GitHub - tylertreat/comcast: Simulating shitty network connections so you can build better systems.
Testing distributed systems under hard failures like network partitions and instance termination is critical, but it's also important we test them under less catastrophic conditions because this is what they most often experience. Comcast is a tool designed to simulate common network problems like latency, bandwidth restrictions, and dropped/reordered/corrupted packets. It works by wrapping up som
GitHub - Shopify/toxiproxy: :alarm_clock: A TCP proxy to simulate network and system conditions for chaos and resiliency testing
Toxiproxy is a framework for simulating network conditions. It's made specifically to work in testing, CI and development environments, supporting deterministic tampering with connections, but with support for randomized chaos and customization. Toxiproxy is the tool you need to prove with tests that your application doesn't have single points of failure. We've been successfully using it in all de
Introduction to modern network load balancing and proxying
It was brought to my attention recently that there is a dearth of introductory educational material available about modern network load balancing and proxying. I thought to myself: How can this be? Load balancing is one of the core concepts required for building reliable distributed systems. Surely there must be quality information available? I searched and found the pickings are indeed slim. The
通信系ã®ãƒ‡ãƒãƒƒã‚°ã«ã¯ Charles ãŒä¾¿åˆ© - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? ã¯ã˜ã‚ã« Charles を使ã†ã¨ PC 上㫠HTTP プãƒã‚ã‚·ã‚’ç«‹ã¦ã¦ç«¯æœ«ã®é€šä¿¡ã‚’ã‚ャプãƒãƒ£ã—ã€ãƒªã‚¯ã‚¨ã‚¹ãƒˆã‚„レスãƒãƒ³ã‚¹ã®å†…容を覗ã„ãŸã‚Šæ›¸ãæ›ãˆã‚‹ã“ã¨ãŒå‡ºæ¥ã‚‹ã€‚é¡žä¼¼ã®ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã¨ã—㦠Wireshark ã‚„ Fiddler, Paros ãŒã‚る。 アプリã®é–‹ç™ºã‚’ã—ã¦ã„ã¦ã‚ˆãã‚ã‚‹ã®ã¯ã€APIãŒã‚¹ã‚¿ãƒ–ã§å›ºå®šå€¤ã—ã‹è¿”ã—ã¦ãã‚Œãªã„ã€ç•°å¸¸ç³»ã‚¨ãƒ©ãƒ¼ã®ãƒ‡ãƒãƒƒã‚°ãŒã‚„ã‚Šã¥ã‚‰ã„ã€ã¨ã„ã†å ´é¢ã ãŒã€Charles ãªã‚‰é€šä¿¡ã‚’好ãã«å€¤ã‚’書ãæ›ãˆã‚‰ã‚Œã‚‹ã®ã§ã“れらã«ç°¡å˜ã«å¯¾å‡¦ã™ã‚‹ã“ã¨ãŒã§ãる。 Charles 㯠Java アプリãªã®ã§ OS X ã ã‘ã§ãªã W
Building messaging in Go network clients
Learn useful Go communication techniques from the internals of the NATS client. In today’s world of data-intensive applications and frameworks tailored to tasks as varied as service discovery and stream processing, distributed systems are becoming ubiquitous. A reliable and high-performing networking client is essential to accessing and scaling such systems. Often, implementing a network client fo
