Teltonika RUTX SSL

Valid Let's Encrypt certificates on Teltonika RUTX (RutOS / OpenWrt) devices via acme.sh with a DNS-01 challenge against the Hetzner Cloud DNS API (dns_hetznercloud plugin).

Installation

1. Copy the content of rc.local into System → Custom Scripts in the WebUI (/etc/rc.local).
2. Fill in the configuration block at the top:
   • HETZNER_TOKEN - Hetzner Cloud API token (project token with read & write permissions, created in the Hetzner Cloud Console)
   • SSL_DOMAIN - the certificate domain, e.g. router.example.com
   • ACME_MAIL - your account mail address
3. Reboot.

To change the configuration later, edit /root/ssl.conf on the device - the block in rc.local is only used to seed it once.

Related

• RUTX-DYNDNS-HETZNER - DynDNS (A + AAAA) via the Hetzner Cloud DNS API
• RUTX-GPS - GPS tracking to Nextcloud PhoneTrack
• Combined rc.local example (DynDNS + SSL + GPS)

Tested Devices

Device	Firmware Version
RUTX11	RUTX_R_00.07.24.1
RUTX11	RUTX_R_00.07.12
RUTX50	RUTX_R_00.07.06.3

Changelog

• 2026-07-29 - Switched to the Hetzner Cloud DNS API (dns_hetznercloud), automatic migration/reissue for certificates from the retired dns_hetzner plugin, script is now downloaded from this repo, configuration moved to /root/ssl.conf.
• Check for acme client before download.