Laptop:/etc/dhclient.conf
	send fqdn.fqdn "pinkje.secret-wg.org."; # what is my fqdn
	send fqdn.encoded on;         # send in dns wire format
	#send dhcp-lease-time 60;
	send fqdn.server-update off;  # tell dhcp srv not to hack A
	# tsig key shared with forward dns server
	#
	key pinkje.bert.secret-wg.org. {
	algorithm HMAC-MD5;
	secret
	"icÉ==";
	};
	# tell which key
	#
	zone secret-wg.org {
	primary 193.0.0.4;
	key pinkje.bert.secret-wg.org.;
	}
	Nameserver:/etc/named.conf:
	zone "secret-wg.org" {
	type master;
	file "zones/secret-wg.org.signed";
	notify yes;
	allow-transfer { key tsig.secret-wg.org.; };
	update-policy {
	grant  pinkje.bert.secret-wg.org. name pinkje.secret-wg.org ;
	};
	};