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When we open our site in IE using the host name (which is resolved through a local dns server that responds with an ipv6 address) we cannot open the site. It comes up with a login popup for the domain credentials. It seems like the credentials cannot be resolved.

When we use the ipv4 address of the server directly in IE, it all works fine.

The site runs under IIS 7.5 with windows authentication turned on, all other forms of authentication turned off. Since the server is part of our customers network I don't have much more details about the network setup (dns, firewalls etc)

Why doesn't it work when using ipv6, it seems like an IIS issue?

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migrated from superuser.com Aug 13 '12 at 19:32

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Is the reverse DNS for the IPv4 and IPv6 addresses different? –  grawity Aug 13 '12 at 16:29
    
i'm not sure, worth finding out asap –  Thomas Aug 13 '12 at 18:20

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