Questions tagged [subdomain]
Subdomain is a domain which is a part of a larger domain. For example, 'sub.example.com' is subdomain of 'example.com' domain.
subdomain
5,799
questions
735
votes
6
answers
601k
views
Share cookies between subdomain and domain
I have two questions. I understand that if I specify the domain as .example.com (with the leading dot) in the cookie that all subdomains can share a cookie.
Can subdomain.example.com access a cookie ...
- 30k
283
votes
8
answers
632k
views
How do I get a list of all subdomains of a domain? [closed]
I want to find out all the subdomains of a given domain. I found a hint which tells me to dig the authoritative Nameserver with the following option:
dig @ns1.foo.example example.com axfr
But this ...
- 2,949
282
votes
12
answers
205k
views
Can (domain name) subdomains have an underscore "_" in it?
Can subdomains (domain names) have underscore _ in them?
- 24.5k
266
votes
33
answers
469k
views
"Could not get any response" response when using postman with subdomain
I am using postman to test an API I have, all is good when the request does not contain sub-domain, however when I add a sub-domain to URL I am getting this response.
Could not get any response
...
- 8,933
176
votes
12
answers
151k
views
How to let PHP to create subdomain automatically for each user?
How do I create subdomain like http://user.mywebsite.example? Do I have to access .htaccess somehow? Is it actually simply possible to create it via pure PHP code or I need to use some external script-...
- 5,852
175
votes
10
answers
73k
views
When should one use a 'www' subdomain?
When browsing through the internet for the last few years, I'm seeing more and more pages getting rid of the 'www' subdomain.
Are there any good reasons to use or not to use the 'www' subdomain?
- 17.9k
160
votes
8
answers
193k
views
Use localStorage across subdomains
I'm replacing cookies with localStorage on browsers that can support it (anyone but IE). The problem is site.example and www.site.example store their own separate localStorage objects. I believe www ...
- 19.9k
129
votes
5
answers
182k
views
How to put wildcard entry into /etc/hosts?
I recently wanted to point all subdomains for a test domain, let's say example.com to the localhost. Is there a way to point all requests on *.example.com to resolve to 127.0.0.1
- 3,913
126
votes
29
answers
171k
views
PHP function to get the subdomain of a URL
Is there a function in PHP to get the name of the subdomain?
In the following example I would like to get the "en" part of the URL:
en.example.com
- 1,269
126
votes
9
answers
69k
views
Create subdomains on the fly with .htaccess (PHP)
I am looking to create a system which on signup will create a subdomain on my website for the users account area.
e.g. johndoe.website.example
I think it would be something to do with the .htaccess ...
- 3,555
125
votes
3
answers
139k
views
Subdomain on different host [closed]
I'm trying to host a subdomain for my site with a different hosting company and I'm running into issues on how to set it up.
Here are the specifics:
Domain is registered with GoDaddy.
Nameservers are ...
- 6,833
114
votes
18
answers
64k
views
Get the subdomain from a URL
Getting the subdomain from a URL sounds easy at first.
http://www.domain.example
Scan for the first period then return whatever came after the "http://" ...
Then you remember
http://super.duper....
- 10k
102
votes
4
answers
82k
views
Should I delete the cgi-bin folder in a subdomain I just created?
Using cpanel on my hosting account, I created a subdomain - e.g. www.clothing.mysite.com
A cgi-bin folder was automatically created in the directory for clothing.mysite.com. Do I need it? I'm only ...
- 1,023
94
votes
3
answers
43k
views
Rails routing to handle multiple domains on single application
I've been unable to find a workable solution to this problem, despite several similar questions here and elsewhere. It seems likely that this question hasn't been answered for Rails 3, so here goes:
...
- 5,237
90
votes
5
answers
84k
views
What are the allowed characters in a subdomain?
What characters are you allowed to use in a subdomain?
Example: for someSub.example.com the someSub portion.
I know you can use letters, numbers, and hyphens, but what about other characters? Can _ ...
- 911
89
votes
9
answers
231k
views
.htaccess rewrite subdomain to directory
Is it possible to use .htaccess to rewrite a sub domain to a directory?
Example:
http://sub.domain.example/
shows the content of
http://domain.example/subdomains/sub/
- 1,197
87
votes
6
answers
141k
views
nginx - two subdomain configuration
I'm new to Nginx and I'm trying to get subdomains working.
What I would like to do is take my domain (let's call it example.com) and add:
sub1.example.com,
sub2.example.com, and also have
www....
