{
    "api_version": "1",
    "kind": "dse_post",
    "self": "https://update.dsesecurity.com/api/v1/posts/wireshark-checksum-offload-capture-point/",
    "item": {
        "id": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/",
        "slug": "wireshark-checksum-offload-capture-point",
        "url": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/",
        "alternate_urls": {
            "markdown": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point.md",
            "json": "https://update.dsesecurity.com/api/v1/posts/wireshark-checksum-offload-capture-point/"
        },
        "title": "Check capture offloading before diagnosing checksum corruption",
        "summary": "Determine where packets were captured before treating invalid outbound checksums as a network fault.",
        "format": {
            "slug": "guide",
            "name": "Guide"
        },
        "priority": {
            "slug": "info",
            "name": "Information"
        },
        "featured": false,
        "image": {
            "theme": "network-infrastructure",
            "label": "Networks & infrastructure",
            "alt": "Resilient network core with engineered blue and gold data paths.",
            "card_url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-card.webp?v=1.8.20",
            "hero_url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-hero.webp?v=1.8.20",
            "social_url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-social-v2.jpg?v=1.8.20",
            "width": 2400,
            "height": 1350
        },
        "topics": [
            {
                "slug": "it",
                "name": "IT",
                "url": "https://update.dsesecurity.com/topic/it/"
            },
            {
                "slug": "networks-infrastructure",
                "name": "Networks & Infrastructure",
                "url": "https://update.dsesecurity.com/topic/networks-infrastructure/"
            }
        ],
        "author": {
            "name": "DSE Security Editorial Team",
            "url": "https://update.dsesecurity.com/#editorial-team",
            "type": "Organization"
        },
        "publisher": {
            "name": "Detection Systems & Engineering",
            "url": "https://dsesecurity.com/"
        },
        "published_at": "2026-10-15T00:43:38+00:00",
        "modified_at": "2026-10-15T00:44:33+00:00",
        "reviewed_on": "2026-10-14",
        "reading_minutes": 2,
        "word_count": 247,
        "potentially_affected": "Use this when investigating checksum warnings in a host capture. Record traffic direction, capture location, adapter settings, and Wireshark validation preferences before drawing a conclusion.",
        "dse_recommendation": "DSE recommends preserving the original capture and comparing the same approved flow from another suitable observation point.",
        "primary_source": {
            "name": "Wireshark — User’s Guide, Checksums",
            "url": "https://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html",
            "published_on": null,
            "authority": "www.wireshark.org"
        },
        "publishing_principles": "https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/",
        "usage_info": "https://update.dsesecurity.com/usage/",
        "copyright_notice": "Copyright © 2026 Detection Systems & Engineering. All rights reserved.",
        "content_html": "<p>Determine where packets were captured before treating invalid outbound checksums as a network fault.</p>\n<h2>Source facts</h2>\n<p>Wireshark explains that a capture can see locally generated outgoing packets before network hardware finishes checksum offloading. Such packets can appear to have invalid checksums in the capture even though the transmitted packets are valid. This explanation applies to packets generated at the capture point, not automatically to received traffic. The guide also notes that enabled checksum validation can affect packet reassembly when a checksum is considered invalid.</p>\n<p>Source: <a href=\"https://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html\">Wireshark — User’s Guide, Checksums</a>.</p>\n<h2>Applicability</h2>\n<p>Use this when investigating checksum warnings in a host capture. Record traffic direction, capture location, adapter settings, and Wireshark validation preferences before drawing a conclusion.</p>\n<h2>DSE recommendation</h2>\n<p>DSE recommends preserving the original capture and comparing the same approved flow from another suitable observation point. Correlate the warning with actual connection symptoms, retransmissions, and application results. Distinguish a capture artifact from a measured on-wire error before replacing equipment or changing drivers. Keep any temporary offload change within a controlled test and restore the accepted configuration afterward. Limit captures to the authorized diagnostic scope and handle packet contents according to the organization’s data policy.</p>\n<h2>Verification</h2>\n<p>Compare outbound and received packets and the corresponding peer-side observation where available. Record whether the warning persists beyond the originating host. Retain the capture method and relevant preferences with the finding so another reviewer can understand why a warning was accepted or escalated.</p>\n<h2>Official reference</h2>\n<p><a href=\"https://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html\">Wireshark — User’s Guide, Checksums</a>. Reviewed October 14, 2026.</p>",
