dns | 易学教程

Mapping a secondary domain to a subdirectory using mod_rewrite

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问题 I am looking to map a secondary domain to a subfolder on my document root. For example, if requests to the domain www.example.com map to my DocumentToot, then requests to www.exampletwo.com go to /sites/files/ . I am unable to accomplish a redirect from www.exampletwo.com/index.html to www.exampletwo.com/sites/files/index.html while making the URL still display www.exampletwo.com/index.html . Any ideas? 回答1: I believe you're looking for something like this: RewriteCond %{HTTP_HOST} ^(www\.)

How to validate a correct domain name and sub domain in php

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问题 How to remove www and validate a valid domain name. Valid Domain domain.com subdomain.domain.com sub-domain.domain.com Invalid Domain www.domain.com www.subdomain.domain.com http://www.domain.com/ http://www.subdomain.com/ www.domain.com/folder/ How the code? $domain ='www.domain.com/folder/'; if() { // validate here } 回答1: First, manually strip out the www. then just make sure it is in the form domain.tld or something.domain.tld $domain = str_replace('www.','',$domain); if(preg_match('/([a

Creating a local custom host name instead of localhost?

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问题 Currently, my flask app runs locally on: http://localhost:5000/some_page How could I create a local custom location for my app like: http://myappname/some_page Sort of like a local domain name. Is this possible at all? Any pointers would be great. 回答1: In order for the browser to resolve this custom name, you will need to add an alias to your /etc/hosts file. It probably already contains a line about 127.0.0.1, in which case you just add your alias to the list 127.0.0.1 localhost localhost

Changing Cookie Domains

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问题 I use apache as a proxy to my application web server and would like to on the fly, change the domain name associated with a sessionid cookie. The cookie has a .company.com domain associated with it, and I would like using apache mod rewrite (or some similar module), transparently change the domain to app.company.com. Is this possible ? and if so, how would one go about it ? 回答1: You can only change the domain of a cookie on the client, or when it's being set on the server . Once a cookie has

Linux中的NTP和DNS服务

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NTP时间服务器作用：：ntp主要是用于对计算机的时间同步管理操作。部署一个服务器端和一个客户端服务器端：第一步：关防火墙 [root@ken ~]# systemctl stop firewalld [root@ken ~]# setenforce 0 第二步：下载ntp(服务器端操作) [root@ken ~]# yum install ntp -y 第三步：配置NTP [root@ken ~]# vim /etc/ntp.conf server 127.127.1.0 server time1.aliyun.com #可加可不加 restrict 127.0.0.1 restrict 192.168.64.5 mask 255.255.255.0 第四步：重启ntpd服务 [root@ken ~]# systemctl restart ntpd 第五步：查看ntp状态 [root@ken ~]# ntpstat synchronised to local net at stratum 6 time correct to within 7948 ms polling server every 64 s 客户端：第六步：客户端下载ntpdate(用来同步时间的命令行工具) [root@ken ~]# yum install ntpdate -y 第七步

DNS & bind从基础到深入

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本链接转载自： https://www.cnblogs.com/f-ck-need-u/p/7367503.html 仅供自学使用。 DNS是Domain name system的简称，有些地方也称为Domain name server，这东西是一个很大的话题。如果不是要配置DNS服务，只需要理解DNS的解析流程和DNS有关的基本知识即可。如果要配置DNS服务，则可以看完全文。推荐阅读书籍：《DNS & bind》，第四版有中文版，第五版目前只有英文版。 7.1 DNS必懂基础 DNS主要是用于将域名解析为IP地址的协议，有时候也用于将IP地址反向解析成域名，所以DNS可以实现双向解析。 DNS可以使用TCP和UDP的53端口，基本使用UDP协议的53端口。 7.1.1 域的分类域是分层管理的，就像中国的行政级别。最高层的域是根域(root)"."，就是一个点，它就像国家主席一样。全球只有13个根域服务器，基本上都在美国，中国一台根域服务器都没有。根域的下一层就是第二层次的顶级域（TLD）了，那么它就是各省省长了。顶级域一般两种划分方法：按国家划分和按组织性质划分。 ◇ 按国家划分：.cn(中国)、.tw(台湾)、.hk(香港)。基本都是两个字母的。 ◇ 按组织性质划分：.org、.net、.com、.edu、.gov、.cc等。 ◇ 反向域：arpa

How can I use Jekyll with my domain, but hosted on GitHub?

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问题 I would like to switch from WordPress to Jekyll. I already have migrated the articles (see new Jekyll articles + rendered page and old WordPress site). Now I would like to have the old URLs: Old URL : http://martin-thoma.com/word-error-rate-calculation/ Current new URL: http://martinthoma.github.io/word-error-rate-calculation/ So this question is really only about the top level domain. My provider (called "Knallhart") should only "hold" the domain martin-thoma.com (GitHub does not offer this,

How can I use Jekyll with my domain, but hosted on GitHub?

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Using glibc, why does my gethostbyname fail after I/DHCP has changed the DNS server?

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问题 If our server (running on a device) starts before a DHCP lease had been acquired then it can never connect using a hostname. If that happens it can find hosts by IP address but not by DNS. I initially thought that the Curl DNS cache was at fault as the curl connections failed. But I used CURLOPT_DNS_CACHE_TIMEOUT to prevent curl from caching address but connections still failed. 回答1: It turns out that glibc gethostbyname_r won't automatically reload it's configuration if that configuration

virtual hosts DocumentRoot not being changed

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问题 Don't think my virtualhost is working correctly. This is what I have inside of httpd.conf...it is the last thing in the file: NameVirtualHost *:80 <VirtualHost *:80> DocumentRoot /var/www/html/testing ServerName testing.aa.local </VirtualHost> In my /etc/hosts file: 127.0.0.1 testing.aa.local Now when I go to testing.aa.local it shows the index page of the root of the site. In httpd.conf the document root is DocumentRoot /var/www/html . It appears it is taking that document root and not the