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Background:

I have read an answer to the question : Which tools and technologies are used to build the Stack Exchange Network?. It is mentioned that IIS 8.0 is used as a WebServer.

Question:

In IIS, If one wants to set up subdomains, one will have to create a new website with the subdomain.

How has StackExchange addressed this issue as they have so many subdomains? Have they created these many websites using IIS like this:

http://meta.stackexchange.com

http://webapps.stackexchange.com

http://gis.stackexchange.com

http://mathematica.stackexchange.com

http://ux.stackexchange.com

1 Answer 1

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The Q&A sites are the wildcard binding in IIS (of which you can only have one), so anything hitting *:80 hits out multi-tenancy application pool. Beyond that we're looking Host header to determine which theme, database, etc. you are given on the request.

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