pam_krb5 against w2k3 very slow?

[Tobias Schenk]

Hi,

we connected a linux box with w2k3 and installed pam_krb5 for sshd. In
principle it works but it takes about 10sec to authenticate?! The
servers work in a test environment means basically no load. 
The krb5 installation is heimdal 0.61 but I dont know if this really
has do with the pam_krb5.so library. 
Is this behavior common or can it be sped up?

Thanks for any comments,

Tobias