Access km3db through a proxy (?)

I am unable to access the DB through km3db (sds = km3db.StreamDS(container='pd'))). I'm getting immediately a connection error: 2022-06-02 08:59:16 ERROR ++ km3db: URLError '<urlopen error [Errno 111] Connection refused>', retrying in 30 seconds. Additionally, ping km3netdbweb.in2p3.fr works and I can access km3netdbweb.in2p3.fr through my web browser without any issue. But traceroute km3netdbweb.in2p3.fr just returns: traceroute to km3netdbweb.in2p3.fr (134.158.236.8), 30 hops max, 60 byte packets 1 _gateway (172.201.0.1) 0.351 ms 0.341 ms 0.334 ms 2 _gateway (172.201.0.1) 0.328 ms 0.312 ms 0.307 ms.

I'm usually working with a wired connexion to my lab's network, which uses a proxy, and with this setup I get all of the above. However, when using wifi, I have no problem accessing the DB with km3db. Hence, there might be a problem with accessing km3db through a proxy. @vpestel said he has some ideas but any feedback would be usefull :).