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New Member

Unable to Login web interface remotely - ACS 2.6 NT


I am unable to log in remotely to the admin interface for ACS, logging on locally is fine however. I can get to the login screen, and am able to supply the username and password although when I click to log in I get:

Logon failed....protocol error.

I have scoured the www and cannot find any reference to this particular issue, hence this post. I have checked the access policy for the system and there are no rules in place, i.e. it is wide open.

Any ideas?



Cisco Employee

Re: Unable to Login web interface remotely - ACS 2.6 NT

Usually stopping/starting the CSAdmin service via the Control Panel will fix this. I've seen it a couple of times over the past 2 years, so it's pretty rare and seems ot be when the CSAdmin service gets itself in a knot.

A reboot of the server might also be necessary, but usually just restarting CSAdmin will resolve it. Note that you can't stop/start the services via the GUI, cause this restarts all the services EXCEPT CSAdmin, you have to do it via Control Panel - Services.

On one occasion I've also seen it appear when the user wasn't using port 2002 in the URL. He was typing in just http://, instead of http://:2002, so make sure you're doing that.

New Member

Re: Unable to Login web interface remotely - ACS 2.6 NT

Excellent info, worked a treat, thanks very much. Perhaps someone at Cisco could create a support doc about this one?

Thanks again,