How to redirect siteA to siteB with A or CNAME records

Question

I have 2 hosts and I would like to point a subdomain on host one to a subdomain on host two   subdomain hostone com -- gt  subdomain hosttwo com   I added a CNAME record to host one that points to subdomain hosttwo com but all I get is a  400 Bad Request  Error   Can anyone see what I m doing wrong

User · Answer

It sounds like the web server on hosttwo com doesn t allow undefined domains to be passed through   You also said you wanted to do a redirect  this isn t actually a method for redirecting   If you bought this domain through GoDaddy you may just want to use their redirection service

User · Answer

You can only make DNS name pont to a different IP address  so if You you are using virtual hosts redirecting with DNS won t work   When you enter subdomain hostone com in your browser it will use DNS to get it s IP address  if it s a CNAME it will continue trying until it gets IP from A record  then it will connect to that IP and send a http request with   Host  subdomain hostone com   somewhere in the http headers

User · Answer

You can do this a number of non-DNS ways   The landing page at subdomain hostone com can have an HTTP redirect   The webserver at hostone com can be configured to redirect  easy in Apache  not sure about IIS   etc

User · Answer

It s probably best easiest to set up a 301 redirect  No DNS hacking required

User · Answer

Try changing it to  subdomain -  subdomain hosttwo com   The CNAME is an alias for a certain domain  so when you go to the control panel for hostone com  you shouldn t have to enter the whole name into the CNAME alias   As far as the error you are getting  can you log onto subdomain hostwo com and check the logs

User · Answer

I think several of the answers hit around the possible solution to your problem   I agree the easiest  and best solution for SEO purposes  is the 301 redirect   In IIS this is fairly trivial  you d create a site for subdomain hostone com  after creating the site  right-click on the site and go into properties   Click on the  Home Directory  tab of the site properties window that opens  Select the radio button  A redirection to a URL   enter the url for the new site  http   subdomain hosttwo com   and check the checkboxes for  The exact URL entered above    A permanent redirection for this resource   this second checkbox causes a 301 redirect  instead of a 302 redirect    Click OK  and you re done   Or you could create a page on the site of http   subdomain hostone com  using one of the following methods  depending on what the hosting platform supports   PHP Redirect     lt   Header   HTTP 1 1 301 Moved Permanently      Header   Location  http   subdomain hosttwo com        gt    ASP Redirect     lt    Language VBScript   gt   lt   Response Status  301 Moved Permanently  Response AddHeader  Location   http   subdomain hosttwo com    gt    ASP  NET Redirect     lt script runat  server  gt  private void Page Load object sender  System EventArgs e    Response Status    301 Moved Permanently   Response AddHeader  Location   http   subdomain hosttwo com       lt  script gt    Now assuming your CNAME record is correctly created  then the only problem you are experiencing is that the site created for http   subdomain hosttwo com is using a shared IP  and host headers to determine which site should be displayed   To resolve this issue under IIS  in IIS Manager on the web server  you d right-click on the site for subdomain hosttwo com  and click  Properties    On the displayed  Web Site  tab  you should see an  Advanced  button next to the IP address that you ll need to click   On the  Advanced Web Site Identification  window that appears  click  Add    Select the same IP address that is already being used by subdomain hosttwo com  enter 80 as the TCP port  and then enter subdomain hosttwo com as the Host Header value   Click OK until you are back to the main IIS Manager window  and you should be good to go   Open a browser  and browse to http   subdomain hostone com  and you ll see the site at http   subdomain hosttwo com appear  even though your URL shows http   subdomain hostone com  Hope that helps

User · Answer

These days  many site owners are using CDN services which pulls data from CDN server  If that s your case then you are left with two options    Create a subdomain and edit DNS by Adding a CNAME record Don t create a subdomain but only create a CNAME record pointing back to your temporary DNS URL    This solution only implies to pulling code from CDN which will show that it s fetching data from cdn sitename com but practically its pulling from your CDN host

[dns] How to redirect siteA to siteB with A or CNAME records

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