nsd: adding captive portal dns redirect

Makefile

@@ -10,6 +10,7 @@ install:
 	@echo setup nsd dns server
 	install -o0 -g0 nsd/nsd.conf.d/* /etc/nsd/nsd.conf.d/
 	install -o0 -g0 nsd/zones/* /etc/nsd/zones/
+	systemctl restart nsd.service
 
 	@echo install nginx
 	rm -f /etc/nginx/sites-enabled/default

nsd/nsd.conf.d/server.conf

@@ -9,3 +9,7 @@ server:
 zone:
 	name: kraut.space
 	zonefile: kraut.space
+
+zone:
+	name: .
+	zonefile: captive-portals

nsd/zones/captive-portals

@@ -0,0 +1,24 @@
+$ORIGIN .			; default zone domain
+$TTL 2				; default time to live
+
+@ IN SOA doorito.tuer.kraut.space. office.kraut.space. (
+           2404182124  ; serial number <yymmddHHMM>
+           60	       ; Refresh
+           7200        ; Retry
+           60	       ; Expire
+           60          ; Min TTL
+           )
+
+	IN	NS	doorito.tuer.kraut.space.
+
+; Android
+connectivitycheck.gstatic.com. IN A 192.168.1.1
+clients3.google.com. IN A 192.168.1.1
+; Firefox
+detectportal.firefox.com. IN A 192.168.1.1
+; macOS / iOS
+captive.apple.com. IN A 192.168.1.1
+; Windows
+www.msftncsi.com. IN A 192.168.1.1
+www.msftconnecttest.com. IN A 192.168.1.1
+dns.msftncsi.com. IN A 192.168.1.1