TCP

Laura's Lab
troubleshooting
security
Wireshark
TCP
mapping
customization
TLS
challenge
HTTP
DNS
online events

Virtual Event Hosting and Video Streaming Troubleshooting

Last week, thousands of IT professionals and students joined us for CORE-IT, a free training/mentoring/badging event that we'd begun plan...

Laura Chappell

The "Legit" DDoS on PG&E

See the legitimate DDoS on PG&Es site after they announced that power would be shut off to upwards of 800,000 customers in October 2019.

Laura Chappell

Packet Challenge: Look it Up in the Dictionary [100119]

Packet Challenge: Look it up in the Dictionary - download the trace file and test your skills on this Packet Challenge.

Laura Chappell

Troubleshooting SYNs of the Network

After a painfully slow LinkedIn launch, I grabbed the traffic and saw some definite issues in the TCP handshake processes.

Laura Chappell

Customize the Wireshark Expert

Wireshark is a piece of clay. In this blog, Laura teaches you how to customize the Expert Information - an often overlooked feature.

Laura Chappell

Spurious Retransmissions - a Concern?

Should you be concerned about Spurious Retransmissions in a trace file? What triggers these indications and what should you do?

Laura Chappell

Free TCP Analysis Poster

The Chappell University team will be joining our Partner in Technology Education, Profitap, at Stand 3233 at RSA 2019 in San Francisco! I...

{"items":["5e8bf6afa6733800179c223a","5d9e2b28fa2dba001708f387","5d93fb70fb7aa500175b4d16","5d687bf448977c0016a7f04a","5d52010632d13f0017d3ce33","5d14666726a54500177cbb19","5bef2604fa1d7a001935fd11"],"styles":{"galleryType":"Columns","groupSize":1,"showArrows":true,"cubeImages":true,"cubeType":"fill","cubeRatio":1.3333333333333333,"isVertical":true,"gallerySize":940,"collageAmount":0,"collageDensity":0,"groupTypes":"1","oneRow":false,"imageMargin":16,"galleryMargin":0,"floatingImages":0,"chooseBestGroup":true,"smartCrop":false,"hasThumbnails":false,"enableScroll":true,"isGrid":true,"isSlider":false,"isColumns":false,"isSlideshow":false,"cropOnlyFill":false,"fixedColumns":1,"enableInfiniteScroll":true,"isRTL":false,"minItemSize":50,"rotatingGroupTypes":"","rotatingCubeRatio":"","gallerySliderImageRatio":1.7777777777777777,"numberOfImagesPerRow":1,"numberOfImagesPerCol":1,"groupsPerStrip":0,"borderRadius":0,"boxShadow":0,"gridStyle":1,"mobilePanorama":false,"placeGroupsLtr":false,"viewMode":"preview","thumbnailSpacings":4,"galleryThumbnailsAlignment":"bottom","isMasonry":false,"isAutoSlideshow":false,"slideshowLoop":false,"autoSlideshowInterval":4,"useCustomButton":false,"bottomInfoHeight":0,"titlePlacement":"SHOW_ON_THE_RIGHT","galleryHorizontalAlign":"center","galleryTextAlign":"center","galleryVerticalAlign":"center","scrollSnap":false,"itemClick":"expand","fullscreen":true,"allowSocial":true,"allowDownload":false,"allowTitle":true,"allowDescription":false,"loveButton":true,"loveCounter":false,"videoPlay":"hover","scrollAnimation":"NO_EFFECT","scrollDirection":0,"overlayAnimation":"FADE_IN","arrowsPosition":0,"arrowsSize":23,"watermarkOpacity":40,"watermarkSize":40,"useWatermark":true,"watermarkDock":{"top":"auto","left":"auto","right":0,"bottom":0,"transform":"translate3d(0,0,0)"},"loadMoreAmount":"all","defaultShowInfoExpand":1,"allowTitleExpand":true,"allowDescriptionExpand":true,"allowLinkExpand":true,"expandInfoPosition":0,"allowFullscreenExpand":true,"fullscreenLoop":false,"galleryAlignExpand":"left","addToCartBorderWidth":1,"addToCartButtonText":"","slideshowInfoSize":200,"playButtonForAutoSlideShow":false,"allowSlideshowCounter":false,"hoveringBehaviour":"NEVER_SHOW","thumbnailSize":120,"magicLayoutSeed":1,"imageHoverAnimation":"NO_EFFECT","calculateTextBoxHeightMode":"AUTOMATIC","calculateTextBoxWidthMode":"PERCENT","textBoxHeight":0,"textBoxWidth":200,"textBoxWidthPercent":50,"textImageSpace":10,"textBoxBorderRadius":0,"textBoxBorderWidth":0,"textsVerticalPadding":0,"textsHorizontalPadding":-30,"titleDescriptionSpace":6,"customButtonText":"","customButtonBorderWidth":1,"customButtonBorderRadius":0,"loadMoreButtonText":"","loadMoreButtonBorderWidth":1,"loadMoreButtonBorderRadius":0,"imageInfoType":"ATTACHED_BACKGROUND","itemBorderWidth":1,"itemBorderRadius":0,"itemEnableShadow":false,"itemShadowBlur":20,"itemShadowDirection":135,"itemShadowSize":10,"imageLoadingMode":"BLUR","expandAnimation":"NO_EFFECT","imageQuality":90,"usmToggle":false,"usm_a":0,"usm_r":0,"usm_t":0,"videoSound":false,"videoSpeed":"1","videoLoop":true,"gallerySizeType":"px","gallerySizePx":940,"itemBorderColor":{"value":"#BFBFBF"},"galleryLayout":2,"modifiedGallerySize":true,"selectedLayout":"2|bottom|1|fill|true|0|true","layoutsVersion":2,"selectedLayoutV2":2,"isSlideshowFont":false,"externalInfoHeight":0,"externalInfoWidth":0.5},"container":{"width":940,"galleryWidth":972,"galleryHeight":1440,"scrollBase":0,"height":null}}