OT?: Restrict SPNEGO in IE

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  • Last Post 01 February 2012
gabriel/tfi posted this 01 February 2012

We have a requirement to run Sharepoint within the Trusted Sites in IE and so we need to enable “Automatic logon with current user name and password” over Trusted Sites to achieve SSO.

Trusted Sites contains other web sites we would NOT like to engage a SPNEGO with. Is there a way to restrict SPNEGO to a “white list” of sites within the Trusted Site zone?

Something like the Firefox option network.negotiate-auth.trusted-uris, network.negotiate-auth.delegation-uris, "network.automatic-ntlm-auth.trusted-uris".

https://developer.mozilla.org/en/IntegratedAuthentication



I understand the Trusted Site zone is a white-list per-se, but not all trusted sites are equal (especially if we need to put our Sharepoint into it!).



Thanks - Gabriele.


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lovesouthafrica posted this 01 February 2012

Hi Gabriele

Have you considered going the Kerberos route rather than NTLM? Is this SPS 2010?

Regards
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CrawfordS posted this 01 February 2012

Wouldn’t it be nice if ie allowed you to have more than 4 security zones?

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ken posted this 01 February 2012

Apologies – what are you trying to do here?

Restrict the sites with “automatic logon with current username and password”? I don’t think that’s an SPNEGO issue.
Or do you want to prevent NTLM (or Kerberos) from being used with certain sites (which is SPNEGO)

Also, why does SharePoint have to be in Trusted Sites to start with? I’m guessing this is a Lync/SharePoint integration issue.

Cheers
Ken

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gabriel/tfi posted this 01 February 2012

Yes, Lync/SharePoint integration requires Sharepoint URL being added to the Trusted Sites zone, because Sharepoint is there “Automatic logon with current user name and password” has to be enabled on Trusted Sites to allow SSO (by IE default SSO/AutomaticLogon is enabled over Local Intranet zone only).

I would like to enable IE AutomaticLogon for Sharepoint site(s) only, while for other Trusted Sites (mostly Internet sites) AutomaticLogon should be disabled.



In a few words I would like to keep “Automatic logon with current user name and password” disabled over Trusted Sites, add Sharepoint sites into Trusted Sites and have “Automatic Logon…” enabled just for Sharepoint Sites (“white list”).

I don’t want to restrict SPNEGO to a specific authN mechanism/protocol NTLM vs Kerb.



Thanks – Gabriele.

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kamleshap posted this 01 February 2012

If you are only worried about "Automatic login", is there any reason, you
can't put them in local intranet sites?

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Argue for your limitations, and sure enough, they're yours.
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sivasankar_33 posted this 01 February 2012

Hello Ken,

I dont have an suggestion for your issue, but the concept you have explained
is really cool.

Can you provide me a link where i can start from scratch on IIIS. i am new
to AD and Win server :)

Thanks a lot.

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