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authoryyamashita <yyamashita@hetzner.yyamashita.com>2026-07-01 13:24:22 +0900
committeryyamashita <yyamashita@hetzner.yyamashita.com>2026-07-01 13:24:22 +0900
commit5a7b068b67bfe623f6bc1a62dcddfca2535c3a46 (patch)
tree44bb575dcd87556fe957a1bb2a34f487497997da /vpn/swanctl.conf.tpl
parent75686581d208ba4b4263420db169f56083dda52b (diff)
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 <noreply@anthropic.com>
Diffstat (limited to 'vpn/swanctl.conf.tpl')
-rw-r--r--vpn/swanctl.conf.tpl1
1 files changed, 1 insertions, 0 deletions
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