LoadModule auth_kerb_module modules/mod_auth_kerb.so LoadModule authnz_pam_module modules/mod_authnz_pam.so AuthType Kerberos AuthName "Kerberos Login" KrbMethodNegotiate On KrbMethodK5Passwd Off KrbAuthRealms EXAMPLE.COM Krb5KeyTab /etc/http.keytab require pam-account wikiapp ErrorDocument 401 'Kerberos authentication did not pass.'