dns

mac dns look up misbehaving

由 你离开我真会死。 提交于 2019-12-20 05:23:15
问题 Got a new mac and now I'm trying to install/update some stuff. THe first issue I get is that http requests made from inside scripts/programs (such as git or ruby gem) doesn't work. I'll put an example below of the workaround I used because it illustrates the issue better than any explanation. Any help is appreciated! Leonardos-MacBook-Air:~ leo$ git clone git://github.com/sstephenson/rbenv.git .rbenv Cloning into '.rbenv'... fatal: Unable to look up github.com (port 9418) (nodename nor

c-ares specifying network interface for the DNS resolves

由 自闭症网瘾萝莉.ら 提交于 2019-12-20 04:29:12
问题 Is there a way in which you can set the network interface to which the DNS requests can be bound to. We have a project which requires to use a highpriority streaming session go through one interface and all the other requests channeled through the second one. example: setting 'eth0' so that all the ares requests will go through 'eth0' and not on 'wlan0'. I was not able to find any API in c-ares (in ares_init_options() API) that gives this option of setting interface. Can you please let me

coredns crashloopbackoff in kubernetes

由 邮差的信 提交于 2019-12-20 04:28:10
问题 I have setup kubernetes in ubuntu 16.04 . I am using kube version 1.13.1 and using weave for networking. I have initialized the cluster using : sudo kubeadm init --token-ttl=0 --apiserver-advertise-address=192.168.88.142 and weave: kubectl apply -f "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')" All the pods seems to be running fine but coredns always remains in CrashLoopBackOff status. I have read mostly all the solution available for this. NAME READY

Amazon Route 53 + Heroku app not accessible from certain places - what to do?

由 六月ゝ 毕业季﹏ 提交于 2019-12-20 04:20:57
问题 I am working on a Heroku and don't have much background in networking. The app I am working on seems to be unreachable from some places. We got reports from people not being able to access it A ping service we use (Statuscake) reports that the site is consistently unreachable from certain node locations To fix that, we moved DNS to Amazon Route 53. A week after, there is a change in what countries work by the ping service, but essentially we're still permanently down for some world locations,

域名解析问题。

由 纵然是瞬间 提交于 2019-12-20 03:35:22
【域名劫持】 在做长连接时，使用域名的方式连接服务器。但有些情况下，使用的域名被运营商等劫持&篡改了。导致不能使用。 【解决方案】 当感知到域名出现问题后，可以尝试从另一个安全的渠道上去获得一个确切的IP地址。 然后尝试去连接。 【使用域名的好处】 用域名来代替IP地址来进行连接，可以带来OP的收益。 进行无缝ip切换等情况。 【参考文章】 http://blog.csdn.net/lize1988/article/details/10404645 【后记】 虽然DNS解析能够加快ip（解析到正确的IP上去）的解析速度。但从客户端到DNS解析服务器也是需要时间的。特别是在2G网络下（比如：一般情况下DNS服务器在北京的大机房中，而我们查找DNS服务器需要从手机到公司路由，然后在到海淀的路由，然后有可能走到带有DNS服务器的路由器上面去。所有此段是比较耗时的。） 来源： https://www.cnblogs.com/xitang/p/3732231.html

Fast concurrent checking of SOA DNS records for .co.za domains

由 北战南征 提交于 2019-12-20 03:23:51
问题 I want to implement bulk availability checking of .co.za domain names as accurately as possible by checking for the existence of SOA or MX records using C# ASP.NET. I am looking for a solution that can check for the relevant DNS records in a way that properly utilises threading to check at least 10 domains at a time. "Why don't you just use an API?" The only truly accurate way of checking the availibility of a .co.za domain is to use http://co.za/whois.shtml, but the archaic WHOIS service

Can I use Golang to get the internal domain name of an Active Directory environment?

