So, what about this topic ?
Has things changed since 2015 ? There are a bunch of open subjects about this issue.
We are not all happy developpers with good buddies in the sec-team allowing a full internet access through their firewall. Several big companies do have severly resptricted firewalls for GOOD reasons, and we cannot use docker easily without any solution for this.
Of course, I’ve started to send access requests to .docker.com and .docker.io domains, but obviously it’s not enough…