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How many bindings will IIS 7.5 support on one web site ?

To make sure my question is understand correctly.

  • I know i can put multiple website on the same server.
  • I know i can put multiple website on the same IP
  • I know i can put multiple binding on the same website

My questions is, it's there a limit of binding on the same web site.

Supose i get something like

  • www.serverfault.com
  • serverfault.com
  • m.serverfault.com
  • a.serverfault.com
  • b.serverfault.com etc..

On the same web site binding ....

Cédric Boivin
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    Unlimited? As in: more as you need. – mailq Dec 12 '11 at 15:55
  • possible duplicate of [Is there a limit to how many sites can be hosted on a single IP address when using HTTP Host Headers on Windows 2008?](http://serverfault.com/questions/219882/is-there-a-limit-to-how-many-sites-can-be-hosted-on-a-single-ip-address-when-usi) – mailq Dec 12 '11 at 15:58
  • @mailq i think your right, look the same questions ... thanks – Cédric Boivin Dec 16 '11 at 14:48

3 Answers3

1

If you are using kernel-mode authentication, the limit is 64 bindings (Confirmed with Microsoft). I have tested it. It fails (401.2 error) if I add 65 or more bindings.

I am not aware of any limitation if you use user-mode authentication.

More information: IIS binding limit (401.2 Windows Authentication error)

Ned
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In theory the maximum number of bindings per site is 65535 (the total number of ports available, period), minus, of course, any ports otherwise in use on the system (i.e. 25, 110, 3389, etc).

Now, what you'd need with 65k ports bound to the same site is beyond me. Mailq's reference to the How Many Sites question may be more what you want to know.

Community
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Driftpeasant
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    @Driftpesant, why it's limited by the number of port ? It's suppose to be only a validation on the header of the HTTP request no ? – Cédric Boivin Dec 16 '11 at 14:46
  • In this case @CédricBoivin is right. Binding in IIS is not what you normally expect by the word "binding". MS is stupid in this case. – mailq Dec 16 '11 at 18:32
  • Actually no - binding in IIS means exactly this. It is just - due to http - not as primitive / limited as a pure port binding. – TomTom Nov 26 '13 at 18:28
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I'd say that the limit to bindings should practically be dependant on how large applicationHost.config can be: MS reference

TomTom
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Robert
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  • This is only true for IIS6 and older versions (in which there was an actual limit of 1024 endpoints bound). In IIS 7.0 and above, site bindings are stored in `applicationHost.config` – Mathias R. Jessen Jan 31 '14 at 15:41