From: Michael Tremer <michael.tremer@ipfire.org>
Date: Mon, 22 Dec 2025 10:20:29 +0000 (+0000)
Subject: util: Don't consider domains with a hyphen or underscore as invalid
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=253b8a53c30cd6014c074fa7e866456bd5a4797a;p=dbl.git

util: Don't consider domains with a hyphen or underscore as invalid

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/dnsbl/util.py b/src/dnsbl/util.py
index bed15d1..dc9b1da 100644
--- a/src/dnsbl/util.py
+++ b/src/dnsbl/util.py
@@ -103,7 +103,11 @@ def is_fqdn(s):
 
 		# Labels my only contain alpha-numerical characters as well as dash and underscore
 		for ch in label:
-			if not ch.isalnum() or ch in "-_":
+			if ch.isalnum():
+				continue
+			elif ch in "-_":
+				continue
+			else:
 				return False
 
 	# The string cannot be an IP address