Setting up an Ald domain on different subnets to bypass closed ports?

Question

Debian

Good day :)
There are 2 subnets, all machines and a server on Astra-Linux SE (based on Debian)
1st 192.168.1.0 on it is an ald server and several arms
2nd 192.168.2.0 (several arms)
they are connected via a closed channel through firewalls, machines from different subnets see each other (ping, I go via ssh) but I can’t include the 2nd subnet in the domain, they explain this by the fact that ald work on ports that close firewalls (ports 0-1000 are closed on them) . It is not possible to reconfigure screens and open ports.
1) is it possible to configure ald on other ports, if so, how to do it?
2) if 1) it is not possible, what ways to bypass this problem would you recommend?
GRE tunnel is not suitable, again firewalls will not give
Thanks in advance!

Answer 1

What if you connect via VPN?