Hi, For our LDAP queries, we have specified the forest DNS name as the LDAP server, so that we achieve via DNS a random distribution of queries against our AD servers. Previously we had hammered the first server on the list. This has kept our AD guys happy, but we have noticed that at busy times our FR servers are doing over 100 DNS queries per second, for the same thing. I can not spot anything in the FreeRADIUS config files, but is there any way to reduce the number of DNS lookups? We are running 3.0.12 on RHEL7. Outside of FreeRADIUS, we could either make sure each server has a different /etc/hosts file, which is not ideal, or implementing local DNS caching seems to be the more sensible way to go. Are there any other alternatives other people are using? Yours Dave Hartburn