Pfff
je me trompais dans ma commande 
j’ajoutais deux point en le nom de domaine et le port
du coup cette commande fonctione direct 
sudo duniter sync ts.gt.librelois.fr 443
[EDIT] voici les logs :
2018-12-03T19:06:38+01:00 - info: Next peering signal in 4 min
2018-12-03T19:06:39+01:00 - info: WS2P: init: bundle of peers 1/1
2018-12-03T19:06:39+01:00 - info: Block resolution: 0 potential blocks after current#443...
2018-12-03T19:06:39+01:00 - info: Block resolution: 0 potential blocks after current#443...
2018-12-03T19:07:08+01:00 - info: Block resolution: 0 potential blocks after current#443...
2018-12-03T19:07:08+01:00 - info: Web administration accessible at following address: http://localhost:9220
2018-12-03T19:07:08+01:00 - info: BMA server listening on http://127.0.0.1:10901
2018-12-03T19:07:08+01:00 - warn: Local node is not a member. Waiting to be a member before computing a block.
2018-12-03T19:07:08+01:00 - info: Sibling endpoints:
2018-12-03T19:07:08+01:00 - info: BMA access: g1.monnaielibre-saintnazaire.fr:443
2018-12-03T19:07:08+01:00 - info: [9Uwy2bEb] ⬇ PEER 9Uwy2bEb 414-0000
2018-12-03T19:07:08+01:00 - info: [9Uwy2bEb] ✔ PEER 9Uwy2bEb 414-0000
2018-12-03T19:07:08+01:00 - info: Next peering signal in 4 min
2018-12-03T19:07:10+01:00 - info: WS2P: init: bundle of peers 1/1
2018-12-03T19:07:10+01:00 - info: Block resolution: 0 potential blocks after current#443...
2018-12-03T19:07:10+01:00 - info: Block resolution: 0 potential blocks after current#443...
2018-12-03T19:07:39+01:00 - error: Error: timeout
at Timeout._onTimeout (/opt/duniter/node_modules/nat-upnp/lib/nat-upnp/client.js:187:14)
at ontimeout (timers.js:458:11)
at tryOnTimeout (timers.js:296:5)
at Timer.listOnTimeout (timers.js:259:5)
2018-12-03T19:10:23+01:00 - error: Error: timeout
at Timeout._onTimeout (/opt/duniter/node_modules/nat-upnp/lib/nat-upnp/client.js:187:14)
at ontimeout (timers.js:458:11)
at tryOnTimeout (timers.js:296:5)
at Timer.listOnTimeout (timers.js:259:5)