Kerlink iFemtocell - connect to TTN?

Hi,

Sorry for revive the topic but I really need help to make my iFemtoCell works.

I installed the latest software and the latest spf from the kerlink documentation, I modify my global_conf.json (and I even try with this conf https://raw.githubusercontent.com/TheThingsNetwork/gateway-conf/master/EU-global_conf.json), for testing I allow ALL the requests in the firewall, but still nothing, my gateway won’t connect to the ttn.

Here is what I have in the spf.log :
Dec 20 09:10:40 klk-wifc-0303E3 local1.notice spf: ### [DOWNSTREAM] ###
Dec 20 09:10:40 klk-wifc-0303E3 local1.notice spf: # PULL_DATA sent: 6 (0.00% acknowledged, ping 0.00 ms)

What I am doing wrong ?

Thanks.