I have 3 clients which use an LTE service from a local supplier but I monitor their connections from my Dude server I run at my office.
The service provider in question uses some sort of NAT so their "Public" IP is not directly reachable, meaning I use an L2TP connection to my routerboard so that I can monitor and have access to their network for management purposes.
The L2TP works fine, and I can access my office router via Winbox from their connection but not the other way around. I can add the device in the Dude, and monitor via SNMP but when I fire up Winbox it connects but shows no information at all, and after a few seconds it disconnects.
Basically my question is, in order to use Winbox over L2TP are there any special NAT rules I should put in place, on both sides, other than the obvious routes which I've done?