better-argo-tunnels/deploy/sms/README.md

Taylor sms.taylor-co.com (split DNS) layout

If HTTP DNS for a hostname points at the SMS public IP (e.g. 134.209.x.x) but the better-argo-tunnels tunnel-server and Traefik live on ingress.nixc.us, you get HTTP 404 on the public URL while the tunnel and routes are actually healthy on ingress.

Install onto sms (one shot)

From this repo, with SSH to ingress and sms:

cd deploy/sms
export SMS_SSH=root@sms.taylor-co.com
export INGRESS_SSH=root@ingress.nixc.us
./bootstrap-to-sms.sh

This will:

• scp the tunnel authorized_keys from ingress (/home/tunnel/.ssh/authorized_keys by default).
• scp the compose files and Caddyfile.example to /opt/taylor-sms-edge/.
• Append (deduped) those public keys to /root/.ssh/authorized_keys on SMS, with a timestamped backup of the previous file if one existed. Override with SMS_KEYS_USER=….

To use a local file instead of pulling from ingress: export AUTHORIZED_KEYS_LOCAL=/path/to/keys.

To keep the same Raspberry Pi tunnel clients and keys and still use SMS in front:

1. SSH relay (optional)

Run ssh-relay.compose.yml on the SMS host so Pis can set:

TUNNEL_SERVER=sms.taylor-co.com:2222

Traffic is forwarded to the real tunnel-server (default ingress.nixc.us:2222).

• Authorize the same client public key on ingress (authorized_keys for the tunnel user) — the relay is TCP-only, not another SSH key step.

2. HTTPS edge (this fixes 404 for names that resolve to SMS)

Run http-edge.compose.yml with a Caddyfile (see Caddyfile.example):

• Set INGRESS to the IP or stable hostname of the Traefik host (ingress public IP/hostname).
• Add one Caddy server block per Taylor hostname (e.g. king73.taylor-co.com).

Caddy gets Let’s Encrypt certs for those names on the SMS machine and reverse-proxies to https://$INGRESS, preserving Host:, so Traefik on ingress still matches Host(\...`)` rules.

Security note: the proxy uses tls_insecure_skip_verify to the origin because the connection is often IP-based. Restrict network path (same DC/VPC) or pin to a private IP if you can.

3. Simpler alternative

Point the Taylor hostnames’ A/AAAA at ingress.nixc.us and skip the SMS HTTP edge.

Files

File	Role
bootstrap-to-sms.sh	scp keys from ingress + these files to /opt/taylor-sms-edge, merge keys on SMS
ssh-relay.compose.yml	TCP :2222 → upstream tunnel-server
http-edge.compose.yml	Caddy on :80 / :443 → Traefik (HTTPS upstream)
Caddyfile.example	Template for one hostname; duplicate blocks as needed