Forms authentication doesnt work when a fully qualified domain name is used

Question

localhost works computername works computername.fullyqualify.com does not work. IP address works.

It ends up going in a loop between redirecting between the login and the main page.

It is almost as though the cookie is not being written.

Is there an IIS or active directory setting that I need to change here?

Hi, does this help? http://stackoverflow.com/questions/2453677/single-sign-on-with-forms-authentication — Davide Piras, Feb 24 '11 at 20:44
Does the `` element in your Web.config have a `domain` attribute? — Carson63000, Feb 24 '11 at 23:53

ukhardy · Accepted Answer · 2011-02-24T20:59:18.667

1

It is DNS' job to resolve FQDNs to IPs. From IIS you specify what IP to use, from a pool of IPs assigned to your Web Server, with which site amongt many hosted on your Web Server.

Check if you have correct Canonical Name record (CNAME) entries in you AD for the desired IPs.

Also ensure that it's replicated to all DNS servers if you have load balancing in AD.

edited Feb 24 '11 at 20:59

answered Feb 24 '11 at 20:54

ukhardy

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would this cause the web.page to come up... but for forms authentication itself not to work? – Xander Feb 24 '11 at 21:38

Forms authentication doesnt work when a fully qualified domain name is used

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