Hi. I moved almost all of my squid to authentication schemes using ext_kerberos_ldap_group_acl, and, though they do work OK, I'm not entirely happy with their performance. ext_ldap_group_acl is like speed of light fast comparing to ext_kerberos_ldap_group_acl. The most lag (around 0.5 sec) happens, from my observation, between these two lines: [...] support_krb5.cc(267): pid=53166 :2013/09/03 18:52:45| kerberos_ldap_group: DEBUG: Got principal name HTTP/proxy1.norma.com@xxxxxxxxx support_krb5.cc(311): pid=53166 :2013/09/03 18:52:46| kerberos_ldap_group: DEBUG: Stored credentials [...] Is there any way to speed this up ? I've reread the documentation, but without result. Is there any cache that could be used ? I understand that kerberos group helper is way more complicated than the pure ldap one, but still, having this pause on each group membership checking is sad. Thanks. Eugene.