Kunlun Series Filtering Gateway by Topsec Network Security serves as the first line of defense against viruses, actively filtering and intercepting malware at network nodes. It offers virus outbreak alerts, detailed logs, and reports, along with unified upgrade services and multi-link protection. The gateway features a gateway-level virus detection scanning engine, application protocol recognition based on traffic content, and true file recognition based on file content to prevent virus evasion. Daily updates to the virus signature database enhance detection rates. It uses a high-performance multi-core domestic platform, ensuring reliable full-function virus and malware detection and filtering. The gateway supports IPv4 and IPv6 dual-stack network virus detection and filtering, as well as multi-link and multi-region virus protection. It includes visual operation and maintenance management with virus outbreak alerts, detailed logs, and visual reports for timely awareness of network virus threats and targeted responses. The gateway can be deployed at network boundaries or key nodes to block viruses from entering internal networks.