# Need a hint with Got SERVFAIL reply from 172.64.36.1 SOLVED

I can’t connect my tunnel and I’m unable to figure why.
I could use a hint

Cordially

By the way, I haven’t yet understood how Cloudflare works (the economic model, I mean), and how can it be free. It’s more than amazing

``````nslookup whatever.tld
;; Got SERVFAIL reply from 172.64.36.1, trying next server
Server:		172.64.36.2

** server can't find whatever.tld: SERVFAIL
``````
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It’s working now. Sorry for the noise, guys!