- 1,115
86
votes
3
answers
133k
views
Virtualhost For Wildcard Subdomain and Static Subdomain
I have an odd situation where I want to have the URLs app1.example.com, example.com and *.example.com all using a different virtual host. This is what I have (excluding example.com because it just ...
- 1,668
85
votes
3
answers
23k
views
Multiple GitHub Pages and custom domains via DNS
I want to have one user page and multiple project pages hosted by GitHub Pages but available under ONE custom domain (with subdomains for each GitHub Pages repository, of course). So my goals are as ...
- 3,942
82
votes
6
answers
47k
views
Amazon S3: Static Web Sites: Custom Domain or Subdomain
Amazon.com just announced that one can host static web sites in a S3 bucket. I went to their setup page at http://docs.amazonwebservices.com/AmazonS3/latest/dev/index.html?WebsiteHosting.html and ...
- 15.3k
82
votes
1
answer
131k
views
Nginx subdomain configuration
I have nginx acting as a reverse proxy to apache. I now need to add a new subdomain
that will serve files from another directory, but at the same time I want all location and proxy_pass directives ...
- 4,671
80
votes
4
answers
149k
views
How to set up subdomains on IIS 7
I have a website sitting on an IIS 7 server:
WWW.example.COM
I would like to create several sub domains that looks like
SUBDOMAIN1.example.COM
I created an IIS website and I set the bindings to be
...
- 1,053
80
votes
5
answers
81k
views
HTML5 localStorage size limit for subdomains
HTML5's localStorage databases are usually size-limited — standard sizes are 5 or 10 MB per domain. Can these limits be circumvented by subdomains (e.g. example.com, hack1.example.com and hack2....
- 236k
70
votes
4
answers
67k
views
SSL Multilevel Subdomain Wildcard
I bought a wildcard certificate for *.example.com. Now, I have to secure *.subdomain.example.com. Is it possible to create a sub-certificate for my wildcard-certificate?
If it is, how I can do this?
- 733
70
votes
4
answers
55k
views
Should I use an A record or a CNAME for a wildcard subdomain?
Some people are saying use an A record and others a CNAME for a catch all subdomain.
Which should I use and why?
- 1,281
67
votes
6
answers
71k
views
How can I configure multiple sub domains in Express.js or Connect.js
I am used to working on httpd ( Apache ) which provides a way to configure subdomains which is mapped to a directory.
How can I do the same thing in Connect.js/Express.js ? I see that the only thing ...
- 1,743
65
votes
5
answers
29k
views
What does Rails 3 session_store domain :all really do?
Updated question to make it more clear
I understand that you can set the domain of your session_store to share sessions between subdomains like this: Rails.application.config.session_store :...
- 5,563
63
votes
4
answers
23k
views
Rails rspec set subdomain
I am using rSpec for testing my application. In my application controller I have a method like so:
def set_current_account
@current_account ||= Account.find_by_subdomain(request.subdomains.first)
...
- 20.3k
63
votes
4
answers
69k
views
Can HTML5 databases and localStorage be shared across subdomains?
I am attempting to share data across subdomains using Safari. I would like to use an HTML5 database (specifically localStorage as my data is nothing but key-value pairs).
However, it seems as though ...
- 12.2k
59
votes
2
answers
95k
views
Wildcard subdomains with dnsmasq
I have a device that is already mapped to domain.tld. I now want to create a wildcard for all subdomains *.domain.tld so that they are mapped to the ip of domain.tld, too.
How do I do this with ...
- 593
55
votes
3
answers
93k
views
Domain IP address for www and non-www for Canonical URL
To handle Canonical URL is it best practice to do a 301 redirect or better to have the same IP Address for both www and non www domain?
For example:
Canonical URL/domain wanted is http://example.com
...
- 3,553
55
votes
2
answers
17k
views
Why use subdomains to designate tenants in a multi-tenant web application?
Questions
Why do some multi-tenant web applications use subdomains to designate the tenant while others do not?
Are there technical, privacy, or security reasons?
Is it dependent on the language or ...
- 461k
54
votes
10
answers
17k
views
subdomain vs. subdirectory in web programming
There are two main strategies for handling multiple "applications" on the web:
subdomains (e.g. wiki.example.org, blog.example.org, admin.example.org, api.example.org/v1)
subdirs (e.g. example.org/...
