From 5ed94954e62c3207cf4189515d905de91879902e Mon Sep 17 00:00:00 2001
From: Mauricio Siu <47042324+Siumauricio@users.noreply.github.com>
Date: Thu, 6 Aug 2026 00:01:57 -0600
Subject: [PATCH] Merge pull request #4972 from
 Dokploy/fix/domain-single-label-hostname

fix(domain): allow single-label hostnames without a TLD

(cherry picked from commit 75448f358e8dc8d15f88d6b0112b1e186ada668d)

[skip ci]
---
 apps/dokploy/__test__/utils/hostname-validation.test.ts | 4 +++-
 packages/server/src/utils/hostname-validation.ts        | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/apps/dokploy/__test__/utils/hostname-validation.test.ts b/apps/dokploy/__test__/utils/hostname-validation.test.ts
index c0e734282..4dac477da 100644
--- a/apps/dokploy/__test__/utils/hostname-validation.test.ts
+++ b/apps/dokploy/__test__/utils/hostname-validation.test.ts
@@ -9,6 +9,9 @@ describe("VALID_HOSTNAME_REGEX", () => {
 		"a.b.c.example.co",
 		"xn--80ak6aa92e.com",
 		"123.example.com",
+		"example",
+		"dokploy-server",
+		"localhost",
 	])("accepts valid hostname %s", (host) => {
 		expect(VALID_HOSTNAME_REGEX.test(host)).toBe(true);
 	});
@@ -17,7 +20,6 @@ describe("VALID_HOSTNAME_REGEX", () => {
 		"bbn_client.example.com",
 		"-example.com",
 		"example-.com",
-		"example",
 		"exa mple.com",
 		"example..com",
 		"",
diff --git a/packages/server/src/utils/hostname-validation.ts b/packages/server/src/utils/hostname-validation.ts
index be3407e5e..bc5aae7b6 100644
--- a/packages/server/src/utils/hostname-validation.ts
+++ b/packages/server/src/utils/hostname-validation.ts
@@ -1,8 +1,8 @@
 // Valid hostname per RFC 1123: labels of letters, digits and hyphens
-// (no leading/trailing hyphen), separated by dots. Underscores are rejected
+// (no leading/trailing hyphen), optionally separated by dots. Underscores are rejected
 // because Let's Encrypt refuses to issue certificates for them.
 export const VALID_HOSTNAME_REGEX =
-	/^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/;
+	/^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)*[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$/;
 
 export const INVALID_HOSTNAME_MESSAGE =
 	"Invalid domain name. Use only letters, numbers, hyphens and dots (e.g. example.com). Underscores are not allowed.";