Just for future reference, it was unclear in my mind why the logs showed apt-get update succeeding which seemed to require dns (archive.ubuntu.com). The reason that worked was that http_proxy was set for apt. When using an http proxy, the client system does not resolve the Host, but rather leaves that to happen on the proxy.
Just for future reference, it was unclear in my mind why the logs showed apt-get update succeeding which seemed to require dns (archive. ubuntu. com). The reason that worked was that http_proxy was set for apt. When using an http proxy, the client system does not resolve the Host, but rather leaves that to happen on the proxy.