53
votes
17
answers
21k
views
Public Wildcard Domain Name To Resolve To 127.0.0.1 [closed]
Is anyone aware of a public wildcard domain name that resolves to IP address 127.0.0.1. For example if I wanted to test a URL locally such as mywebsite.localhost.com or example.localhost.com but I ...
user189422
51
votes
1
answer
20k
views
Subdomain of website for Github pages project
I have a Github project, github.com/jeti/matrix, and I set up a "Github pages" site for the project so that it is accessible here jeti.github.io/matrix/.
That is all configurable through Github.
...
- 7,142
50
votes
1
answer
43k
views
How do I get my computer's fully qualified domain name in Python?
I know I can use platform.node() to get my computer's network name:
>>> import platform
>>> platform.node()
'MyComputerName'
But what I really want is something that will work ...
- 12.1k
49
votes
2
answers
32k
views
How do I make a custom subdomain on Firebase?
I have purchased a domain ("www.mydomain.com"). How do I make a subdomain on Firebase ("sub.mydomain.com"), if I am using Firebase hosting?
- 491
46
votes
4
answers
48k
views
How to test nginx subdomains on localhost
I want to test nginx subdomains before uploading config to the server. Can i test it on localhost? I try
server {
listen 80;
server_name localhost;
location / {
proxy_pass ...
- 32.5k
45
votes
1
answer
33k
views
Can subdomain.example.com set a cookie that can be read by example.com?
I simply cannot believe this is quite so hard to determine.
Even having read the RFCs, it's not clear to me if a server at subdomain.example.com can set a cookie that can be read by example.com.
...
- 2,062
42
votes
4
answers
19k
views
Heroku + node.js: I have a server which uses multiple ports. How can I get Heroku to allocate them?
Umm I'll try to be more clear..
In an application server I have written in node.js, I have inner-proxy for multiple ports:
in my 8080 port I have my rest api.
in my 3000 port I have my push server ...
- 933
40
votes
7
answers
148k
views
Regular Expression - Extract subdomain & domain
I'm trying to form a regular expression (javascript/node.js) which will extract the sub-domain & domain part from any given URL. This is what I ended up with:
[^(?:http:\/\/|www\.|https:\/\/)]([^\...
- 871
40
votes
2
answers
25k
views
Dynamic Subdomain Handling in a Web App (Flask) [closed]
I'm going to be using flask to create a web application, and part of the application will involve a subdomain (for example, user1.appname.org).
I'm not sure how to go about creating these subdomains ...
- 511
40
votes
7
answers
59k
views
Why ww2 sub domains? [closed]
I have seen on the web some domain names having prefix of ww2 or ww3 or so (ww2.somedomain.example, ww3.yourdomain.example). And these happen mostly when traveling from a page to page. What would be ...
- 9,451
40
votes
3
answers
21k
views
Does a session cookie on different subdomain count as 3rd-party?
Suppose I have a site at www.example.com which has an IFRAME pointing to ASP.NET site myapp.othersite.com - this causes issues with session and 3rd-party cookies which I understand.
If I moved the ...
- 575
37
votes
4
answers
9k
views
How can I programmatically generate Heroku-like subdomain names?
We've all seen the interesting subdomains that you get automatically assigned when you deploy an app to Heroku with a bare "heroku create".
Some examples: blazing-mist-4652, electric-night-4641, ...
- 650
37
votes
7
answers
44k
views
Get the domain name of the subdomain Javascript
How i can get the domain name example.com from the set of possible subdomains sub1.example.com sub2.example.com sub3.example.com using javascript ...?
- 1,210
37
votes
9
answers
27k
views
Javascript Redirect with Google Analytics
I need help figuring out how to successfully redirect while including Analytics code.
I have a subdomain setup http://buuf.fractalsystems.org
The subdomain is actually just a subfolder http://...
- 7,742
37
votes
6
answers
101k
views
Domain doesn't work without `www`
When I type in my domain name like without the www (like http://example.com), it doesn't work and gives error message. However, when I add the www to it (like http://www.example.com), it works.
Isn't ...
- 4,427
36
votes
1
answer
47k
views
Creating subdomains in Amazon EC2
How can I create subdomains on Amazon EC2?
Is adding virtual host in httpd.conf is enough.. or any other changes also needs to be done?
Thanks
- 624
36
votes
1
answer
19k
views
Nginx convert subdomain to path component without redirect
The idea is to take incoming requests to http://abc.example.com/... and rewrite them to http://example.com/abc/...
That's easy enough to do with a 301/302 redirect:
# rewrite via 301 Moved ...
- 1,695