FreePBX 17 - ISO Installation

mephisto1073 · April 17, 2026, 8:26am

Hello everyone,

I’m not sure if this topic has already been discussed before, but I would like to install the FreePBX 17 in an air-gapped environment, without any access to the internet. Is there any ISO file that already includes the dependencies for FreePBX, followed by the FreePBX software itself. I’m looking to deploy the FreePBX 17 just like we used to do it with the older versions.
If such an ISO file does not exist, is there a list with all the dependencies and the software packages that are to be installed through the execution of the “sng_freepbx_debian_install.sh” script?

Kind regards,
Cosmin

penguinpbx · April 17, 2026, 5:53pm

Howdy! Welcome to the forums.

The FreePBX v17 ISOs are all built with sngfd12, and although the changelog was a little bungled by YT, the commit history is fairly verbose, and so are (most of) the PRs such as #43 which added a lot of work moving in a direction which might help with your desired airgap installation efforts. For example, many more Debian packages from both their upstream and Sangoma’s provided FreePBX repos were included in last month’s ISOs.

However, the ISO still currently blocks after the first reboot when pinging github.com fails:

github.com/FreePBX/sngfd12

roles/sngfd_factory_12/templates/sng_late_command.j2

c06b3e0cc


      
          Requires=network-online.target var.mount tmp.mount var-tmp.mount
          # first boot seems buggy but it is a newer systemd condition
          #ConditionFirstBoot=yes
          #Before=first-boot-complete.target
          
          [Service]
          Type=oneshot
          # getting a NOPERMISSION error without this sleep, ugh
          ExecStartPre=/usr/bin/sleep 15
          # make sure we have solid network connectivity before attempting to run the installer
          ExecStartPre=/usr/bin/bash -c 'while ! ping -c 1 github.com >/dev/null 2>&1; do echo "Network not reachable, retrying in 5 seconds..."; sleep 5; systemctl restart networking; done'
          # actually run the installer, with DAHDI drivers
          ExecStart=/usr/bin/env ASTVERSION=${asteriskversion} /usr/bin/bash /var/tmp/sng_freepbx_debian_install.sh ${shell_sng_opts}
          # if not successful, then get ready to reboot and try again
          ExecStartPost=-/bin/sh -c 'latest_log=$\$(ls -t /var/log/pbx/*.log | head -1); grep -q "Finished FreePBX 17 installation process" \$latest_log'
          # if successful, only then will next command run to prevent reinstall on next boot
          ExecStartPost=echo "Disabling sng-install-freepbx service from next boot following good install"
          ExecStartPost=/usr/bin/systemctl disable sng-install-freepbx
          EOFO
          
          if [ "$spicelevel" == "int" ]; then

…so that would need some attention (and maybe a separation of that systemd service file assembly into multiple separate template files to handle the online vs. offline situations, either manually or automatically.)

And, there would need to be similar (and probably more) changes in sng_freepbx_debian_install to make it work offline there as well e.g. wget, apt-get update, fwconsole ma upgradeall, etc.

mephisto1073 · April 21, 2026, 11:56am

Thank you very much for your reply. I will follow the steps described in the sngfd12

Kind regards,
Cosmin