ZeroTier – Global Area Networking
Get a direct two-way connection with IoT devices in the field, no matter what internet connection they use or where they are in the world. Device-centric architecture is optimized for IoT deployments Lightweight agent is easy to install on just about any device Unique network structure makes last mile connection easy Easily connect store locations, campuses, branch offices, construction sites, and
Network Protocol Breakdown: Ethernet and Go
I am moving my blog content to mdlayher.com. Please see the updated version of this content at: https://mdlayher.com/blog/network-protocol-breakdown-ethernet-and-go/ If you’re reading this article right now, chances are pretty good that there’s an Ethernet (IEEE 802.3) link somewhere between your device and the server hosting this blog. The Ethernet family of networking technologies are a fundamen
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先日Twitterã«æ¬¡ã®ã‚ˆã†ãªæ›¸ãè¾¼ã¿ã‚’ã—ãŸã¨ã“ã‚æ€ã£ãŸã‚ˆã‚Šåå¿œãŒè‰¯ã‹ã£ãŸã®ã§ã€è©³ç´°ã®è¨å®šã‚’紹介ã—ã¾ã™ã€‚ UDP53番ã€TCP443番ã€UDP123番ã¨ãƒãƒ¼ãƒˆãƒŽãƒƒã‚ングをã™ã‚‹ã¨TCP443番ã«10秒ã ã‘sshdãŒç¾ã‚Œã‚‹ã€ã¨ã„ã†ä¸äºŒç—…全開ã®è¨å®šã‚’ã—ãŸã€‚皆様ã«ã‚‚ãŠå‹§ã‚ã—ãŸã„。— hnw (@hnw) 2017å¹´3月26æ—¥ ã¨ã„ã£ã¦ã‚‚特殊ãªã“ã¨ã‚’ã—ãŸã‚ã‘ã§ã¯ãªãã€knockdã§ãƒãƒ¼ãƒˆãƒŽãƒƒã‚ングã®è¨å®šã‚’è¡Œã„ã€iptablesã¨çµ„ã¿åˆã‚ã›ã¦å®Ÿç¾ã—ã¾ã—ãŸã€‚ ãƒãƒ¼ãƒˆãƒŽãƒƒã‚ングã¨ã¯ ãƒãƒ¼ãƒˆãƒŽãƒƒã‚ングã¨ã„ã†ã®ã¯ã€æ±ºã‚られãŸãƒãƒ¼ãƒˆã‚’決ã‚られãŸé †ç•ªã§å©ãã“ã¨ã§ãƒ•ã‚¡ã‚¤ã‚¢ãƒ¼ã‚¦ã‚©ãƒ¼ãƒ«ã«ç©´ã‚’空ã‘られるよã†ãªä»•çµ„ã¿ã®ã“ã¨ã§ã™ã€‚ãƒãƒ¼ãƒˆãƒŽãƒƒã‚ングを使ãˆã°ã€TCPã®7000番ã€8000番ã€9000番ã®3ãƒãƒ¼ãƒˆã«ãƒ‘ケットをé€ã‚Šã¤ã‘ã‚‹ã¨22番ãƒãƒ¼ãƒˆ (SSH) ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ãŒè¨±å¯ã•ã‚Œã‚‹ã€ã¨ã„ã£ãŸè¨å®šãŒã§ãã¾ã™ã€‚ ãƒãƒ¼ãƒˆãƒŽãƒƒã‚ングã®
Cache p2p
In today’s fast-paced digital world, we expect to access information and entertainment within seconds. We don’t want to wait; we want it all instantly. This is especially true when it comes to downloading content from websites. Long gone are the days of waiting for images to load or files to be available for download. In […]
EdgeRouter X ãŒã™ã”ã„ | yabe.jp
