zmap/zdns

A list of cloud providers ok with running zdns?

alexey-milovidov opened this issue · 4 comments

alexey-milovidov commented

We have a task to do reverse lookups of all IPv4 space, and when it is done, repeat it in an infinite loop. Leave it run for years.
Are there cloud providers who are known to don't mind this operation?

xiaopihaiK commented

Do you check the domain name by IP?

alexey-milovidov commented

Yes, PTR lookups.

xiaopihaiK commented
zakird commented

I would use Cloudflare (e.g., 1.1.1.1) and/or Google (e.g., 8.8.8.8). We have some details here about their performance (https://zakird.com/papers/zdns.pdf), but both providers are pretty good. You can also use --iterative if you don't want to depend on any external providers. I would not use the default Amazon or other cloud providers. Given past experiences, I would expect better network performance for this type of task on Amazon compared to Google.

CARI.net is generally pretty open to network measurement as well if you reach out to their support team.