- ip6tables nat commands now redirect stderr to /dev/null so missing
ip6table_nat module doesn't fail PostUp and kill the service
- Pre-load ip6table_nat kernel module (ignore_errors for minimal kernels)
- Collapse PostUp/PostDown to single-line semicolon-chained commands
(avoids any heredoc whitespace or multi-line parsing issues)
- Remove comments from inside wg0.conf config body
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Add IPv6 ip6tables rules to prevent IPv6 traffic leaks (forwarding was
enabled but only IPv4 masquerade existed)
- Tighten FORWARD chain: only allow wg0→internet and established return,
instead of blanket ACCEPT from wg0
- Scope NAT masquerade to VPN subnet only
- Block VPN clients from server-local services (SSH/80/443) via INPUT rules
- Set UFW DEFAULT_FORWARD_POLICY=ACCEPT (required for VPN routing; base
hardening sets default deny which blocks forwarded packets)
- Add SaveConfig = false to prevent runtime state overwriting config
- Add reload ufw handler
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
n0mad1k