When using a fritzbox with attached phones in bridge mode behind another router, manufacturer avm suggests to enable the option
Keep port forwarding of the Internet router enabled for telephony, instead of adding static port forwarding in the NAT.
I wanted to see whether my router supports this, and what timeout to choose (the fritzbox has a sub-option
Keep port forwarding enabled every [0.5-5] minutes.
So, I would need to find out
what is the underlying technology on that option? Googling just led me to
reverse port forwarding, but from what I read this is completely unrelated and just refers to reverse ssh tunnels.
how can I configure the timeout in question in my Mikrotik Router (RouterOS 6.33)?