What is a reasonable limit?

61

There is no IPv4 shortage. It was expected to happen, but it never did.

We can use IPv4 untill the end of time if people keep using NAT for their own networks.
It will not run out of IP’s.

In fact, many mistakes of the past are corrected, like IBM and Microsoft having many milions of IP’s.
Today many of their IP’s are being taken away.

We will not run out of V4 IP’s anytime soon. Sure it may happen at some time.
But the predictions it would have happened more then 10 years ago are not true, and it won’t happpen in the next 20 years either.

62

This thread is about what is the reasonable NTP query packet rate from a given source IP address. I do not mind having another topic dedicated to IPv4 versus IPv6 discussion.

I use standard configuration for the ntpd:

restrict default nomodify notrap nopeer noquery limited
discard monitor 100

I assume that the maintainers of the ntpd code know that using standard rate limiting configuration should not cause any harm.

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63

Screenshot 2022-12-12 at 11.53.48
Screenshot 2022-12-12 at 11.53.48731×358 36.7 KB

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64

Never assume - check, double check. :wink:

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65

Can you provide some none niche examples? E.g. Large providers who do that or mobile devices that use the NTP pool by default?

Every mobile provider I have worked with or used in Africa uses CGNAT, as there simply is not enough IPv4 address space in AFRINIC for all the consumers. Very few offer customers IPv6 addresses.

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