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Android 12 IKEv2 may handle IKE-level fragments better than
IP-level fragmentation. iOS was failing with IKE fragmentation
previously (ECDSA cert era) — test if RSA cert + IKE fragmentation
now works for both platforms.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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strongSwan skips self-signed root CAs from CERT payloads by default.
Setting cacerts = chain-3.crt in the local section forces it to include
ISRG Root X1 explicitly so Android 12 can complete trust chain validation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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iOS may have a bug where it advertises N(FRAG_SUP) but fails to reassemble
IKE fragments in IKE_AUTH responses. Switching to fragmentation=no forces
the large IKE_AUTH response to be sent as a single UDP packet with IP-level
fragmentation, which iOS's standard IP stack handles correctly.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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fragmentation=no caused IP-level fragmentation (1808-byte packets) which is
blocked by mobile networks. Default IKE fragmentation (RFC 7383) works for
iOS/macOS with 2 fragments.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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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>
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- swanctl.conf.tpl: send_cert = always (fix Android cert verification failure)
- docker-compose.yml: mount intermediate CAs to /etc/swanctl/x509ca/
- install.sh: split server.crt into leaf + chain for proper chain distribution
- entrypoint.sh: run charon directly for Docker log visibility,
fix sysctl error handling, fix charon binary path
- strongswan.conf: increase IKE log level to 4 for debugging
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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- vpn/: Dockerfile, docker-compose.yml, swanctl.conf.tpl, entrypoint.sh
- install.sh: Caddy 証明書流用 + コンテナ起動
- renew-cert.sh: 証明書更新 + swanctl ホットリロード
- caddy/Caddyfile: vpn.yyamashita.com 追加（Let's Encrypt 証明書取得用）
- post-receive: vpn/deploy.sh を追加
- setup-route53.py: WEB_SUBDOMAINS に vpn を追加
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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