On 05.04.2018 22:49, H wrote: > I have recently installed docker and playing around with it. On a CentOS 7 machine, however, I am unable to get access to the outside internet, thus yum ... fails. The host machine runs fine. Which ip range do you use in your network? Maybe this overlaps with the docker default ip range (172.18.0.1/16). best regards Ulf