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blechschmidt / massdns

A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)
GNU General Public License v3.0
3.08k stars 460 forks source link

About the resolvers.txt #56

Open marcelo321 opened 4 years ago

marcelo321 commented 4 years ago

I wanted to know if a big amount of resolvers is needed for the tool to work properly. i tried running the tool with only 10 public and common DNS resolvers and the tool had less "REFUSED", does that mean that is running ok?

What would be a good value for -s if i have only 10 resolvers in resolvers.txt?

marcelo321 commented 4 years ago

The total "REFUSED" stays at +-25% all the times i run the tool with the 900 defualt resolvers. it stays at 0% when i re-run it with only 10 resolvers.

But i get like 4x more subdomains when i run it with the 900 resolvers, how do i know if there are false subdomains in there?

My subdomain enumerations list really gets much bigger when using the default 900 resolvers and the default names.txt so i don't know how to know if the tool is working correctly or it is giving bad results.