==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 1.6.2
- Deployed with iRedMail Easy or the downloadable installer? installer
- Linux/BSD distribution name and version: Ubuntu 20.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I'm trying to install iRedMail on a closed air-gapped test network. I moved the 1.6.2 installer onto the network and after configuring the host name, ran the installer. I got to the part where the installer reaches out to download the tarballs such as /yum/misciRedAdmin-1.8.1.tar.gz

Is it possible to download these and stage them locally and pass the sha256sum validation?

Being on an air-gapped network it obviously cannot reach