Port 8333 is available, but nmap say it's filtered.
PORT STATE SERVICE
22/tcp open ssh
8333/tcp filtered unknown
So I'm not sure if it's possible to connect directly to this node.
i dont recall where i read,
but i read something about dns seeds. maybe in bitcoin souorce code., ill have to check there.
at the initial start of bitcoind when there are no known nodes available., bitcoind gets its nodes list from predefined nodes ips and domain names , from source code.
i have to look in to it.