Ntp server overload cause?

[comperem]

and I’m not the first to discover this issue, but these entries are difficult to locate, for example with this subject:

Joining the pool kills my Internet

root@life-router:~# iptables -t raw -L Chain PREROUTING (policy ACCEPT) target prot opt source destination CT udp – anywhere anywhere udp dpt:ntp CT notrack Chain OUTPUT (policy ACCEPT) target prot opt source destination CT udp – anywhere anywhere udp spt:ntp CT notrack