Not to mention. It is viable traffic to monitor, if I know that I get X number of icmp traffic through a point in tranfer consistently and that starts to drop off considerably that it may be a failing connection due to some circumstance I should start checking that equipment. And if im that connection in the middle... that is money ! On Wed, Feb 09, 2022 at 03:02:19PM +0000, J. Hellenthal wrote:

Just think of all the smokeping probes that are out there plus services like UptimeRobot and similiar.

you can't just put something up as a provider of a service and say ... ya know im not going to plan for this... traffic for them of any kind is money... not only to them but to their IX's as well.

ya just don't willy nilly cut that shit down and not expect a huge blowup to happen.

On Wed, Feb 09, 2022 at 03:53:15PM +0100, Łukasz Bromirski wrote:

...

Yup. And Google folks accounted for the world pinging them all day long.

I wouldn't call using DNS resolvers as best "am I connected to internet over this interface" tool though. A day, year or 5 years from now the same team may decide to drop/filter and then thousands of hardcoded "handmade automation solutions" will break. And I believe that's closer to what Masataka was trying to convey.

— Łukasz Bromirski

...

On 9 Feb 2022, at 14:23, Mark Tinka <mark@tinka.africa> wrote:

...

On 2/9/22 15:00, Masataka Ohta wrote:

Wrong. It is not bad, at least not so bad, pinging properly anycast DNS servers.

The point of anycast is resistance to DDoS.

But, relying on hard coded 8.8.8.8 is not a good idea because DNS service of the address may be terminated.

Instead, properly anycast root name servers are authoritative resources provided for public DNS queries which can be used for pinging, though pinging so with ICMP should be less painful for the servers.

That's like saying you won't have an egg for dinner because it's typically had for breakfast.

Users don't care what infrastructure has been designated for. If they can find another use for it other than designed, which serves their interests, they will use it.

We need to allow, and account, for that.

Mark.

-- The fact that there's a Highway to Hell but only a Stairway to Heaven says a lot about anticipated traffic volume.

-- The fact that there's a Highway to Hell but only a Stairway to Heaven says a lot about anticipated traffic volume.