dns | 易学教程

Using ALIAS for ELB if main website DNS manager is not Route 53

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问题 I use Netlify to host my static site example.com . Since I don't want to append www , I have to use Netlify's DNS nameservers. example.com uses API backend api.example.com , which is a CNAME record that resolves to an ELB address *.elb.amazonaws.com . So 2 DNS lookup is required: first to example.com then to *.elb.amazonaws.com . Alternative: Setup Route 53 with another custom domain example.org with an ALIAS record api.example.org that points to *.elb.amazonaws.com , and use api.example.org

Curl slow multithreading dns

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问题 The program is made in C++, and it indexes webpages, so all domains are random domain names from the web. The strange part is that the dns fail / not found percentage is small (>5%). here is the pmp stack trace: 3886 __GI___poll,send_dg,buf=0xADDRESS,__libc_res_nquery,__libc_res_nquerydomain,__libc_res_nsearch,_nss_dns_gethostbyname3_r,gaih_inet,__GI_getaddrinfo,Curl_getaddrinfo_ex 601 __GI___poll,Curl_socket_check,waitconnect,singleipconnect,Curl_connecthost,ConnectPlease,protocol_done

bash script: word occurrences in web sites

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问题 I need to make a script that counts the word occurrences on the web pages what I'm doing is calculating random IPs (avoiding checking the same ips more than once), using nmap to see if the port 80 is open to know if it's a web server and then I use w3m to make the http page as file. After it's easy to count the word occurances I got a few questions and problems This process takes A LOT, but I can't think any method to make it quicker Many of the ips with the port 80 open aren't web sites,

Map my domain name with my own server

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问题 Hi I am having my own domain mydomain.ac.in and i am having my own server (windows 2008) and a Public static IP. Now i want to host my site in my own server. Please give me the step by step information to get it done. Thanks. 回答1: You need to register your domain with some DNS hosting service (DNS provider), there is such an astronomic number of these on the web that I do not want to spam the site. Google. Also, collocation center where you keep this server (and from where you have probably

How do I set up a DNS container inside docker-compose?

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问题 I think this may be an XY problem, so I'll include the context of the question since I don't know the best way to solve this problem. I have a kubernetes environment set up on AWS such that I have two parts, an nginx container, and a backend service (which I'll call SvcA). Since the backend service can come and go, in my nginx config I have something that looks like: resolver kube-dns.kube-system.svc.cluster.local valid=60s ipv6=off; server { # stuff location / { set $backend "SvcA.default

IE8 Javascript document.domain error

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问题 I need to change the domain of the document and then set it back again to the original value. It looks something like this [the page is on domain base.site.com]: function execute () { document.domain = "site.com"; // Access an object that is on another frame, but did the same set of the domain document.domain = "base.site.com"; // Access an object that is on this page (window.createPopup ()) } The problem is that this works fine on IE6 (I did not test on 7). But it gives me an error [Invalid

Private domain-wide (published) Add-on not visible in marketplace search

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问题 I've followed the following instructions... Publishing an Add-on https://developers.google.com/apps-script/add-ons/publish Then followed these instructions.... Publishing Add-ons for Domain-Wide Installation https://developers.google.com/apps-script/add-ons/domain-wide No errors, but the add-on refuses to appear in the private published apps list, with the following message "There are no private apps published for your domain". The status of my project is listed as: Published GAM: Published I

RedHat8上配置DNS（笔记）

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欢迎有疑问的读者与我交流需要完成事件： 1.安装bind服务程序； 2.DNS域名正/反向解析服务； 3.部署从服务器； 4.安全的加密传输； 5.部署缓冲服务器； 6.分离解析技术。 Bind简介： Linux中通常使用bind来实现DNS服务器的架设，bind软件由isc(www.isc.org)维护。在yum仓库中可以找到软件，配置好yum源，直接使用命令yum install bind就可以安装。当前bind的稳定版本为bind9，bind的服务名称为named，监听的端口为 53号端口。bind的主要配置文件为/etc/named.conf，此文件主要用于配置区域，并指定区域数据库文件名称。区域数据库文件通常保存于 /var/named/ 目录下，用于定义区域的资源类型。准备开始查看本地物理机IP地址: 从上图可见：图中最下因为我是连接校园网无线网，然后虚拟机准备使用桥接模式 (若对虚拟机三种网络模式的区别不明白，请参考： https://blog.csdn.net/Alpha_B612/article/details/80979101 )，所以我选择将虚拟机的网段与网关与图中最下面的保持一致；设置虚拟机的IP：查询虚拟机网卡：配置：请注意上图： 1）请注意设置的IP地址的掩码长度，我这里与本地物理主机一致16位 2）网卡使用nmcli conn up

Redirect website to another website if blocked in particular region

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问题 One of my client website is blocked in UAE, how can I redirect UAE users to another website if current website is blocked? for example: www.abc.com is accessible to the world but not UAE. I want UAE users to redirect to another website (i.e. www.xyz.com) if www.abc.com is blocked in their region. 来源： https://stackoverflow.com/questions/30782825/redirect-website-to-another-website-if-blocked-in-particular-region

ipv6 dns name unresolved from ipv4 network

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问题 I am having a strange problem which seems to be a problem of ipv6 vs ipv4 dns names. I have a real time scraper which runs on my server which runs on ipv6 network. After scraping, this scraper returns some urls to images on a web page via ajax calls and then the images are shown in the browser on my local machine via the links returned by the scraper. But these urls are not resolved on my local network. My local machine does not run on ipv6 network. Also the web page being scraped hosts the