子域映射到另一个外部子域
我正在尝试将 help.domain1.com 映射到 help.domain2.com。 我在 UserVoice 上看到过这个。 它们允许您将 Something.yourdomain.com 映射到 Something.uservoice.com。
在domain1.com 上，我设置了一个CNAME 到help.domain2.com。
它工作正常，但是当我打开help.domain1.com时，我得到的是domain2.com而不是help.domain2.com的内容。
经过一些实验后，我意识到这是预期的行为。
所以我的问题是，当我导航 help.domain1.com 时，我必须在domain2.com（或者可能在domain1.com？）上做什么才能让它显示子域“help.domain2.com”的内容？
（我使用的是 Plesk，操作系统是 Windows Server 2003）
I'm trying to map help.domain1.com to help.domain2.com. I've seen this on UserVoice. They let you map something.yourdomain.com to something.uservoice.com.
On domain1.com I've set up a CNAME to help.domain2.com.
It works fine but when I open help.domain1.com I get the content of domain2.com instead of help.domain2.com.
After some experimenting I've realized that this is an expected behavior.
So my question is what do I have to do on domain2.com (or maybe on domain1.com?) to have it show content of subdomain "help.domain2.com" when I navigate help.domain1.com?
(I'm using Plesk and the OS is Windows Server 2003)
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在过去的几天里我遇到了同样的问题，刚刚找到了解决方案...
在 /etc/apache2/site-available/default 中，我有两个虚拟主机，第一个用于我的域，第二个用于我的域用于我的子域。 我所要做的就是颠倒虚拟主机块的顺序，将子域放在域前面，然后就成功了！ ：D
I was facing the same problem for the last couple of days, and just found the solution...
In /etc/apache2/site-available/default, I had two virtual hosts, first one was for my domain, and the second one was for my sub domain. All I had to do was reverse the order of the virtual host blocks, placing the sub domain in front of the domain, and it worked! :D
我找到了解决方案。 一种方法是在domain2.com 上使用mod_rewrite 规则，并在引荐来源网址为domain1.com 时进行重定向。 或者分配一个专用的IP地址。
I found the solution. One way would be to use a mod_rewrite rule on domain2.com and do a redirect if referrer is domain1.com. Or to assign a dedicated IP address.
如果同一 IP 地址上托管多个站点，HTTP/1.1 使用
Host:标头来确定正在请求哪个站点。您需要确保第二个（目标）Web 服务器配置为期望传入的 HTTP 请求中包含原始 URI。
HTTP/1.1 uses the
Host:header to figure out which site is being requested, should there be more than one site hosted on the same IP address.You need to ensure that the second (target) web-server is configured to expect incoming HTTP requests with the original URI in them.
我不是 100% 确定如何在 Windows 中执行此操作，但在 apache 中，您只需要设置一个虚拟主机即可将其从主域重定向到您的子域。
您没有说明您使用的是 IIS 还是 apache，也没有说明 Web 服务器是什么。
我想您需要做的是在 IIS 中设置一个新网站（不是虚拟目录），然后在网站选项卡中单击“高级”并编辑其中的条目，以便“主机标头名称”是您想要的子域。
乔恩·霍金斯
I am not 100% sure how to do this in windows but in apache you just need to setup a virtual host to redirect it from the main domain to your subdomain.
you do not say if you are using IIS or apache or what the webserver is.
I imagine that what you need to do is setup a new website in IIS (not a virtual directory) and in the website tab click on advanced and edit the entry in there so that the "host header name" is the subdomain you want.
Jon Hawkins