最近北米ã®è‡ªå®…ã¨æ—¥æœ¬ã®å®Ÿå®¶ã« VPN ã‚’è¨ã‘ã¦ã„ã‚ã„ã‚ã‚„ã‚ŒãŸã‚‰ã„ã„ãªãƒ¼ã¨æ€ã„ã€ãƒ«ãƒ¼ã‚¿ãƒ¼ã‚’物色ã—ãŸã‚‰ãªã‹ãªã‹ã™ã”ã„ヤツを発見ã—ãŸã®ã§ã€è²·ã£ã¦ã¿ã¾ã—ãŸã€‚ EdgeRouter ã¨ã¯ 地元サンノゼã®ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯æ©Ÿå™¨ãƒ™ãƒ³ãƒãƒ£ãƒ¼ Ubiquiti Networks ã®ãƒ«ãƒ¼ã‚¿ãƒ¼è£½å“群ã§ã™ã€‚ã“ã®ãƒ«ãƒ¼ã‚¿ãƒ¼ã¯ãƒ‡ãƒ¼ã‚¿ã‚»ãƒ³ã‚¿ãƒ¼ç‰ã§ä½¿ã‚れる Linux 系高機能ソフトウェアルーター Vyatta （Brocade ã® vRouter ã®æºæµï¼‰R6.3 をベースã«ã—㟠EgdeOS æ載ã®ãƒ«ãƒ¼ã‚¿ãƒ¼è£½å“ã§ã™ãŒã€ä¿¡ã˜ã‚‰ã‚Œãªã„コストパフォーマンスã¨ã€ amazon.com ã§ã®è©•ä¾¡ãŒç•°å¸¸ã«é«˜ã„ã®ãŒç‰¹å¾´ã§ã™ã€‚ ã¡ãªã¿ã«ç§ãŒè²·ã£ãŸã®ã¯æœ€å»‰ä¾¡ãƒ¢ãƒ‡ãƒ«ã® EdgeRouter X ã§ã™ãŒã€ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã‚ªãƒ•ãƒãƒ¼ãƒ‰æœ‰åŠ¹æ™‚ã§ãƒ«ãƒ¼ãƒ†ã‚£ãƒ³ã‚°æœ€å¤§ 940 Mbps ã€IPsec VPN 最大 200 Mbps ã€RIP / BGP / OSP
GitHub - mehrdadrad/mylg: Network Diagnostic Tool
================================================= _ ___ _ __ _ _| | / __| | ' \ || | |_| (_ | |_|_|_\_, |____\___| |__/ My Looking Glass Free Network Diagnostic Tool www.facebook.com/mylg.io http://mylg.io ================== myLG v0.2.6 ================== local> hping https://www.google.com -trace -c 4 HPING www.google.com (216.58.194.196), Method: HEAD, DNSLookup: 17.2923 ms HTTP Response seq=0,
『最速を究ã‚ã‚‹! 2ã¤ã®ã‚µãƒ¼ãƒé–“ã§ç‰¹ç››ã‚Šãƒ‡ãƒ¼ã‚¿ã‚’30å€é€Ÿã§è»¢é€ã™ã‚‹æ–¹æ³•ã€
最速を究ã‚ã‚‹! 2ã¤ã®ã‚µãƒ¼ãƒé–“ã§ç‰¹ç››ã‚Šãƒ‡ãƒ¼ã‚¿ã‚’30å€é€Ÿã§è»¢é€ã™ã‚‹æ–¹æ³• | サイãƒãƒ¼ã‚¨ãƒ¼ã‚¸ã‚§ãƒ³ãƒˆ å…¬å¼ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ–ãƒã‚° ã“ã‚“ã«ã¡ã¯. エンジニアã®å¹³é‡Žã§ã™. ãµã ã‚“ã¯ãƒ—ライベートクラウドã®ã‚µãƒ¼ãƒãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã¨ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã‚’担当ã—ã¦ã„ã¾ã™. サーãƒã®ãƒªãƒ—レイスや増è¨, 仮想サーãƒã®ç§»æ¤ãªã©ã§ãƒ†ãƒ©ãƒã‚¤ãƒˆã‚¯ãƒ©ã‚¹ã®ãƒ‡ãƒ¼ã‚¿ã‚’2ã¤ã®ã‚µãƒ¼ãƒé–“ã§è»¢é€ã™ã‚‹ã“ã¨ãŒã‚ˆãã‚ã‚Šã¾ã™. ã“ã‚“ãªã¨ã, 転é€çµ‚了を待ã¡ãªãŒã‚‰ã€Œã‚ã¨ä½•æ™‚間掛ã‹ã‚‹ã®ã‹ãªãƒ¼ã€ã¨ã‹ã€Œã‚‚ã£ã¨é€Ÿã転é€çµ‚ã‚らãªã„ã‹ãªãƒ¼ã€ãªã‚“ã¦è€ƒãˆãŸã“ã¨ã¯ã‚ã‚Šã¾ã›ã‚“ã‹? 今回ã¯ä¸‹è¨˜ã®ã‚ˆã†ãªã‚·ãƒ¼ãƒ³ã§æ´»èºã™ã‚‹, 特盛りデータを30å€é«˜é€Ÿã«è»¢é€ã™ã‚‹æ–¹æ³•ã‚’ã”紹介ã—ã¾ã™. - サーãƒã®äº¤æ›ã§ãƒ‡ãƒ¼ã‚¿ã‚’移è¨ã—ãŸã„ - MySQLスレーブサーãƒã®å¢—è¨ã—ãŸã„ - 仮想サーãƒã‚’別ã®ãƒ›ã‚¹ãƒˆã«ç§»æ¤ã—ãŸã„ - 大é‡ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚’別ã®ã‚µãƒ¼ãƒã«ç§»è¨ã—ãŸã„ - 大容é‡ãƒ‡ãƒ¼ã‚¿ã‚’ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã—ãŸã„ ■環境を用
Monitoring and Tuning the Linux Networking Stack: Receiving Data | Packagecloud Blog
Monitoring and Tuning the Linux Networking Stack: Receiving Data TL;DR This blog post explains how computers running the Linux kernel receive packets, as well as how to monitor and tune each component of the networking stack as packets flow from the network toward userland programs. UPDATE We’ve released the counterpart to this post: Monitoring and Tuning the Linux Networking Stack: Sending Data.
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