diff --git a/config/jail.conf b/config/jail.conf
index cdef1cb3..3b779c9c 100644
--- a/config/jail.conf
+++ b/config/jail.conf
@@ -38,6 +38,16 @@ maxretry = 3
 #              pyinotify, gamin, polling.
 backend = auto
 
+# "use_dns" specifies if jails should trust hostnames in logs,
+#   warn when reverse DNS lookups are performed, or ignore all hostnames in logs
+#
+# yes:   if a hostname is encountered, a reverse DNS lookup will be performed.
+# warn:  if a hostname is encountered, a reverse DNS lookup will be performed, 
+#        but it will be logged as a warning.
+# no:    if a hostname is encountered, will not be used for banning,
+#        but it will be logged as info.
+use_dns = warn
+
 
 # This jail corresponds to the standard configuration in Fail2ban 0.6.
 # The mail-whois action send a notification e-mail with a whois request