> For the complete documentation index, see [llms.txt](https://docs.fusion.vectra.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fusion.vectra.ai/detection-models/library/informational/alltcpflags.md). # alltcpflags **Explanation** The alltcpflags security event is designed to trigger when all the TCP flags are set in a network packet. This can indicate a malicious attempt to evade detection by avoiding detection signatures. The event is triggered when a packet with all TCP flags set is captured by the Netography Fusion Portal. This NDM will only alert when you have a sample rate of 1. **What to Look For** When examining the results of the alltcpflags event, look for packets with all TCP flags set. This may indicate malicious activity, such as a network scan or an attempt to evade detection. It is important to analyze this event on both the network and endpoint to identify the root cause and take appropriate actions to prevent further activity. Make sure to investigate the source of the traffic and the ports being used to understand the full scope of the event. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.fusion.vectra.ai/detection-models/library/informational/alltcpflags.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.