diff --git a/src/opnsense/mvc/app/library/OPNsense/Firewall/Util.php b/src/opnsense/mvc/app/library/OPNsense/Firewall/Util.php
index b469fb7e6..db8726c69 100644
--- a/src/opnsense/mvc/app/library/OPNsense/Firewall/Util.php
+++ b/src/opnsense/mvc/app/library/OPNsense/Firewall/Util.php
@@ -214,7 +214,7 @@ class Util
      */
     public static function isDomain($domain)
     {
-        $pattern = '/^(?:(?:[a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*(?:[a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])$/i';
+        $pattern = '/^(?:(?:[a-z\pL0-9]|[a-z\pL0-9][a-z\pL0-9\-]*[a-z\pL0-9])\.)*(?:[a-z\pL0-9]|[a-z\pL0-9][a-z\pL0-9\-]*[a-z\pL0-9])$/iu';
         if (preg_match($pattern, $domain)) {
             return true;
         }
diff --git a/src/opnsense/service/templates/OPNsense/Filter/filter_tables.conf b/src/opnsense/service/templates/OPNsense/Filter/filter_tables.conf
index 917ce4146..013ab567e 100644
--- a/src/opnsense/service/templates/OPNsense/Filter/filter_tables.conf
+++ b/src/opnsense/service/templates/OPNsense/Filter/filter_tables.conf
@@ -16,11 +16,11 @@
 {%      if alias.enabled|default('0') == '0'%}
       <address></address>
 {%      elif alias.type.startswith('urltable') %}
-      <url>{{ alias.content|e }}</url>
+      <url>{{ alias.content|e|encode_idna }}</url>
 {%      elif alias.type.startswith('url') %}
-      <aliasurl>{{ alias.content|e }}</aliasurl>
+      <aliasurl>{{ alias.content|e|encode_idna }}</aliasurl>
 {%      elif alias.content %}
-      <address>{{ alias.content|e }}</address>
+      <address>{{ alias.content|e|encode_idna }}</address>
 {%      endif %}{% if alias.proto %}
       <proto>{{ alias.proto|e }}</proto>
 {%      endif %}{% if alias.updatefreq %}