diff --git a/ad-auth/templates/krb5.conf.j2 b/ad-auth/templates/krb5.conf.j2
index 8644b560f850a13ae40afaa61585c4e0c6010fe8..1bb1f543e74727003c361c92c78944cda866f712 100644
--- a/ad-auth/templates/krb5.conf.j2
+++ b/ad-auth/templates/krb5.conf.j2
@@ -3,6 +3,7 @@ default_realm = {{ domain.upper() }}
 dns_lookup_realm = false
 dns_lookup_kdc = true
 forwardable = true
+rdns = false
 
 [domain_realm]
 .{{ domain }} = {{ domain.upper() }}