由 只愿长相守 提交于 2019-12-20 03:23:39
问题 I want to use Golang to get the FQDN of the internal Windows domain I am on. If the name was CORP.com, for example, I want a small script in Golang to find this for me. Is this possible? 回答1: There's no built-in way using Go's stdlib, however, you might be able to do it by looking up the short hostname by DNS (to get the IP known by DNS), then doing a reverse lookup of that IP by DNS (which should give you the machine's FQDN), the end of which (minus the short hostname) should be your AD

How can I Connect my domain name to my Azure Virtual Machine IP?

由 社会主义新天地 提交于 2019-12-20 03:19:51
问题 I am having a virtual machine on Azure running a website with IP Address http://13.67.182.83/ I am having also a domain name called nit-eg.com that I need it to point to the IP address I changed the A records and CName to point to the IP but this made the domain name to be down and gave me the following error This site can’t be reached www.nit-eg.com’s server DNS address could not be found. Search Google for nit ERR_NAME_NOT_RESOLVED So that I changed the CName to point to the old site again

Windows2012R2备用域控搭建

由 大兔子大兔子 提交于 2019-12-20 03:11:27
Windows2012R2备用域控搭建 前置操作 域控 主域控的主dns：自己的ip 备域控的主dns：自己的ip，备dns：主域控的ip 客户端 主dns：主域控的ip，备dns：备域控的ip 一般说主和备，主要是指担任PDC放置的角色的这台DC，所有修改密码的操作必须由这台DC应答 除了修改密码、域管理、林管理，其他操作（主要是身份验证）都可以随便抓一台DC来完成 DNS是一个列表，在整个林里面同步，除了PDC放置有单独的列表，其它DC一般没有权重 也就是PDC故障，如果不需要修改用户的密码，可以不用管 备用域控端 1、配置域控ip，ipv6去掉，禁用TCP/IP上的NetBIOS，首选DNS服务器填写：192.168.1.20 192.168.1.20是主域控的IP地址，因为要发现当前环境中的域，那么DNS就要指向主域控的IP地址 2、安装AD域服务 安装AD域服务的同时，操作系统会同时安装好DNS服务器 3、点击服务器管理器右上角的小旗帜，弹出对话框，点击“将此服务器提升为域控制器”以提升为域控 4、手动输入域名，这里不要点击选择按钮，直接输入windows域的域名即可 输入域用户和密码 5、输入目录服务还原模式DSRM密码 6、直接下一步 7、直接下一步，复制自这里保持默认即可，也就是“任何域控制器” 8、直接下一步 9、直接下一步 10、开始安装，安装过程中会突然断网

CDN基本工作过程

由 故事扮演 提交于 2019-12-20 00:31:09
看了一些介绍CDN的文章，感觉这篇是讲的最清楚的。 　　使用CDN会极大地简化网站的系统维护工作量，网站维护人员只需将网站内容注入CDN的系统，通过CDN部署在各个物理位置的服务器进行全网分发，就可以实现跨运营商、跨地域的用户覆盖。由于CDN将内容推送到网络边缘，大量的用户访问被分散在网络边缘，不再构成网站出口、互联互通点的资源挤占，也不再需要跨越长距离IP路由了。 　　CDN是如何工作的呢？让我们先看看没有CDN服务时，一个网站是如何向用户提供服务的。 　　今天我们看到的网站系统基本上都是基于B/S架构的。B/S架构，即Browser-Server（浏览器 服务器）架构，是对传统C/S架构的一种变化或者改进架构。在这种架构下，用户只需使用通用浏览器，主要业务逻辑在服务器端实现。B/S架构，主要是利用了不断成熟的WWW浏览器技术，结合浏览器的多种Script语言（VBScript、JavaScript等）和ActiveX等技术，在通用浏览器上实现了C/S架构下需要复杂的软件才能实现的强大功能。 　　用户通过浏览器等方式访问网站的过程如图1-2所示。 ①用户在自己的浏览器中输入要访问的网站域名。 ②浏览器向本地DNS服务器请求对该域名的解析。 ③本地DNS服务器中如果缓存有这个域名的解析结果，则直接响应用户的解析请求。 ④本地DNS服务器中如果没有关于这个域名的解析结果的缓存
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