From bedc93d6b3b0995fd64425f4220dba22252ac160 Mon Sep 17 00:00:00 2001
From: Bernd Storath <999999bst@gmail.com>
Date: Tue, 21 Oct 2025 11:32:35 +0200
Subject: [PATCH] allow lower mtu

---
 src/server/utils/types.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/server/utils/types.ts b/src/server/utils/types.ts
index 9d00eacb..65697fa3 100644
--- a/src/server/utils/types.ts
+++ b/src/server/utils/types.ts
@@ -22,7 +22,8 @@ export const EnabledSchema = z.boolean({ message: t('zod.enabled') });
 
 export const MtuSchema = z
   .number({ message: t('zod.mtu') })
-  .min(1280, { message: t('zod.mtu') })
+  // min for IPv6 is 1280, but we allow lower for IPv4
+  .min(1024, { message: t('zod.mtu') })
   .max(9000, { message: t('zod.mtu') });
 
 export const PortSchema = z