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The recommended setup is a server running unbound in a release newer than 1.7.2.
Example configuration:
server:
# allow_setrd is needed to force a recursive lookup
# to follow through with the forward for all requests
access-control: 0.0.0.0/0 allow_setrd
access-control: ::/0 allow_setrd
interface: 0.0.0.0
interface: ::
hide-identity: yes
hide-version: yes
minimal-responses: yes
# Needed if you run u-bmc in a simulator on localhost
do-not-query-localhost: no
# Enable for helpful debugging
# verbosity: 4
local-zone: "." refuse
local-zone: "u-bmc.tk" transparent
forward-zone:
name: "demo.u-bmc.tk"
forward-addr: 127.0.0.1@6053
Ensure that you add NS records into the domain (in this case demo.u-bmc.tk) for the machine you're running this on.
Things we know add seconds when booting and what can be done.
Verified boot adds about 8 seconds in simulator before the real kernel has been kexec'd.
You can tweak what compression Ubifs is created to use. LZO and Zlib is what linux supports, we're using Zlib right now as it buys about 10% space. At 2019-04-08 the measurement was LZO at 13.35 MiB and Zlib at 12.29 MiB (46% vs 42% free).
It adds 1-2 seconds to the boot time though in the simulator (but the simulator is pretty slow) Loader stage: 6.5 sec (LZO) - > 7.6 sec (Zlib)