+ ssh \
+ ident
+allowservices inbound udp \
+ udpkey
+
+## We have to provide NTP service. The guests sync to our clock.
+ntpclient inbound $ntp_servers
+
+## Provide NTP service to untrusted clients.
+run ip46tables -A inbound-untrusted -p udp -j ACCEPT \
+ --source-port 123 --destination-port 123