Problem with squeezelite connecting to localhost (linux)

Hi all,
I've got a little problem to use squeezelite with lms running on the same host.
Let me explain :
When I'm on holidays, I usually don't have any network nor wifi. I run LMS on my laptop and (try to) use squeezelite as the player.
It works well when the wifi or the network is on. I run squeezelite, then on my browser, I go to http://localhost:9000/ and I can see squeezelite in the list of players.
But when I have no network, most of the time the case when I'm on holidays, I go to http://localhost:9000/ and can't see squeezelite.
I tried to run :
squeezelite-x86-64 -s localhost:9000
But it's the same.
I suspect it's not related to squeezelite but more to the network config on my laptop, but I can't figure out the problem.
Actually, I gave my laptop a name but don't remember how, so when I open a shell, I have the prompt
antonio@magneto

My /etc/hosts is :
127.0.0.1 localhost magneto

The ip adress of magneto is 127.0.0.1, the same as localhost.
Also, if I point to :
http://magneto:9000/
the page is not found.

Thanks a lot for help !