From 5a7b068b67bfe623f6bc1a62dcddfca2535c3a46 Mon Sep 17 00:00:00 2001 From: yyamashita Date: Wed, 1 Jul 2026 13:24:22 +0900 Subject: Fix IKE fragmentation: use fragmentation=no instead of fragment_size=0 fragment_size=0 was interpreted as minimum fragment size (resulting in 4 tiny fragments), not disabled. fragmentation=no in swanctl.conf is the correct per-connection setting to disable IKE fragmentation entirely. The server now sends a single large UDP packet; the OS kernel handles IP fragmentation instead of the IKE layer. Co-Authored-By: Claude Sonnet 4.6 --- vpn/swanctl.conf.tpl | 1 + 1 file changed, 1 insertion(+) (limited to 'vpn/swanctl.conf.tpl') diff --git a/vpn/swanctl.conf.tpl b/vpn/swanctl.conf.tpl index da988e0..1fc84df 100644 --- a/vpn/swanctl.conf.tpl +++ b/vpn/swanctl.conf.tpl @@ -1,6 +1,7 @@ connections { ikev2-eap { version = 2 + fragmentation = no # iOS/macOS/Android 互換の暗号スイート proposals = aes256gcm16-prfsha256-ecp256,aes256-sha256-ecp256,aes256gcm16-prfsha384-ecp384,aes256-sha256-modp2048,aes256-sha1-modp2048 -- cgit v1.2.3