I’m running 4.16 here on a PC box here and on an RB450G at our synagogue. This has been a headache for me.
I have a PPTP tunnel between both locations (for secure Asterisk connections between both locations). AMd that seems to work. I use dyndns.org to host DNS for both locations. THat works. I created a static DNS entry pointing to both PBXes on my box and remotely using the locally defined 10.x.y.z addresses. It seems when my router is rebooted things seem to work. If I trace to pbx.chabadofreading.homedns.org it works. Some time later this address no longer works and a trace takes me to the public ip of chabadofreading.homedns.org. This obviously disconnects things.
I’ve attached two screenshots of how things are now. Anyone have an insights? I’ve flushed the cache to no avail.
my core router 10.161.51.1 is a dns server as well as dhcp server.
I’ve configured 10.161.51.1 as the primary DNS
I’ve attached a screenshot
I think I may have found it but dont understand why it would work sometimes and others not. I set the DNS options as well and did not put 10.161.51.1 as the primary. I am rebooting the router and see what happens. let me report back later.