connect_to_peer always timeouts

[adapt7]

Trying to connect to specific peers on start. Tried public ones as well as own full node but connect_to_peer always timeouts.

I double checked the IP, port and the key and they are correct.

Is there any code or action or config needed to be able to connect with other node via adnl.connect_to_peer?

Without this, simple adnl.connect works fine, gets some peers connected automatically on start however after some minutes all peers disconnects. That's my second question: why does it happen and how to make sure the adnl is always connected (for example to my own node)?