Skip to content

Booting Ubuntu Without External Access

How to install Ubuntu without internet access.


Default Ubuntu ISOs will attempt to check internet repositories, this can cause problems during provisioning if your environment does not have outbound access.

To workaround this problem, you need to supply a DNS and gateway for your subnet. There are several ways to do this:

  1. Internal to Digital Rebar: Define Options 3 (Gateway) and 6 (DNS) for your Machine Subnet
  2. External to Digital Rebar: Adding default_route=true to the boot parameters and include a DNS server on the local subnet in DHCP

Additional Information

Additional resources and information related to this Knowledge Base article.

See Also

  • use of the package-repositories Param to specify internal Package Repositories




ubuntu, no network access, package repositories, package-repositories, default gateway

Revision Information

KB Article     :  kb-00033
initial release:  Wed Jun 10 12:34:39 PDT 2020
updated release:  Wed Jun 10 12:34:39 PDT 2020