[horde] Horde 3.1.3 and Kerberos auth

[Liam Hoekenga]

> So you mean, your always prompted to give username/password at 
> login-screen and horde checks this credentials against kerberos?
> For now, this is the way I got it working. But thats not what I 
> suggested, I wanted to have a SSO without beeing asked for for 
> username/password in every modul .
>   
The kerberos authentication backend for horde is exactly that.  It 
allows the built in horde authentication to check passwords against your 
KDC.  So, you get the horde login screen, and use your kerberos username 
and password.

Which SSO are you using?  There is a shibboleth authentication backend 
for horde which you might be able to make work.  We're using CoSign and 
a modified version of the "auto" authenticator (our script should work 
with anything that sets $_SERVER['REMOTE_USER']). In both of these 
cases, they should pick up the authentication from the SSO such that 
horde's authentication is never invoked in a user visible fasion.

Liam