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一蓑烟雨任平生 | blog.syscallx.com Reviews
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TLS 协议 3：扩展字段
http://blog.syscallx.com/2016/06/21/bulletproof-ssl-tls.html
TLS 协议 3 扩展字段. June 21, 2016. 扩展字段在 ClientHello 或者 ServerHello 消息的末尾。 Application Layer Protocol Negotiation. 之前 Google 一直在推广它的 SPDY 协议，并企图将它变成 HTTP 的新标准，事实上 HTTP/2 的制定过程中也大量参考了 SPDY。 虽然 HTTP/2 是一个应用层的协议，但是几乎所有的浏览器都是在 TLS 协议之上支持 HTTP/2，也就是说 HTTP/2 都是 https 链接。 Google 在开发 SPDY 时，也提出了一个新的 TLS 协议扩展 NPN，后来逐渐演化成了 ALPN。 Application layer protocol negotiation. NPN 和 ALPN 主要不同在于. NPN 是服务端发送，客户端选择 ALPN 正好相反。 NPN 选择的协议的结果是在 ChangeCipherSpec 之后加密发送的，而 ALPN 是明文发送，也就是说允许网络路径中间的设备查看到协商的结果 允许路由根据不同的结果决定转发。
TLS 协议 1：协议格式
http://blog.syscallx.com/2016/06/18/tls.html
TLS 协议 1 协议格式. June 18, 2016. 本文部分内容来自 Traffic Analysis of an SSL/TLS Session 的阅读笔记，原文见 此处. TLS 全称为 Transport Layer Security，它本身也分为了 Lower 和 Higher 两层协议。 Lower Layer 协议在 TCP 协议之上，提供面向连接的可靠传输，在这一层的协议主要是记录协议 TLS Record Protocol。 记录协议首先把上层协议传来的数据分成小于2 14字节的数据块，如果设置了压缩选项，则第二步为压缩数据，然后在数据块的末尾增加 MAC Message Authentication Code ，第三步将数据块加密，最后增加记录头。 握手协议 Handshake Protocol 建立通信。 密钥交换协议 ChangeCipherSpec Protocol 让之前协商好的协议生效，此时通信加密。 警告协议 Alter Protocol 通信出现异常时使用，提示用户潜在的安全问题。 程序数据协议 Application Data Protocol 数据通信。
Linux 内核网络栈 (未完成)
http://blog.syscallx.com/2016/09/01/linux-kernel-net.html
September 1, 2016. Http:/ vger.kernel.org/ davem/skb.html. Https:/ wiki.linuxfoundation.org/networking/start. Http:/ www.brendangregg.com/blog/2014-09-06/linux-ftrace-tcp-retransmit-tracing.html. Comments powered by Disqus.
非对称加密的一些概念
http://blog.syscallx.com/2016/11/15/rsa-and-dh.html
November 15, 2016. 上面一共出现了 a, p, Xa, Ya, Xb, Yb, K 共 7 个数，其中. 公开的数 a, p, Ya, Yb. 非公开数 Xa, Xb, K. 通常情况下，a 一般为 2 或 5，而 p, Xa 和 Xb 的取值也非常大，其复杂度至少为. 对于攻击者来说，已知 Ya，Xa 的求解非常困难，同理 Xb 的求解也很困难，所以攻击者难以求出 K，所以 DH 能够保证通信双方在透明的信道中安全的交换密钥。 DH 算法本身并没有提供通讯双方的身份验证功能，也就是说 DH 算法会被中间人攻击。 这时就需要 DSA 数字签名算法 来对传输的数据进行签名，这样使得接受双方可以确认信息的来源。 ECDH 比较好解释，上面已经讲了 DH 算法的原理，那么 ECDH 就是使用椭圆曲线函数的 DH 算法。 上面提到 DH 和 ECDH，这两个名字代表的是算法本身，前者是使用了离散对数的DH，后者是使用的椭圆曲线的DH，他们是算法。 RSA 和 DH 算法各自有他们的优缺点。 ECDH 不支持 PFS，安全性低，同时无法实现 false start。
我是谁？
http://blog.syscallx.com/me
Github https:/ github.com/run. Data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKQAAAAUCAYAAAADf5Y0AAAAAX NSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAMJSURBVG hD7VrbdcIwDM1Q WKX/DJIJugUGYEZ2KELsIVrO7ajlx01QDFFPYdzShDW6 pKVjs4 7EIdB SB4XZzzl4Wg14wYIC0guyKkAyQBkgDZC/twezob1RRMOTFTcPgBvQ6u4Uyy3IGMic3X vOLh M4b/wqFYqeA33TQs56gC4ExnQe0wN9bMlo7Ll ubHlkzF1xIESkAIAWbKATEyQBMoE7ukito ll4t9hz LZ9 sqgIxAOblxHFwVkC2Z Bmwh76PcVr9LueLMv2x1Ss6yEMAeZ1PLJmB7WiCw7 Nx/tbPLCFxgEFDgB6ta/ZADDZJ9uaENGV8gVCf2F...
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Monthly Read Posts in Nov 2016 | KC的废墟堆
http://kingsamchen.github.io/2016/12/04/monthly-read-posts-in-nov-2016
Will you serve in Heaven, or rule in Hell. Monthly Read Posts in Nov 2016. Stack Frame Layout on X86-64. For AMD64 X64 ABI compiliant platforms (such as Linux), the major changes include:. Introduces a red-zone storage area on the stack. Officially makes frame pointer explicitly optional. For Windows X64 ABI(though depictated in supplementary):. No red-zone; instead, a pre-allocated home-space is enforced for every function call. Understanding Security in IoT: SSL/TLS. Why HTTP is not secure? In some ext...