        "content_text": "Determine where packets were captured before treating invalid outbound checksums as a network fault.\nSource facts\nWireshark explains that a capture can see locally generated outgoing packets before network hardware finishes checksum offloading. Such packets can appear to have invalid checksums in the capture even though the transmitted packets are valid. This explanation applies to packets generated at the capture point, not automatically to received traffic. The guide also notes that enabled checksum validation can affect packet reassembly when a checksum is considered invalid.\nSource: Wireshark — User’s Guide, Checksums.\nApplicability\nUse this when investigating checksum warnings in a host capture. Record traffic direction, capture location, adapter settings, and Wireshark validation preferences before drawing a conclusion.\nDSE recommendation\nDSE recommends preserving the original capture and comparing the same approved flow from another suitable observation point. Correlate the warning with actual connection symptoms, retransmissions, and application results. Distinguish a capture artifact from a measured on-wire error before replacing equipment or changing drivers. Keep any temporary offload change within a controlled test and restore the accepted configuration afterward. Limit captures to the authorized diagnostic scope and handle packet contents according to the organization’s data policy.\nVerification\nCompare outbound and received packets and the corresponding peer-side observation where available. Record whether the warning persists beyond the originating host. Retain the capture method and relevant preferences with the finding so another reviewer can understand why a warning was accepted or escalated.\nOfficial reference\nWireshark — User’s Guide, Checksums. Reviewed October 14, 2026.",
        "content_markdown": "Determine where packets were captured before treating invalid outbound checksums as a network fault.\n\n## Source facts\n\nWireshark explains that a capture can see locally generated outgoing packets before network hardware finishes checksum offloading. Such packets can appear to have invalid checksums in the capture even though the transmitted packets are valid. This explanation applies to packets generated at the capture point, not automatically to received traffic. The guide also notes that enabled checksum validation can affect packet reassembly when a checksum is considered invalid.\n\nSource: [Wireshark — User’s Guide, Checksums](https://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html).\n\n## Applicability\n\nUse this when investigating checksum warnings in a host capture. Record traffic direction, capture location, adapter settings, and Wireshark validation preferences before drawing a conclusion.\n\n## DSE recommendation\n\nDSE recommends preserving the original capture and comparing the same approved flow from another suitable observation point. Correlate the warning with actual connection symptoms, retransmissions, and application results. Distinguish a capture artifact from a measured on-wire error before replacing equipment or changing drivers. Keep any temporary offload change within a controlled test and restore the accepted configuration afterward. Limit captures to the authorized diagnostic scope and handle packet contents according to the organization’s data policy.\n\n## Verification\n\nCompare outbound and received packets and the corresponding peer-side observation where available. Record whether the warning persists beyond the originating host. Retain the capture method and relevant preferences with the finding so another reviewer can understand why a warning was accepted or escalated.\n\n## Official reference\n\n[Wireshark — User’s Guide, Checksums](https://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html). Reviewed October 14, 2026."
    },
    "json_ld": {
        "@context": "https://schema.org",
        "@graph": [
            {
                "@type": "Organization",
                "@id": "https://dsesecurity.com/#organization",
                "name": "Detection Systems & Engineering",
                "alternateName": "DSE Security",
                "url": "https://dsesecurity.com/",
                "logo": {
                    "@type": "ImageObject",
                    "url": "https://update.dsesecurity.com/assets/dse-logo-20260812.png?v=1.8.20"
                }
            },
            {
                "@type": "Organization",
                "@id": "https://update.dsesecurity.com/#editorial-team",
                "name": "DSE Security Editorial Team",
                "url": "https://update.dsesecurity.com/",
                "parentOrganization": {
                    "@id": "https://dsesecurity.com/#organization"
                }
            },
            {
                "@type": "WebSite",
                "@id": "https://update.dsesecurity.com/#website",
                "name": "DSE Updates",
                "alternateName": "DSE Security Knowledge Hub",
                "url": "https://update.dsesecurity.com/",
                "inLanguage": "en-US",
                "publisher": {
                    "@id": "https://dsesecurity.com/#organization"
                },
                "potentialAction": {
                    "@type": "SearchAction",
                    "target": {
                        "@type": "EntryPoint",
                        "urlTemplate": "https://update.dsesecurity.com/?q={search_term_string}"
                    },
                    "query-input": "required name=search_term_string"
                }
            },
            {
                "@type": "WebPage",
                "@id": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/",
                "url": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/",
                "isPartOf": {
                    "@id": "https://update.dsesecurity.com/#website"
                },
                "lastReviewed": "2026-10-14"
            },
            {
                "@type": "BreadcrumbList",
                "@id": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/#breadcrumbs",
                "itemListElement": [
                    {
                        "@type": "ListItem",
                        "position": 1,
                        "name": "DSE Updates",
