diff --git a/debian/jail.conf b/debian/jail.conf
index 59fae718..448e34fc 100644
--- a/debian/jail.conf
+++ b/debian/jail.conf
@@ -33,6 +33,16 @@ maxretry = 3
 #            pyinotify, gamin, polling.
 backend = auto
 
+# "usedns" 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.
+usedns = warn
+
 #
 # Destination email address used solely for the interpolations in
 # jail.{conf,local} configuration files.