On 22/12/14 03:00, Igor Furlan wrote: > On Sat, Dec 20, 2014 at 6:44 PM, zep <zgreenfelder at gmail.com> wrote: >> are you sure that DNS is working correctly on the VM? e.g. what's in >> etc/resolv.conf? are you using NAT or a bridged network device? is >> there anything weird in the output of netstat -nr? are you using >> anything to proxy traffic? is there anything in iptables that could be >> blocking traffic? > > Mystery resolved. The CAT5 cable from router to the switch hub was > flaky. After I've replaced it with another one all the illogical > puzzling behavior went away. What I do not understand is why, for > example, some sites like, www.google.com and www.gmail.com worked > flawlessly all the time. At same time some sites (like www.delo.si) > worked and some others did not (like www.dnevnik.si) Hardware Heisenbugs are also a thing. Really. Glad it worked out for you! P.