                        "item": "https://update.dsesecurity.com/"
                    },
                    {
                        "@type": "ListItem",
                        "position": 2,
                        "name": "Check capture offloading before diagnosing checksum corruption",
                        "item": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/"
                    }
                ]
            },
            {
                "@type": [
                    "Article",
                    "TechArticle"
                ],
                "@id": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/#article",
                "identifier": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/",
                "url": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/",
                "headline": "Check capture offloading before diagnosing checksum corruption",
                "description": "Determine where packets were captured before treating invalid outbound checksums as a network fault.",
                "abstract": "Determine where packets were captured before treating invalid outbound checksums as a network fault.",
                "articleBody": "Determine where packets were captured before treating invalid outbound checksums as a network fault.\nSource facts\nWireshark explains that a capture can see locally generated outgoing packets before network hardware finishes checksum offloading. Such packets can appear to have invalid checksums in the capture even though the transmitted packets are valid. This explanation applies to packets generated at the capture point, not automatically to received traffic. The guide also notes that enabled checksum validation can affect packet reassembly when a checksum is considered invalid.\nSource: Wireshark — User’s Guide, Checksums.\nApplicability\nUse this when investigating checksum warnings in a host capture. Record traffic direction, capture location, adapter settings, and Wireshark validation preferences before drawing a conclusion.\nDSE recommendation\nDSE recommends preserving the original capture and comparing the same approved flow from another suitable observation point. Correlate the warning with actual connection symptoms, retransmissions, and application results. Distinguish a capture artifact from a measured on-wire error before replacing equipment or changing drivers. Keep any temporary offload change within a controlled test and restore the accepted configuration afterward. Limit captures to the authorized diagnostic scope and handle packet contents according to the organization’s data policy.\nVerification\nCompare outbound and received packets and the corresponding peer-side observation where available. Record whether the warning persists beyond the originating host. Retain the capture method and relevant preferences with the finding so another reviewer can understand why a warning was accepted or escalated.\nOfficial reference\nWireshark — User’s Guide, Checksums. Reviewed October 14, 2026.",
                "datePublished": "2026-10-15T00:43:38+00:00",
                "dateModified": "2026-10-15T00:44:33+00:00",
                "mainEntityOfPage": {
                    "@id": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/"
                },
                "inLanguage": "en-US",
                "isAccessibleForFree": true,
                "author": {
                    "@type": "Organization",
                    "name": "DSE Security Editorial Team",
                    "url": "https://update.dsesecurity.com/#editorial-team"
                },
                "publisher": {
                    "@id": "https://dsesecurity.com/#organization"
                },
                "image": {
                    "@type": "ImageObject",
                    "@id": "https://update.dsesecurity.com/updates/wireshark-checksum-offload-capture-point/#primaryimage",
                    "url": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-social-v2.jpg?v=1.8.20",
                    "contentUrl": "https://update.dsesecurity.com/assets/editorial/network-infrastructure-social-v2.jpg?v=1.8.20",
                    "width": 1200,
                    "height": 630,
                    "caption": "Check capture offloading before diagnosing checksum corruption"
                },
                "articleSection": [
                    "IT",
                    "Networks & Infrastructure"
                ],
                "keywords": [
                    "IT",
                    "Networks & Infrastructure",
                    "Guide",
                    "Information priority"
                ],
                "genre": "Guide",
                "about": [
                    {
                        "@type": "Thing",
                        "name": "IT",
                        "url": "https://update.dsesecurity.com/topic/it/"
                    },
                    {
                        "@type": "Thing",
                        "name": "Networks & Infrastructure",
                        "url": "https://update.dsesecurity.com/topic/networks-infrastructure/"
                    }
                ],
                "wordCount": 247,
                "timeRequired": "PT2M",
                "publishingPrinciples": "https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/",
                "usageInfo": "https://update.dsesecurity.com/usage/",
                "copyrightHolder": {
                    "@id": "https://dsesecurity.com/#organization"
                },
                "copyrightNotice": "Copyright © 2026 Detection Systems & Engineering. All rights reserved.",
                "citation": {
                    "@type": "CreativeWork",
                    "name": "Wireshark — User’s Guide, Checksums",
                    "url": "https://www.wireshark.org/docs/wsug_html_chunked/ChAdvChecksums.html"
                }
            }
        ]
    }
}