Robuta

https://www.softether.org/4-docs/2-howto/6.VPN_Server_Behind_NAT_or_Firewall/1.Dynamic_DNS_and_NAT_Traversal

Dynamic DNS and NAT Traversal - SoftEther VPN Project

dynamic dns nat traversal softether vpn project

https://www.rfc-editor.org/rfc/rfc8155.html

RFC 8155: Traversal Using Relays around NAT (TURN) Server Auto Discovery

rfc traversal using relays around