How to set up PostgreSQL replication from a gray IP address?

Question

PostgreSQL

It is not possible to set up PostgreSQL replication, where the master server has a "white" IP address, and the slave has a "gray" one (read "behind NAT's"). In general, it is clear that in 99% of cases this is not necessary, but I have exactly that case out of 1% ... Of course, Google could not answer, or I searched badly.

Answer 1

Tunnel, maybe it would be better to do?
Over SSH or some kind of VPN.

Answer 2

So set up an (open)VPN tunnel or ssh -N -f -L.... or in any other way out of a dozen possible, from localhost to localhost and never show anyone that postgre is hanging on the external interface. They throw bast shoes.

Answer 3

make the simplest ipigre tunnel
, it will restore itself if the connection
appears again