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Questions tagged [subdomain]

In the Domain Name System (DNS) hierarchy, a subdomain is a domain that is part of a larger domain.[1]

The Domain Name System has a tree structure or hierarchy, with each node on the tree being a domain name. A subdomain is a domain that is part of a larger domain, the only domain that is not also a subdomain is the root domain.

For example, mail.example.com and calendar.example.com are subdomains of the example.com domain, which in turn is a subdomain of the com top-level domain (TLD).

A "subdomain" expresses relative dependence, not absolute dependence: for example, wikipedia.org comprises a subdomain of the org domain, and en.wikipedia.org comprises a subdomain of the domain wikipedia.org.

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Are DNS records private information?

Assuming you wanted to create a subdomain that points to a private location (perhaps the location of a database, or the IP address of a computer you don't want people to attempt SSH-ing into), so you add a DNS record named something like…
IQAndreas
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How to create an SSL certificate for more than one subdomain?

I'm running a server "myserver.net", which has the subdomains "a.myserver.net" and "b.myserver.net". When creating (self-signed) SSL certificates, I have to create one for every subdomain, containing the FQDN, even though those subdomains are just…
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How many sub-domains can there be at most?

Is there a limit for number of subdomains like "*.domain.com"?
Shore
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nginx proxy subdomains to other addresses and ports

I'm newbie with nginx, but I need to create some proxy rules based on the subdomain to redirect to another IP and Port. This is my case: My domain.com has IP y.y.y.y and accepts requests on port 80 My subdomains are: - admin.domain.com -> I need to…
Beto Neto
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Setting up SPF and DKIM records of a subdomain

I need to setup SPK and DKIM record for mail.mydomain.com. I have set the following at namecheap - For SPF - Record type :TXT Hostname : mail.mydomain.com Value : v=spf1 ip4:x.x.x.x ~all For DKIM - Record type : TXT Host :…
Aditya Singh
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How can I determine whether xyz.example.com uses a wildcard A record?

If you have many sub-domain names like xxx.example.com, xyz.example.com etc, you can solve these through server-side scripting or other means by using a wildcard A record for *.example.com in your DNS. How can I determine whether a wildcard domain…
Abel
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Is it OK to use local. in an active directory domain name

I have read that it's not OK to use .local in a domain especially with Microsoft Windows servers. I have also read the Windows Active Directory naming best practices article on ServerFault which was helpful but hadn't completely answered my…
Kevin Boucher
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Should engineering have its own DNS zone, delegate, or subdomain?

We have our organization's primary domain (with AD) example.com. In the past, previous admins have created several other zones - such as dmn.com, lab.example.com, dmn-geo.com etc - as well as subdomains and delegates all of which are for different…
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Benefits of using a subdomain for sending email?

Assume I own the domain name, example.org. I am creating a setup where I receive email sent to me@example.org using Google Apps. The MX records for example.org already point to Google's servers and it works great. Now, I have an application server…
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Can I use the character ñ in a sub-domain?

We are launching our website in Spanish and are probably going to call it espanol.mydomain.com Since the real spelling is español, ideally we would allow people to type español.mydomain.com. Is that something that is possible today? Can we use this…
nute
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Wildcard DNS and subdomains

Let's that I've got the domain mydomain.com. I want that when any visitor goes to www.mydomain.com xyz.mydomain.com abc.mydomain.com asd.mydomain.com qwe.mydomain.com etc... the visitor will continue seeing "xyz.mydomain.com", but the real address…
Click Ok
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How to access a subdomain of an IP address?

I have a website that is accessible only by IP address. How can I access a subdomain of that website?
Nathan Osman
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SSH home directory per subdomain

I'm wondering if it is possible to set different home directories for the same ssh user for each subdomain. So let's say you login with ssh myuser@example.com your home directory will be: /www/httpdocs/ If you login with ssh…
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exclude a subdomain from a dns wildcard record

I have a domain name set with wildcard for all subdomain (*.mydomain.com), I need of exclude a specific subdomain from this condition, I use a record dns for set wildcard and if I set a new record A for a specific subdomain it not work
Alessio D'Annibale
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Second Level Subdomain DNS Wildcard

I need help setting up a second level subdomain. I have set up wildcard subdomains in the past with success, but I am having trouble with the DNS entry for this one. I need to do something like *.design.mydomain.com So I tried to create an A record…
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