I had the same problem (not with a ubuntu, but an old Mandriva) and the issue disapeared when I disable the router in my ADSL box ... So something linked to NAT. But I have to note that even with that NAT, it is working in windows. I will try to capture some wireshark traces.
I hop this issue will help to narrow down the issue
I had the same problem (not with a ubuntu, but an old Mandriva) and the issue disapeared when I disable the router in my ADSL box ... So something linked to NAT. But I have to note that even with that NAT, it is working in windows. I will try to capture some wireshark traces.
I hop this issue will help to narrow down the issue