server-setup.sh configured ufw and stopped there, which leaves SSH open
to unlimited password guessing and the kernel on defaults that are wrong
for an internet-facing host.
Adds three drop-in files, so a re-run replaces its own config and never
edits a distro file in place:
/etc/ssh/sshd_config.d/10-marketplaces-hardening.conf
password and keyboard-interactive auth off, root key-only,
no agent/X11 forwarding, MaxAuthTries 3, 30s login grace
/etc/fail2ban/jail.d/marketplaces.local
sshd, nginx-http-auth, nginx-bad-request; 5 in 10m, 1h ban
/etc/sysctl.d/99-marketplaces-hardening.conf
no redirects or source routing, rp_filter, SYN cookies,
forwarding off, restricted kernel pointers and dmesg
Both accounts on the host are key-only by construction - the deploy user
is created with no password at all - so disabling password auth cannot
lock anyone out. It only closes guessing against a credential nobody
intended to exist.
The sshd block runs `sshd -t` first and removes its own drop-in if the
test fails. A bad sshd config that takes effect on a remote box is how
people lock themselves out permanently.
DEPLOYMENT.md §3.2 documents all three plus the post-provision checks.
Not copied from the reference implementation: its hardcoded server IP.
Kept as-is because ours is already better: add-domain.sh pre-checks the
DNS A record and runs nginx -t before and after.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Adding a domain was a manual per-domain script run. With domains arriving
continuously that does not hold, so certificate issuance is now automatic.
HTTP already needed no work: the nginx catch-all serves any Host and the SPA
resolves its tenant from that header. Only TLS needed a name-by-name step.
Two mechanisms:
- setup-wildcard-tls.sh issues one DNS-01 wildcard for *.<apex>, after which a
new tenant subdomain is live over HTTPS with zero certificate work.
- sync-domains.sh reconciles tenant-owned domains against a desired list on a
10-minute timer: issues what is missing, skips certificates with >30 days
left, skips names already covered by the wildcard, waits out unpropagated
DNS, and caps issuance per run so a bad source cannot burn the weekly ACME
budget.
Safety properties worth stating: a failed fetch of the desired list aborts the
run rather than reading as "remove every domain"; removing a domain disables
its server block but keeps the certificate, so re-adding is instant; malformed
hostnames are rejected before reaching certbot or an nginx server_name.
The source is pluggable - a file today, the Phase 9 domain registry once it
exists, whose MarketplaceDomain statuses already match what this needs.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
There was no CD: pushing to main deployed nothing, and deploys were a manual
copy onto the server. This adds the missing half.
- .github/workflows/deploy.yml - build, upload to a per-commit release
directory, swap the symlink atomically, reload nginx, verify over HTTP.
The swap only happens after the upload is verified to contain index.html,
so a failed deploy leaves the previous release serving.
- scripts/deploy/server-setup.sh - idempotent one-time provisioning: nginx,
certbot, ufw, and a key-only deploy user whose sole sudo right is
"systemctl reload nginx".
- scripts/deploy/add-domain.sh - per-domain server block plus TLS issuance,
run once a domain's A record resolves to the server.
- docs/DEPLOYMENT.md - setup order, required CI secrets, rollback, limits.
Also adds .gitattributes: the shell scripts were being checked out with CRLF
endings, which makes bash fail on the shebang line on Linux.
Host keys are pinned via DEPLOY_KNOWN_HOSTS rather than trusted on first use.
No credentials are committed; all four deploy secrets are supplied by CI.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
