You're right this was not the problem. It worked a little bit after disabling internet (unplugging ethernet cable) but stopped working again, probably due to some caching.
This seems to be, indeed, a dns issue: using 127.0.0.1 instead of localhost works fine. Alternatively, disabling IPv6 for the dns in firefox (setting network.dns.disableIPv6 = True in about:config) also fixed the problem for the address localhost. Thanks again for the help! 2017-09-27 12:27 GMT+02:00 Thomas Kluyver <[email protected]>: > On 27 September 2017 at 09:54, Florian Aspart <[email protected]> > wrote: >> >> I can connect to the notebook "home" page but when I open a new kernel it >> cannot connect to it. Therefore it's definitely not a proxy issue. >> > > It's still possible that it's something like that. Some proxies have > trouble with websockets (which we use to connect to the kernel). Some > internet security software also interferes with websockets, but that > usually affects Windows users, whereas you said you're running Ubuntu. > > >> I'm running the Notebook version 5.0 but I also have a bunch of >> nbextensions >> <https://github.com/ipython-contrib/jupyter_contrib_nbextensions> >> running. I think one of them is causing the problem: I disabled all of them >> and, though I initially need internet to start the notebook, I can still >> run the notebooks in firefox after turnin off internet. >> I'll try to find which extensions does not work offline by disabling them >> one after the other and I'll report it in case somebody has the same >> problem. >> > > That's still weird, because it shouldn't require an internet connection at > any point. How are you turning off internet when you test this? It does use > the special 'loopback' network interface; it may be that you've done > something that disables all network interfaces, but I don't think it's > likely - I don't even know a command for that. > > You could also try upgrading to notebook 5.1. I don't think it's likely to > make a difference to that, but you never know. > > -- > You received this message because you are subscribed to a topic in the > Google Groups "Project Jupyter" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/jupyter/IiS54b-icOk/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/jupyter/CAOvn4qh81FRc5pm3hKn2NMmo-KzJ_LuDEr%2Bx_cqvVd%3DCPea_gA% > 40mail.gmail.com > <https://groups.google.com/d/msgid/jupyter/CAOvn4qh81FRc5pm3hKn2NMmo-KzJ_LuDEr%2Bx_cqvVd%3DCPea_gA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Project Jupyter" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jupyter/CAGA3%2B%2BK_V%2BiB9j0oz2QCOHhwaUBmStP49oK%3D5yM%2BeJV%3DvtWC4w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
