Apt-Cacher-NG SecurityOnion

I built out a SecuriyOnion Master server 16.04.2 (wanted an older copy), and wanted to use Master Server since this is what I work on mostly. I am pretty sure they renamed it from Master server, but off the top of my head I cannot remember what is the new term. From there I ran the full setup and made sure that SecurityOnion was able to process data, next I installed Apt-cacher-NG on this machine. The setup was pretty strait forward. sudo apt get apt-cacher-ng edit the apng.conf file sudo ufw allow 3142 (the port for other machines to talk to the caching server) Next I ran sudo-soup and watched the updates come in. Verified it was updated to SecurityOnion 16.04.07. After this I built a second machine running SecurityOnion 16.04.2 and edited the sources.list, adding the IP address of the primary client to the front end of each of the repo locations. From there I ran sudo soup, and watched it connect to the primary SecurityOnion server and process all the updates. After reboot I verified that this was brought up to SecurityOnion 16.04.7 also. One issue/question that I have right now is that I believe docker is not part of the repo checking, and that it looks somewhere else to do those updates. I will need to figure out how to do the docker updates on the "repo" so that I can do the docker in an offline update. I think next I am going to download a vanillia version of ubuntu and verify that I can pull updates from the SecurityOnion "Repo" server to update that to the newest version of Ubuntu (16.04). I know that I am running older versions of software, but I am locked into a certain version of software, so I have to work with what I am allowed.

Offline SecurityOnion

I have a VM built with SecurityOnion  14 running Apt-Cacher-NG which was able to download all the updates for this version and cache thing for other boxes. 

I will be running a bunch of offline SecurityOnion (currently using an older version 14) which I would like to try and keep updated (at the 14 level) as much as possible, but I cannot use sudo soup to download any updates from the internet. 

I have done this before but I didn't take any notes on how it was done (except the first part which was to use apt-cacher-ng).  Now I am on step two and not sure what to do. 

I was hoping there was an easy way to burn the cached file to a DVD and then load them on the stand-alone, but I cannot find any information that would help (doesn't help that I am not an expert on things, I usually only look up stuff when I am trying to solve an issue), I get by mostly though.  My friend Google is pretty helpful, guess I am not searching for the right words in this one. 

I can't use the apt-cacher-ng as a proxy server either.  This will be just one machine that gets updated, no other machines will be touching that one.   

If anyone has any idea's to let me know.  Like I said I am currently at the stage of using apt-cacher-ng.  Now trying to figure out how to export the information to use on another machine.