--- title: From Flood to Focus: Finding Signal in an “Overflow... description: A security investigation at Cisco Live EMEA Amsterdam shows how a burst of IPS overflow alerts was triaged using Cisco XDR, Splunk, Cisco Secure Firewall, and... canonical: https://daily.dev/posts/from-flood-to-focus-finding-signal-in-an-overflow-attempt-alert-storm-nwu2risx8 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: From Flood to Focus: Finding Signal in an “Overflow Attempt” Alert Storm | daily.dev og:description: A security investigation at Cisco Live EMEA Amsterdam shows how a burst of IPS overflow alerts was triaged using Cisco XDR, Splunk, Cisco Secure Firewall, and... og:url: https://daily.dev/posts/from-flood-to-focus-finding-signal-in-an-overflow-attempt-alert-storm-nwu2risx8 og:image: https://api.daily.dev/og/posts/NwU2RiSX8.png og:image:alt: From Flood to Focus: Finding Signal in an “Overflow Attempt” Alert Storm og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # From Flood to Focus: Finding Signal in an “Overflow Attempt” Alert Storm **[Cisco](https://daily.dev/sources/cisco)** · 7 min read · 0 upvotes · 0 comments ## Summary A security investigation at Cisco Live EMEA Amsterdam shows how a burst of IPS overflow alerts was triaged using Cisco XDR, Splunk, Cisco Secure Firewall, and Endace Zeek telemetry. Six clustered incidents were validated as false positives by correlating IPS sensor posture (SPAN/passive, detection-mode), HTTP metadata (URIs, user agents), and IMAP connection context. The findings were converted into targeted suppression rules that collapsed 17 additional similar incidents and hundreds of alerts. A repeatable five-step checklist is provided for handling future IPS alert storms. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [From Firehoses to Flutes – Mastering the Art of Drinking Our OwnChampagne](https://daily.dev/posts/from-firehoses-to-flutes-mastering-the-art-of-drinking-our-ownchampagne-zqgwrmih2) · Cisco · 0 upvotes · 0 comments - [What Working the Cisco Live SOC Taught Me About AI, Detection, and Response](https://daily.dev/posts/what-working-the-cisco-live-soc-taught-me-about-ai-detection-and-response-ivw98ssq2) · Cisco · 0 upvotes · 0 comments - [Continuous Improvement at Black Hat Europe: Listen to Your Analysts\! \(They Know What They Need\)](https://daily.dev/posts/continuous-improvement-at-black-hat-europe-listen-to-your-analysts-they-know-what-they-need--ufxpgjstb) · Cisco · 0 upvotes · 0 comments --- Tags: [#security](https://daily.dev/tags/security), [#logging](https://daily.dev/tags/logging) [View this post on daily.dev](https://daily.dev/posts/from-flood-to-focus-finding-signal-in-an-overflow-attempt-alert-storm-nwu2risx8) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"From Flood to Focus: Finding Signal in an “Overflow Attempt” Alert Storm","url":"https://daily.dev/posts/from-flood-to-focus-finding-signal-in-an-overflow-attempt-alert-storm-nwu2risx8","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/from-flood-to-focus-finding-signal-in-an-overflow-attempt-alert-storm-nwu2risx8"},"datePublished":"2026-03-09T12:03:22.815Z","dateModified":"2026-03-09T12:03:46.932Z","description":"A security investigation at Cisco Live EMEA Amsterdam shows how a burst of IPS overflow alerts was triaged using Cisco XDR, Splunk, Cisco Secure Firewall, and...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5957d5a903ee9f0af4c35a37ecc509ac?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5957d5a903ee9f0af4c35a37ecc509ac?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Cisco","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Cisco","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/68b8a8be17184235a5067d7c84162f77","url":"https://daily.dev/sources/cisco"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/from-flood-to-focus-finding-signal-in-an-overflow-attempt-alert-storm-nwu2risx8","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,logging","timeRequired":"PT7M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Cisco","item":"https://daily.dev/sources/cisco"},{"@type":"ListItem","position":3,"name":"From Flood to Focus: Finding Signal in an “Overflow Attempt” Alert Storm"}]} ```