xms-dns 0.1.0

Cliente Python para gestionar DNS en el panel XMS (Digital Value). CLI, biblioteca y servidor dyndns2/checkip compatible con ddclient. A, AAAA y TXT.

xms-dns

Cliente Python para gestionar DNS en el panel XMS (Digital Value). Incluye CLI (xms-dns), biblioteca y servidor dyndns2/checkip (xms-dns-server) compatible con ddclient. Soporta registros A, AAAA y TXT.

Setup

pip install xms-dns

For development:

git clone https://github.com/soukron/xms-dns.git
cd xms-dns
python3 -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"

Config file (optional, no secrets)

Create ~/.config/xms-dns/config with non-sensitive settings only:

mkdir -p ~/.config/xms-dns
cat > ~/.config/xms-dns/config <<'EOF'
XMS_BASE_URL=https://xms.digitalvalue.es
XMS_LOGIN=admin#example.test
EOF
chmod 600 ~/.config/xms-dns/config

Passwords are not read from this file. Use xms-dns login instead.

Environment variables override the config file. Override paths with XMS_CONFIG_DIR or XMS_CACHE_DIR.

Login

xms-dns login

Resolves settings in this order:

1. Environment variables (XMS_BASE_URL, XMS_LOGIN, XMS_PASSWORD)
2. Config file (XMS_BASE_URL, XMS_LOGIN only)
3. Interactive prompts for anything still missing (password always prompted unless in env)

Connection type is always siempre (permanent session). On success, the session cookie is saved to ~/.cache/xms-dns/auth.cache.

HTTP calls

Login and operations are separate executions:

• xms-dns login — authenticates against the panel and saves the session (its own HTTP calls; not counted against other commands).
• Any other command — exactly one HTTP request to the panel, using the cached session. Credentials are never sent again.

Example: xms-dns domains is a single GET to Operacion=Dominios. xms-dns list is a single GET to load the zone.

The only exception is upsert when the value changes: XMS has no inline edit, so the client deletes and recreates the record (two or three requests).

CLI

Global flags:

• -o / --output — output format: table (default), csv, json, or yaml
• -v / --verbose — log HTTP requests to stderr
• --debug — log requests and response bodies to stderr (includes verbose)

xms-dns login
xms-dns list gmbros.net
xms-dns -o csv list gmbros.net
xms-dns -o json domains
xms-dns -v list gmbros.net
xms-dns --debug upsert gmbros.net dyndns-test A 203.0.113.10

DNS commands use the cached session only. If not logged in or session expired:

error: Not logged in. Run: xms-dns login

Server (dyndns2 + checkip)

Start the dynamic DNS server:

xms-dns-server

Environment variables:

Variable	Default	Purpose
XMS_BASE_URL	https://xms.digitalvalue.es	XMS panel URL
XMS_SERVER_HOST	127.0.0.1	Bind address
XMS_SERVER_PORT	8080	Bind port
XMS_TRUST_PROXY	unset	Set to 1 to trust X-Forwarded-For for client IP
XMS_CACHE_DIR	~/.cache/xms-dns	Session cache directory

Reverse proxy (production): if xms-dns-server runs behind nginx, Caddy, Traefik, etc., set XMS_TRUST_PROXY=1. Otherwise /checkip and updates without myip see the proxy IP (127.0.0.1) instead of the client. Only enable this when a trusted proxy overwrites X-Forwarded-For — do not expose the server directly to the internet with this flag on.

Authentication

The server does not use xms-dns login. Each dyndns2 client sends XMS credentials via HTTP Basic auth:

• username → XMS login (e.g. admin#example.test)
• password → XMS password

The session cookie is cached per user in ~/.cache/xms-dns/server/{sha256}.cache (separate from the CLI auth.cache). If the cached session expires, the server re-authenticates with the credentials from the current request.

Endpoints

• GET /nic/update?hostname=home.example.test&myip=... — dyndns2 update. Returns good {value}, nochg {value}, badauth, etc. Always HTTP 200.
• Record types: A (default), AAAA, TXT.
  • A / AAAA: pass the address in myip, or omit it to use the client IP (X-Forwarded-For when XMS_TRUST_PROXY=1).
  • AAAA: set type=AAAA, or pass an IPv6 address in myip (auto-detected).
  • TXT: set type=TXT and pass the record data in txt= (or value=).
• GET /checkip — returns the caller's public IPv4. Optional ?format=pfsense for legacy pfSense.

If myip is omitted, the client IP is used (see X-Forwarded-For when XMS_TRUST_PROXY=1).

ddclient example

protocol=dyndns2
server=dyndns.example.test
login=admin#example.test
password=your-xms-password
home.example.test

Put TLS termination on a reverse proxy in production; bind locally by default. Remember XMS_TRUST_PROXY=1 on the server process (see above).

Library

from xms_dns import XmsClient

# Login once (CLI does this via `xms-dns login`)
with XmsClient(base_url="...", login="...", password="...") as client:
    client.authenticate()

# Later operations reuse auth.cache
with XmsClient.from_env() as client:
    client.ensure_session()
    client.upsert_record("gmbros.net", "home", "A", "203.0.113.10")

Tests

All default tests use mocked HTTP responses and do not contact the live XMS panel:

pytest

Live smoke test

xms-dns login   # or set XMS_PASSWORD for one-shot login inside the script
XMS_LIVE=1 python scripts/smoke_test.py

Security

• Do not store passwords in the config file
• Keep ~/.cache/xms-dns/auth.cache private (chmod 600)
• Keep server session caches private too: ~/.cache/xms-dns/server/*.cache (chmod 600)

License

Copyright (c) 2026 Sergio Garcia.

Licensed under CC BY-NC 4.0: non-commercial use with attribution required.