Šimon, According to [1] oVirt should be accessible through IPv6 address. IPv6 address in a browser. Please notice that an IPv6 literal address (not a hostname that resolves to an IPv6 address) in a valid URL should be wrapped by brackets, e.g. http:// [1::2]:80/path. You can verify that the engine listens to an IPv6 by running the following command from the Linux console of the host that runs ovirt-engine (while ovirt-engine service runs): netstat -lnp6 | grep <port> where <port> is the port ovirt-engine should be listening to and be accessed through (default is 80). It seems to me like a problem on ManageIQ side. Please let me know if you need further assistance. Regards, Yevgeny [1] https://bugzilla.redhat.com/show_bug.cgi?id=1310837 On Fri, Mar 3, 2017 at 4:55 PM, Šimon <simi(a)mykolab.com&gt; wrote: