Setspn in Spnego for hostname alias

Hello everybody,

We were having NTLM setup on our EP 7.0 using IISproxy.

Also we access the portal using a url which is a DNS alias for

the actual portal hostname. i.e. the the url is like http://aliashost.domain.com/irj/portal.

Now due to some problems the proxy stopped working and

now we have to access portal as http://aliashost.domain.com:50000/irj/portal.

Also users have to input credentials manually to login.

It seems like spnego is the recommemded method for Windows SSO now.I have gone through the documentation and have a doubt now regarding the initial step for spnego.

Is this the only additional step We have to run for the setspn with regards to the additional DNS record.(2 times)

setspn -a http/portalhostname.domain.com <service-user>

setspn -a http/aliashostname.domain.com <service user>

Would the ktpass commands all be same with respect to the hostname itself?Would everything else be as per the documentation?

Thank You and best regards