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SysAdmin.IO
Acesso a Multiplos Servidores Com Ssh config(5). Essa é uma pequena dica que queria compartilhar , muitas vezes vejo alguns desenvolvedores ou SysAdmins com acesso à diversos servidores :. User@local:$ ssh user@foo.bar.com. User@local:$ ssh user@foo2.bar.com. Em alguns casos alguns outros parametros são incluidos nos argumentos da conexão como: Porta de conexão não padrão:. Acesso SSH com uma Porta não padrão: 7834. User@local:$ ssh user@foo.bar.com -p 7834. Outra Chave Privada para conexão:. Com isso é ...
Sysadminbloggen – Drömmer tekniker om binära får?
Drömmer tekniker om binära får? Blockerar din operatör TPB? Om du, som jag, då och då kollar om sidan thepiratebay.org är uppe via mobilen så kan du ha lagt märke till att din operatör tvingats ändra i sin DNS. Om du, som jag, då och då kollar om sidan thepiratebay.org. Är uppe via mobilen så kan du ha lagt märke till att din operatör tvingats ändra i sin DNS. Så hur motverkar man då detta otyg? Detta är helt personligt, men jag brukar rekommendera två operatörer; Google Public DNS. 8221; och har verifie...
Thoughts of a sysbite - The mind-o-matics of a critical thinker and programmer
Thoughts of a sysbite. Setting up a cloud server on the Raspberry Pi. August 2, 2015. During the past 2 years I have tried various open source cloud solutions on my Raspberry Pi and Raspberry Pi 2, from ownCloud. Which for my taste, had too many features I didn’t use or needed and which was a bit too slow, to seafile. SpriteSheeper 0.4 Release, a multi platform spritesheet generator. July 29, 2015. August 13, 2015. Run a firefox sync server on the raspberry pi. March 4, 2015. March 4, 2015. March 3, 2015.
all things pragmatic
May 8, 2011. NetApps FAS3100 in VMware environment - 1GE 10GE all in NetApps 3140 Cisco Nexus 5020 and Catalyst 3750 architecture Jumbo frame. Links to this post. Before you start, a few things to do on Cisco or Nexus before attempting to install. Turn DTP (dynamic trunking protocol) off. (Since NetApps does not support it, for more in-depth discussion, please go here [1]). Configure the port-channel to use LACP for Dynamic Multi Mode [2]. FAS3140 and Nexus 5020 in an VMware environment. Ifconfig e0M `ho...
一蓑烟雨任平生
Trie 和 Aho-Corasick 自动机 (未完成). RSA 和 DH (未完成). Kernel 中的 BIC TCP 拥塞控制算法 (未完成). TLS 协议 3 扩展字段. TLS 协议 2 Wireshark 中观察. TLS 协议 1 协议格式.
Blog – Syscare – Sistema Para Home Care
Blog – Syscare – Sistema Para Home Care. Notícias sobre Home Care, Saúde e Atendimento Domiciliar. Home care: motivação e trabalho em equipe beneficiam pacientes. 29 de maio de 2012 Comments. Decisão obriga Estado a oferecer ‘home care’. 29 de maio de 2012 Comments. Home care no plano empresarial. Para o consultor da Atos Origin Brasil, ganhos para empresas, operadoras e hospitais pode chegar a 25% A saúde assistencial caracterizada pela prestação de serviços no local de residência das pessoas, conhecida...
SysCasting Blog
Talento é 1% de inspiração e 99% de transpiração. Curta nossa página no Facebook. Agora ficou mais fácil de você acompanhar novidades, atualizações e dicas do SysCasting, curta nossa página do Facebook. Um novo canal de comunicação lançado para nos aproximar ainda mais dos nossos clientes! Novo filtro na Pesquisa Avançada por Agenciados. Para entender o funcionamento da pesquisa avançada assista o vídeo tutorial Agenciados ( http:/ help.syscasting.com/videos/agenciados/. Defina o Fuso Horário em sua Conta.
Записки склерозного кота | Записки склерозного кота
Ломаем Hakko 939 ESD. По случаю решил себе прикупить одну из именитых паяльных станций, особо много денег отдавать не хотелось, так что решил посмотреть что есть на EBay. Крышечка ключа Nissan Intelligent Key. Intel DP43BF Plug and Don`t Play. Поздравляю всех с Новым 2013 Годом! Вcех поздравляю с Новым 2013 Годом! Чтоб КМки не кусались, РУшки не палились, техника не ломалась, программы не глючили, здоровья, любви и денег! Новый редкий житель коллекции — Radon Plus. LG TV и DTS. Цвет — черный;. 855мм было...
Güvenlik Kamera Sistemleri -
H265 / HEVC NEDİR? Filed under IP Kamera. CCTV KAMERA GÖRÜNTÜLEME SİSTEMLERİ. Filed under IP Kamera. IP Kamera Teknolojisi Nedir? Filed under IP Kamera. GÜVENLİK KAMERALARINDA IP TEKNOLOJİSİ Teknolojinin hızlı ve kendinden emin ilerleyişinden güvenlik amaçlı görüntüleme ve kayıt sistemleri de gereken payı almakta ve bu paralelde her geçen gün kendine yenilikler katarak yoluna devam e. H265 / HEVC NEDİR? CCTV KAMERA GÖRÜNTÜLEME SİSTEMLERİ. IP Kamera Teknolojisi Nedir?
