wireshark

Interpreting Frame Control bytes in 802.11 Wireshark trace

由 谁都会走 提交于 2019-12-20 12:21:52
问题 I have a Wi-Fi capture ( .pcap ) that I'm analysing and have run across what appear to me to be inconsistencies between the 802.11 spec and Wireshark's interpretation of the data. Specifically what I'm trying to pull apart is the 2-byte 802.11 Frame Control field. Taken from http://www4.ncsu.edu/~aliu3/802.bmp, the format of the Frame Control field's subfields are as follows: And below is a Wireshark screen cap of the packet that has me confused: So as per the Wireshark screenshot, the flags

Mapping HTTP requests to HTTP responses

由 一曲冷凌霜 提交于 2019-12-20 10:46:57
问题 If I make multiple HTTP Get Requests to the same server and get HTTP 200 OK responses to each one how do I tell which request maps to which response using Wireshark? Currently it looks like an http request is made, and the next HTTP 200 OK response is quickly received so everything is in a the proper sequence. I have seen things to the contrary however. For example using the Google Maps API v2 I've made several requests for location information and then the information is received in an

What is the reason and how to avoid the [FIN, ACK] , [RST] and [RST, ACK]

由 非 Y 不嫁゛ 提交于 2019-12-20 08:59:48
问题 What is the reason and how to avoid the [FIN, ACK] , [RST] and [RST, ACK] ? Is it due to some mismatch between the TCP parameters of the SO´s? What does it mean when the server replies [FIN, ACK] in a TCP/IP connection? 10.118.113.237 is a Solaris box, while 10.118.110.63 is a Linux box. No. Time Source Destination Protocol Length Info 1 0.000000000 10.118.113.237 10.118.110.63 TCP 68 mmpft > 39679 [FIN, ACK] Seq=1 Ack=1 Win=49232 Len=0 TSval=62389927 TSecr=355193509 2 0.000015000 10.118.110

How can I add a custom protocol analyzer to wireshark?

由 青春壹個敷衍的年華 提交于 2019-12-20 08:28:00
问题 I have a custom protocol that I'm looking at in wireshark. I thought it'd be useful if wireshark could disect it for me so that I don't have to decode the hex. Although I'm doing this in my program logs, wireshark captures the whole conversation with timing info so it'd be more useful there. Can this be easily done? 回答1: It depends on your definition of "easily". It's definitely doable - Wireshark has great support for pluggable dissectors. README.developer is apparently the "best manual" for

How to automate measuring of bandwidth usage between two hosts

由 我怕爱的太早我们不能终老 提交于 2019-12-20 05:30:36
问题 I have an application that has a TCP client and a server. I set up the client and server on separate machines. Now I want to measure how much bandwidth is being consumed ( bytes sent and received during a single run of the application). I have discovered that wireshark is one such tool that can help me get this statistic. However, wireshark seems to be GUI dependent. What I wanted was a way to automate the measuring and reporting of this statistic. I dont care about the information about

Safari Sends Two HTTP Req. Same Time/Socket

由 痴心易碎 提交于 2019-12-20 04:35:06
问题 I have an IPad Safari sending two HTTP requests (two different PNG) files within 30 ms. I thought that even on a Keep Alive HTTP 1.1 connection there should be a clear sequence of request/response. What I saw is that the Safari browser sends two GET requests within 30 ms without waiting for an answer. This causes problems in some web servers. Situation: I have an HTML5 loading an SVG with further references to other images (like PNG and GIF). The problem does not occur on IPhone 5 but on the

