technology Co., Ltd. network (45102). It has been observed across 15 sessions targeting HTTPS, HTTP, SMB, FTP, SSH and 1 other protocols, First observed on March 9, 2026, most recently active March 10, 2026.
Identifies HTTP requests targeting the web server root path ("/"), typically used for initial service discovery, host validation, or baseline content inspection prior to deeper enumeration.