#3722: Tweak ordering of permitted characters to avoid creating a regex range

netbox/ipam/migrations/0027_ipaddress_add_dns_name.py

@@ -14,6 +14,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='ipaddress',
             name='dns_name',
-            field=models.CharField(blank=True, max_length=255, validators=[django.core.validators.RegexValidator(code='invalid', message='Only alphanumeric characters, hyphens, periods, and underscores are allowed in DNS names', regex='^[0-9A-Za-z.-_]+$')]),
+            field=models.CharField(blank=True, max_length=255, validators=[django.core.validators.RegexValidator(code='invalid', message='Only alphanumeric characters, hyphens, periods, and underscores are allowed in DNS names', regex='^[0-9A-Za-z._-]+$')]),
         ),
     ]

netbox/ipam/validators.py

@@ -2,7 +2,7 @@ from django.core.validators import RegexValidator
 
 
 DNSValidator = RegexValidator(
-    regex='^[0-9A-Za-z.-_]+$',
+    regex='^[0-9A-Za-z._-]+$',
     message='Only alphanumeric characters, hyphens, periods, and underscores are allowed in DNS names',
     code='invalid'
 )