ntpclient inbound $ntp_servers
## Provide NTP service to untrusted clients.
-iptables -A inbound -p udp -j ACCEPT \
- --source-port 123 --destination-port 123 \
- -s 172.29.198.0/23
-ip6tables -A inbound -p udp -j ACCEPT \
- --source-port 123 --destination-port 123 \
- -s 2001:ba8:1d9::/48
-ip6tables -A inbound -p udp -j ACCEPT \
- --source-port 123 --destination-port 123 \
- -s 2001:8b0:c92::/48
+run ip46tables -A inbound-untrusted -p udp -j ACCEPT \
+ --source-port 123 --destination-port 123
## Guaranteed black hole. Put this at the very front of the chain.
run iptables -I INPUT -d 212.13.198.78 -j DROP