Alias one set of Subdomains to another

Posted by Schneems on Server Fault See other posts from Server Fault or by Schneems
Published on 2012-11-09T22:45:49Z Indexed on 2012/11/09 23:03 UTC
Read the original article Hit count: 148

Filed under:

dns

|

cname-record

I have to domains that I want to effectively mirror one another on select subdomains. Let's say they are pirates.com and ninjas.com and i want ninjas to mirror the content on pirates.

When I visit foo.ninjas.com I want to see the content on foo.pirates.com. Due to app restrictions I need to do this in DNS for an undefined number of subdomains. I was under the impression i could do this with a CNAME, but it appears that setting a CNAME for * subdomain of the ninjas.com domain to point to pirates.com will make any subdomain of ninjas.com point at pirates.com instead of the associated subdomain. I.e. foo.ninjas.com would reference pirates.com instead of foo.pirates.com.

Is there a way to do this using DNS? Am I missing something basic?

© Server Fault or respective owner

Related posts about dns

Master/Slave DNS setup vs. rsync'ed DNS servers

as seen on Server Fault - Search for 'Server Fault'
We currently have primary and secondary DNS servers on our corporate network. They are setup in a master/slave type setup, where the slave gets its DNS information from the master. I'm trying to figure out what the real advantage is for the master/slave setup instead of just setting up an automated… >>> More
Updating Windows DNS records from a remote windows DNS server

as seen on Server Fault - Search for 'Server Fault'
Does anyone know if it is possible for a windows 2003 DNS server to update the records for a domain so that it contains all the records of a domain of of a remotely based DNS server? Im almost certain that doesn't quite explain the problem so I shall illustrate with an example: We have two offices… >>> More
OpenVPN DNS: VPN DNS stomping local VPN

as seen on Super User - Search for 'Super User'
I've finally noodled with OpenVPN enough to get it working. Even better, I can mount samba drives, ping network machines through the TUN device, etc - it's all great. However, I'm noticing that if I have the directive: push "dhcp-option DNS 10.0.1.1" # Push our local DNS to clients Then some of… >>> More
Random DNS Client Issue with BIND9/Windows Server 2003 DNS

as seen on Stack Overflow - Search for 'Stack Overflow'
Within our office, we have a local server running DNS, for internal related "domains", (e.g. .internal, .office, .lan, .vpn, etc.). Randomly, only the hosts configured with those extensions will stop resolving on the Windows-based workstations. Sometimes it'll work for a couple weeks without issue… >>> More
DNS Tools - DNS and Few of its Concerning Terms and Tools

as seen on Article City - Search for 'Article City'
A DNS or Domain Name System lets you locate computers on a network or the Internet TCP/IP network by domain name. The DNS server sustains a database of domain names or host names along with their cor... [Author: Daisy Osbaldo - Computers and Internet - April 02, 2010] >>> More

Related posts about cname-record

Wildcard 'A' record overriding CNAME record

as seen on Server Fault - Search for 'Server Fault'
I have a Wildcard * A record for self-registration of subdomains by users on our web app. All works fine. I now need to set up an alias for support.mydomain.com to point to mydomain.freshdesk.com. I created a CNAME record as per instructions however it appears my Wildcard A record is overriding… >>> More
How to set up the CNAME in DNS zone record to work with Unbounce

as seen on Server Fault - Search for 'Server Fault'
I'm trying to run split testing on some landing pages I "designed" with Unbounce, but it requires that I set the CNAME record for my domain/sub-domain and I'm having trouble figuring out what is the right way to do it. My host is arvixe (www.arvixe.com) and their customer support has failed to help… >>> More
www a-record vs cname-record

as seen on Server Fault - Search for 'Server Fault'
Hi! I have a website that I will be hosting DNS for (testing purposes at first and then it will have some limited traffic). I have set up DNS so that site.tld has an A record to the actual IP but I don't know what to do about www.site.tld. Both site.tld and www.site.tld will point to the same server… >>> More
CNAME Record in .htaccess file: correct format?

as seen on Stack Overflow - Search for 'Stack Overflow'
In my .htaccess file, I have set up several A records in the following structure: RewriteCond %{HTTP_HOST} ^domain.com$ [OR] RewriteCond %{HTTP_HOST} ^www.domain.com$ RewriteRule ^substring\/substring\/etc?$ "http\:\/\/domain\.com\/newsubstring\/etc\/" [R=301,L] Is is possible to easily set up… >>> More
Amazon ELB CNAME record not working

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi there, I have set up my EC2 infrastructure behind an ELB instance and by using the ELBs DNS name everything works as expected. Now i wanted to forward a subdomain of my main project domain to the ELBs DNS Name with a CNAME entry. I did this about 12 hours ago and it doesnt seem to work, and i… >>> More