Calculate the size of a DNS record in the cache
mikydevel at yahoo.fr
Tue Jul 28 22:47:46 UTC 2020
My cache is 100MB and I'd like to know how many records can fit inside.I suppose that it depends on the record: isc.org is 7 characters and shorter than http://www.example.com
And it probably depends on the type and adress.
So which size would isc.org A 220.127.116.11 be ?
I ask my question because I was wondering how many nxdomainattack000000001.example.com, nxdomainattack000000002.example.com...can I generate before fil in the cache of my recursive server
According to the RFC, if my example.com SOA TTL is 86400, the NXDOMAIN entry would remain in the cache for 1 day.
Thank you for sharing your thoughts
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