网络嗅探与欺骗

由 試著忘記壹切 提交于 2019-12-20 00:15:43
中国人民公安大学 Chinese people ’ public security university 网络对抗技术 实验报告 实验二 网络嗅探与欺骗 学生姓名 苗基壮 年级 2014级 区队 二区队 指导教师 高见 信息技术与网络安全 学院 2017 年 11 月 7 日 实验任务总纲 20 17 —20 18 学年 第 一 学期 一、实验目的 1．加深并消化本课程授课内容，复习所学过的互联网搜索技巧、方法和技术； 2．了解并熟悉常用的网络嗅探方式，掌握常用抓包软件的使用方法和过滤技巧，能够对给定的数据包分析网络基本行为；掌握ARP欺骗的基本原理，以及基于ARP欺骗的DNS攻击方式； 3．达到巩固课程知识和实际应用的目的。 二、实验要求 1．认真阅读每个实验内容，需要截图的题目，需清晰截图并对截图进行标注和说明。 2．文档要求结构清晰，图文表达准确，标注规范。推理内容客观、合理、逻辑性强。 3．软件工具可使用office2003或2007、CAIN、Wireshark等。 4．实验结束后，保留电子文档。 三 、实验步骤 1．准备 提前做好实验准备，实验前应把详细了解实验目的、实验要求和实验内容，熟悉并准备好实验用的软件工具，按照实验内容和要求提前做好实验内容的准备。 2．实验环境 描述实验所使用的硬件和软件环境（包括各种软件工具）； 开机并启动软件office2003或2007

2019.12.19 解决爬虫爬百度网页，而百度针对ip做页面缓存问题

由 一笑奈何 提交于 2019-12-19 20:51:14
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 1.问题起因 公司太小，居然让我一个后端去写前端代码，心痛。 更恶心的是，老板要求我写一个 天气展示的插件，要求和百度一模一样 。 天可怜见呀，我看着前端代码首先就反胃，让我写前端，你不如杀了我。 但是无可奈何，我又不敢辞职，只能硬着头皮上了。 但是能力实在有限，左思右想下，下定决心，干脆把百度天气页面爬下来，截取其中的天气插件部分。 于是乎，后台写了一个爬虫，前端页面读取后台，后台请求百度，并缓存一分钟。 (大家千万别学我，万一哪天百度改了这个插件，你会发现你要完蛋了) 结果是非常成功，做的和百度分毫不差(百度的天气插件真的不错)，然而悲催的事情来了。今天我看这个天气页面的时候发现时间居然是上周的时间，顿时感觉不妙。 2. 原因分析 我通过wireshark看到请求结果，返回的是上周的天气。 并且我在服务器上直接curl返回的是上周天气，而本地则返回当前时间的天气 由此我做一下猜测。 百度对服务器的ip做了缓存，当服务器请求"深圳天气"时，就会返回缓存页面。 这下可把我搞吐血了，我做出大量实验 3.方案 方案1： 前端直接去请求百度页面，然后对页面剪裁。 然而，不管是script还是iframe，全部告知跨域（跨域真的是毒瘤） 方案2： 后台去搞ip代理，但是国外的ip直接会被百度拦下来

Chrome and Firefox CORS AJAX calls get aborted on some Mac machines

由 白昼怎懂夜的黑 提交于 2019-12-19 05:54:06
问题 We have a webpage at www.saddleback.com/live and Chrome and Firefox CORS AJAX calls get aborted on some Mac machines. On a Mac with OSX 10.9 (latest updates), Chrome and Firefox (with latest updates) the AJAX call to http://api.saddleback.com/WorshipService?version=2&null&_=1386201207191 gets aborted. This works on Safari. This behavior is isolated but reproducible on some machines but not others. We have other Mac machines with identical OS and browser version that successfully bring up the

How to export printable text only(or any other packet property) in wireshark

由 ℡╲_俬逩灬. 提交于 2019-12-19 04:02:40
问题 Long story short - I'm capturing SQLs from vendor tool to Oracle database by using Wireshark. It already has decoder for TNS protocol (which is great) and I can access text of SQL by Right Click->Copy->Bytes(Printable Text Only). The problem is that there are tons of packets and doing right-click on each of them could take ages. I was wondering if there any way to export 'Printable Text Only' right from Wireshark. Ideally I want to have a text file with statements. Any help will be highly
订阅 wireshark